Botox prevents migraine headaches before they start, but takes time to work. “I look to the second and third treatments to maximize effects,” says Dr. Andrew Blumenfeld. “Patients see increasing benefit with an increase in the number of treatment cycles.” One treatment lasts for 10-12 weeks, and patients reported that two Botox treatments reduced the number of headache days by approximately 50%.
Of 1242 overactive bladder patients in placebo-controlled clinical studies of BOTOX, 41.4% (n=514) were 65 years of age or older, and 14.7% (n=182) were 75 years of age or older. Adverse reactions of UTI and urinary retention were more common in patients 65 years of age or older in both placebo and BOTOX groups compared to younger patients (see Table 18). Otherwise, there were no overall differences in the safety profile following BOTOX treatment between patients aged 65 years and older compared to youn ger patients in these studies.
Results will be evident within three to 10 days. Photographs may be taken before the procedure so that patients can check their results themselves rather than relying on their memory. It is surprising to see how many people do not recall how they looked before the procedure and are amazed at the difference when shown a picture. Prior to having the procedure done, the patient should realize that Botox does not actually erase lines but relaxes them. What this means is that deeper lines will become somewhat less deep and superficial lines will nearly disappear. This can be likened to the act of steaming a garment's wrinkles rather than ironing them.
The last thing I've found to be a little frustrating is that my body tends to metabolize the Botox a bit faster than I can get it. While Ravitz tells me I can't get the treatment any more frequently than every three months, because that's the rate at which the body can develop antibodies against it, I find my migraines amping up in frequency again about two to two and a half months after I get the shots. However, given the fact that with the Botox, my migraines have gone down from about four a week to one or two at most, it's absolutely increased my quality of life, and I'm glad I gave it a shot...or 40.
In many children, there are a few muscle groups that can have very active spasticity. A more focal approach to these muscles would be better than a widespread approach. In this case a doctor may advise a nerve block to interrupt the signal to the muscle that is spastic. Once the signal that is carried to the muscle by the nerve is interrupted, the spasticity will decrease.
Autonomic dysreflexia associated with intradetrusor injections of BOTOX® could occur in patients treated for detrusor overactivity associated with a neurologic condition and may require prompt medical therapy. In clinical trials, the incidence of autonomic dysreflexia was greater in patients treated with BOTOX® 200 Units compared with placebo (1.5% versus 0.4%, respectively).

BOTOX® increases the incidence of urinary tract infection. Clinical trials for overactive bladder excluded patients with more than 2 UTIs in the past 6 months and those taking antibiotics chronically due to recurrent UTIs. Use of BOTOX® for the treatment of overactive bladder in such patients and in patients with multiple recurrent UTIs during treatment should only be considered when the benefit is likely to outweigh the potential risk.


The frontalis muscle attaches to the skin of the lower forehead and ascends to join the fronto-occipital aponeurosis. The action of the frontalis muscle involves elevation of the eyebrows to produce expressions such as surprise, and can cause deep transverse wrinkles on the forehead. The antagonists for brow depression are the corrugators, procerus, and orbicularis oculi muscles.

Dubbed as the “little neurotoxin that could,” by USA Today, Botox now boasts sales of well over $1 billion for its manufacturer, Allergan. Many of us who start to see our migraine-furrowed forehead lines show up in our 30s think: hey, maybe Botox for migraine could help me too. But before you say “heck yes!” at the next Botox party or med-spa, be sure you know what you’re getting into.


But for some conditions, step therapy can be downright harmful. In a 2016 op-ed in The Boston Globe, a patient with ulcerative colitis wrote that his health insurance forced him to try a cheaper treatment for six months, instead of the pricier meds his doctor wanted to prescribe. In those six months, his colon deteriorated so badly it had to be removed.
In fertility studies of BOTOX (4, 8, or 16 Units/kg) in which either male or female rats were injected intramuscularly prior to mating and on the day of mating (3 doses, 2 weeks apart for males, 2 doses, 2 weeks apart for females) to untreated animals, reduced fertility was observed in males at the intermediate and high doses and in females at the high dose. The no -effect doses for reproductive toxicity (4 Units/kg in males, 8 Units/kg in females) are approximately equal to the maximum recommended human dose of 400 Units on a body weight basis (Units/kg).
Dr. Schwedt believes ARMR offers hope for patients living with migraine. “ARMR data could lead to breakthroughs in the field,” he says. One hope for ARMR is that it will contribute to the ability for health care providers to use precision medicine to treat their patients. Clinical trials show which migraine therapies are overall effective for groups of people with migraine; however, health care providers are still working to understand which specific therapy is ideal for a particular patient. “One of the challenges we have in this field right now is being able to determine which exact therapy is going to be best for which patient,” Dr. Schwedt says. “For example, we might know that about 50% of patients will benefit from a specific migraine preventive therapy, but we don’t know in advance which 50% that is. I believe the data we’re collecting in ARMR is going to help us get to the stage where we can practice precision medicine, knowing which therapy is most likely to help an individual patient prior to the patient starting that therapy.”
Each vial of BOTOX contains either 50 Units of Clostridium botulinum type A neurotoxin complex, 0.25 mg of Albumin Human, and 0.45 mg of sodium chloride; 100 Units of Clostridium botulinum type A neurotoxin complex, 0.5 mg of Albumin Human, and 0.9 mg of sodium chloride; or 200 Units of Clostridium botulinum type A neurotoxin complex, 1 mg of Albumin Human, and 1.8 mg of sodium chloride in a sterile, vacuum-dried form without a preservative.
The recommended dilution is 200 Units/2 mL, 200 Units/4 mL, 100 Units/1 mL, or 100 Units/2 mL with preservative-free 0.9% Sodium Chloride Injection, USP, depending on volume and number of injection sites desired to achieve treatment objectives (see Table 1). In general, no more than 50 Units per site should be administered using a sterile needle (e.g., 25-30 gauge) of an appropriate length. Localization of the involved muscles with electromyographic guidance may be useful.

The efficacy and safety of BOTOX for the treatment of lower limb spasticity was evaluated in Study 6, a randomized, multi-center, double-blind, placebo-controlled study. Study 6 included 468 post-stroke patients (233 BOTOX and 235 placebo) with ankle spasticity (modified Ashworth Scale ankle score of at least 3) who were at least 3 months post-stroke. A total dose of 300 Units of BOTOX or placebo were injected intramuscularly and divided between the gastrocnemius, soleus, and tibialis posterior, with optional injection into the flexor hallucis longus, flexor digitorum longus, flexor digitorum brevis, extensor hallucis, and rectus femoris (see Table 33) with up to an additional 100 Units (400 Units total dose). The use of electromyographic guidance or nerve stimulation was required to assist in proper muscle localization for injections. Patients were followed for 12 weeks.
The potency Units of BOTOX® are specific to the preparation and assay method utilized. They are not interchangeable with other preparations of botulinum toxin products and, therefore, Units of biological activity of BOTOX® cannot be compared to nor converted into Units of any other botulinum toxin products assessed with any other specific assay method.
A BOTOX “treatment” consists of 31 injections to the head and neck areas, if adherence to the FDA approved protocol is followed. Except for injection into the procerus, which is in the midline, all others are paired sets of injections on the left and right sides. Muscles included are the frontalis and temporalis areas as well as the occipitalis, upper cervical paraspinals, and trapezii. The amount injected at each of the 31 injection sites is small—5 units of BOTOX in a volume of 0.1 mL normal saline or sterile water. A total of 155 units is are typically used.
Botulinum toxin has been investigated for use in patients with blepharospasm in several studies. In an open label, historical ly controlled study, 27 patients with essential blepharospasm were injected with 2 Units of BOTOX at each of six sites on each side. Twenty-five of the 27 patients treated with botulinum toxin reported improvement within 48 hours. One patient was controlled with a higher dosage at 13 weeks post initial injection and one patient reported mild improvement but remained functionally impaired.
Forehead – The horizontal lines and furrows on your forehead will not magically disappear. Which is why you should consider getting a Botox injection before they start to set in permanently. These lines will become more excessive with age, and will age to your appearance.Over time by repeatedly injecting these lines the deeply etched lines will become progressively improved

In May, hedge fund Appaloosa Management, run by David Tepper, received antitrust clearance from the Federal Trade Commission to potentially increase its stake in the Botox-maker. This means that Appaloosa now has more flexibility to push for further changes at Allergan. It remains to be seen if that happens, but if so, it could mean more changes are ahead for the drugmaker.
The cost of a Botox treatment is usually communicated as a flat cost, but can also be measured in individual injectable units. Each unit usually costs somewhere in the neighborhood of $15, but prices vary between geographic areas and between individual clinics. How many units are needed per treatment will depend on which areas of your face are being treated, and on your individual facial anatomy.
Botox comes as a crystalline substance from the manufacturer, which then has to be reconstituted with saline or another liquid. Practitioners add varying amounts of liquid when reconstituting it. Although there is no right or wrong amount of liquid to add, most physicians add about 2 mL-3 mL (about a half a teaspoon) of liquid to each vial. Some add quite a bit more, which can lead patients to think they are getting more Botox when, in reality, they are getting the same or less amount of Botox than samples reconstituted in a stronger way. It is the total dose of medication, not the volume of liquid, that leads to the desired effect.
I’ve had migraine since I was 5 and have learned a lot over the years about how to manage it. I’m aware of the foods that trigger my migraine attacks, and I try to eat consistently and drink a lot of water. My children and I eat as healthy as possible throughout the day to keep energy up, knowing skipped meals are a trigger for both tantrums and migraine attacks. Staying on a schedule allows my body to stay stable and helps me identify triggers. The same goes for my children. Maintaining their energy and providing them with good food and water prevents them from getting “hangry” later. We all want to avoid a food meltdown. I know that I am triggered by weather, hormones, stress, diet, hydration, light, sound, heat, sleep and more. I try to be prepared for as many of these situations as I can, but some are easier to avoid than others. If you’re unaware of your triggers, keep a log. There are migraine apps that can help you track your symptoms and identify what’s causing your attacks. Finding patterns in how you react may help with identifying effective medications or alternative treatments.
The most commonly reported side effects for JUVÉDERM® injectable gels were injection-site redness, swelling, pain, tenderness, firmness, lumps/bumps, bruising, discoloration, and itching. For JUVÉDERM VOLBELLA® XC, dryness was also reported. For JUVÉDERM VOLUMA® XC, side effects were predominantly moderate in severity, with duration of 2 to 4 weeks; for JUVÉDERM® Ultra XC , JUVÉDERM® Ultra Plus XC, or JUVÉDERM VOLLURE™ XC, they were mostly mild or moderate in severity, with duration of 14 days or less; and for JUVÉDERM VOLBELLA® XC, they were predominantly mild or moderate, with duration of 30 days or less.
The recommended dilution is 200 Units/4 mL or 100 Units/2 mL with preservative -free 0.9% Sodium Chloride Injection, USP (see Table 1). The lowest recommended starting dose should be used, and no more than 50 Units p er site should generally be administered. An appropriately sized needle (e.g., 25-30 gauge) may be used for superficial muscles, and a longer 22 gauge needle may be used for deeper musculature. Localization of the involved muscles with techniques such as needle electromyographic guidance or nerve stimulation is recommended.
In patients who are not catheterizing, post-void residual (PVR) urine volume should be assessed within 2 weeks post treatment and periodically as medically appropriate up to 12 weeks, particularly in patients with multiple sclerosis or diabetes mellitus. Depending on patient symptoms, institute catheterization if PVR urine volume exceeds 200 mL and continue until PVR falls below 200 mL. Instruct patients to contact their physician if they experience difficulty in voiding as catheterization may be required.
According to the PREEMPT paradigm, one injection of 5 units of onabotulinumtoxinA into four sites (total 20 units) into the frontalis muscle is done. The injection points are located by visually drawing a line up from the medial edge of the supraorbital rim. Patients will be injected into the muscle in the upper third of the forehead at least 1 to 2 fingerbreadths above the corrugator injection site. The lateral muscle injection areas are parallel and approximately 1 fingerbreadth lateral to the medial injection site, which is roughly in line with either the midpupillary line or the lateral edge of the cornea, which is the limbus line. In cases in which I am worried about ptosis, I inject the frontalis close to the hairline. In order to reduce the risk of these unwanted effects, injections should be administered in the upper third of the forehead only. The needle should be inserted at a 45° angle superiorly. Because the frontalis is an elevator muscle, weakening can cause brow ptosis or exacerbate preexisting brow ptosis.
When BOTOX (4, 8, or 16 Units/kg) was administered intramuscularly to pregnant mice or rats two times during the period of organogenesis (on gestation days 5 and 13), reductions in fetal body weight and decreased fetal skeletal ossification were ob served at the two highest doses. The no-effect dose for developmental toxicity in these studies (4 Units/kg) is approximately equal to the human dose of 400 Units, on a body weight basis (Units/kg).
$12 per unit is the typical rate for botox in North Jersey. I just moved here from Nashville and it is actually the same price there as here, surprisingly. Although in Nashville my Dr ran specials twice a year where she charged $9 a unit so I always made sure to hit up those offers. Her name is Ms. Sue and she is in Hendersonville Tn. Her office is called Ms.Sue's Med Spa. She runs amazing offers on injections if you sign up to get emails. Northern Jersey juverderm is significant different in price when it comes to juvederm and injections. But botox price is the same. I am now using Dysport instead of regular botox and that's about the same price ... The units are cheaper but you need twice as much so it equals out about the same. Dysport kicks in within 3 days and I love that. I would like to find a good doctor up here with better prices. I will post if I find one
So when I first propositioned my husband about the idea of me getting a bit of Botox for the furrowed brow I've earned from a decade of writing and editing behind a computer screen, he was adamantly against it. And frankly, I was a bit scared too. I mean, isn't Botox poison? As an idealistic 21 year old, it was easy to say that I'd never put that stuff in my body, that "poison." Now, I'm not so sure.
On Wednesday, Saunders said at a conference that Allergan is planning to sell its women's health and infectious disease businesses, putting more attention on Allergan's four "core" businesses, which are eye care, aesthetics, diseases of the central nervous system, and gastrointestinal conditions. Allergan's stock fell on the news, suggesting investors haven't been appeased yet.
Botox often gets a bad rep for leaving patients looking a little frozen, but that's the fault of bad technique, not necessarily the procedure itself, explains Day. "In many places where it's not a trained aesthetic physician doing the injection, it's really just inject by number," she says. The problem with this is that no two faces, or even two sides of a face, are the same. "That cookie cutter, one-size-fits-all approach is what often gives these treatments a bad name," says Day.
The 5-unit dose that is injected at each site is a very low dose. Earlier studies with total dosing below 155 units failed to show separation from placebo. As a result, I encourage all patients to get a minimum of 155 units, even if they have a small frame. The optional component of the injection paradigm is the 40 units that are used for following the pain sites. The pain sites are the temporalis, occipitalis, and trapezius. These can be held if the injector is concerned. I do not reduce the dose below 155 units as lower doses have not separated from placebo, and thus I may not achieve an adequate headache effect with a lower dose. In fact, most of the time I increase the dose to at least 165 units, as this was the mean dose in the PREEMPT trials. I inject 5 units behind each ear for a bilateral headache and 5 units in two sites behind one ear in a side-locked headache.
SkinMedica® TOTAL DEFENSE + REPAIR Broad Spectrum/PA++++ Sunscreens (SPF 34, SPF 34 Tinted, and SPF 50+) and Essential Defense Broad Spectrum/PA++++ Sunscreens (Everyday Clear SPF 47, Mineral Shield Tinted SPF 32, and Mineral Shield SPF 35) are over-the-counter drug products that are formulated and marketed pursuant to the FDA's governing regulations set forth at 21 CFR § 352.
Two double-blind, placebo-controlled, randomized, multi-center, 24-week clinical studies were conducted in patients with OAB with symptoms of urge urinary incontinence, urgency, and frequency (Studies OAB -1 and OAB-2). Patients needed to have at least 3 urinary urgency incontinence episodes and at least 24 micturitions in 3 days to enter the studies. A total of 1105 patients, whose symptoms had not been adequately managed with anticholinergic therapy (inadequate response or intolerable side effects), were randomized to receive either 100 Units of BOTOX (n=557), or placebo (n=548). Patients received 20 injections of study drug (5 units of BOTOX or placebo) spaced approximately 1 cm apart into the detrusor muscle.
Table 14 presents the most frequently reported adverse reactions in a placebo-controlled, double-blind post-approval 52 week study with BOTOX 100 Units (Study NDO-3) conducted in MS patients with urinary incontinence due to detrusor overactivity associated with a neurologic condition. These patients were not adequately managed with at least one anticholinergic agent and not catheterized at baseline. The table below presents the most frequently reported adverse reactions within 12 weeks of injection.

The results usually start to be noticed within three to 10 days or even sooner. They tend to last in most people for up to three or four months. As time passes, the muscle activity will gradually return to normal. Additionally, other areas may return to activity over time, depending on the amount injected. The interesting thing about Botox is that it tends to work fairly well even up to the third month, as a procedure that might last a very short time at full strength and then go away quickly (filler injections such as Restylane, Perlane, or Juvederm tend to last approximately six to 12 months, depending on the amount used).
In recent years, a number of high-profile lawsuits have been brought against Allergan in which plaintiffs claimed that off-label uses--for ailments including a child's cerebral-palsy symptoms, for instance, or an adult's hand tremors--resulted in lasting deleterious side effects. Still, the drug's acceptance in a growing number of doctors' offices worldwide, and its revenue growth, show no signs of slowing.
As a plastic surgeon, it will never be a major source of income for me, so I choose to make it easy and affordable. We charge $13 per Botox unit. Having said that, though, we have a monthly day of beauty when Botox, facials, and peels are discounted - in the case of Botox, usually to $10 per unit. Currently, because we are welcoming a Nurse Practitioner to our Aesthetic Surgery Center, we are even offering Botox for $7 per unit!
Oral CareTeeth Whitening,Dental Floss & Gum Care...1187 Skin CareHair Removal,Cleanse,Skin Care Tools,Sun...7727 Men's Health & BeautyMen's Bath & Body,Men's Hair Care,Men's...4161 MassageFoot & Leg Massagers,Total Body Massager...2136 AromatherapyAccessories,Aromatherapy Sets,Essential...899 Shaving & GroomingShave Accessories,Hair Removal,Men's Sha...1297
How long the results from a Botox treatment last depends on the dosage and application. If Botox is too diluted and you don't get the proper units of Botox injected, the results might not last very long at all. If you get Botox for the wrong kind of wrinkles (i.e. static wrinkles) or an improper dose for your anatomy, you might not see much improvement either. In general, if the right amount of Botox is injected by a skilled doctor in the right muscles, Botox results can last 3-4 months.
Sharona Hoffman, professor of law and bioethics at Case Western Reserve University School of Law, says that step therapy is driven by a single motivator: saving costs. Hoffman, who’s written about the legal and ethical implications of step therapy, says that sometimes step therapy can have sensible outcomes, like pushing patients to take generics instead of brand-name drugs. But these policies can also keep doctors from prescribing the more expensive drugs of choice, forcing patients to take medications that are less effective or have worse side effects.
When pregnant rats received single intramuscular injections (1, 4, or 16 Units/kg) at three different periods of development (prior to implantation, implantation, or organogenesis), no adverse effects on fetal develop ment were observed. The developmental no-effect level for a single maternal dose in rats (16 Units/kg) is approximately 2 times the human dose of 400 Units, based on Units/k g.
Galli’s winning film presents herself, and people with migraine, as superheroes, living with a secret identity: migraine. “Other than me laying down on my couch, and knowing what's going on inside my body, nobody sees what's happening,” she says. “It's all happening inside. It's like that same struggle that superheroes have.” The migraine symptoms are superpowers, albeit ones that you don’t want. When her migraine attacks first began, Galli recalls an increased sensitivity to sound, odors, light and “all these things that feel not normal.” Many people with migraine are fighting the disease on their own, because their peers can’t relate to what their feeling on a daily basis. “It's time that we create better awareness and we tell the world that no, we don't need to be alone,” she says. “We don't need to fight alone and hide in the dark.” The film, she hopes, will add to the conversation and bring this disease out of the shadows. For the more than 37 million Americans living with migraine, Galli says: “You’re all superheroes. I hear you, I feel you.”
The last thing I've found to be a little frustrating is that my body tends to metabolize the Botox a bit faster than I can get it. While Ravitz tells me I can't get the treatment any more frequently than every three months, because that's the rate at which the body can develop antibodies against it, I find my migraines amping up in frequency again about two to two and a half months after I get the shots. However, given the fact that with the Botox, my migraines have gone down from about four a week to one or two at most, it's absolutely increased my quality of life, and I'm glad I gave it a shot...or 40.

Potential Botox side effects include pain at the injection site, infection, inflammation, swelling, redness, bleeding and bruising. Some of these symptoms may indicate an allergic reaction; other allergy symptoms are itching, wheezing, asthma, a rash, red welts, dizziness and faintness. Tell your doctor immediately if you have any breathing issues or a faint or dizzy feeling.
In 1986, Oculinum Inc, Scott's micromanufacturer and distributor of botulinum toxin, was unable to obtain product liability insurance, and could no longer supply the drug. As supplies became exhausted, patients who had come to rely on periodic injections became desperate. For 4 months, as liability issues were resolved, American blepharospasm patients traveled to Canadian eye centers for their injections.[48]
In a study to evaluate inadvertent peribladder administration, bladder stones were observed in 1 of 4 mal e monkeys that were injected with a total of 6.8 Units/kg divided into the prostatic urethra and proximal rectum (single administration). No bladder stones were observed in male or female monkeys following injection of up to 36 Units/kg (~12X the highest human bladder dose) directly to the bladder as either single or 4 repeat dose injections or in female rats for single injections up to 100 Units/kg (~33X the highest human bladder dose).
That said, there are a few things I'd make sure everyone knows before trying it. For one thing, it can be pretty painful. I have a pretty high pain tolerance, but getting 30 to 40 shots every three months is pretty rough — it feels a bit like getting tattooed with a bee's stinger, but once the needle is out of your skin, the pain goes away, and if it works for you, it's worth it. It's also important to know that it can take some time to work. The first treatment barely worked at all for me, and the second round took a few weeks. If you're going to try it out, be patient.

If you have eyelid drooping after a Botox procedure, it is a good idea to let the cosmetic surgeon know because there is a medicine available to help this condition. Any other difficulties, such as difficulty breathing or rashes, should be reported to the surgeon immediately. Bruises are generally gone within one to two weeks, there are other medications available for the treatment of these, such as vitamin K topical treatments (Dr. Holmquist Healthcare CytoActive Post-Procedural Bruise Relief, Revision Skincare Vitamin K Serum, Clinicians Complex Bruise Cream, Glymed Plus Arnica+ Healing Cream).


Unremarkable. I mean, that’s a good thing in the MRI-reading world, but I’d like to say my brain is freakin’ remarkable sometimes. Maybe I’m biased. Anyways. Shortly after those tests, the Botox arrived at the office and I was scheduled for my injections. To say I was scared is putting it lightly. Like I mentioned before, I have a complete irrational fear of new medication. Also, I didn’t want my face to look different! So I documented my wrinkles just to see how many would last (if you want, be my guest to check out my embarrassing video). I didn’t have to wait long and before I knew it, I was in a room with my mom, my boyfriend, a neurologist and three needles.
Even if Botox's mechanism isn't always well understood and some of its off-label uses are still unproven, interest in the drug isn't likely to wane. "Botox is a big cash cow for the physicians' practices," says Ronny Gal, an investment analyst at Sanford C. Bernstein who has watched the drug closely for more than a decade. "When I talk to physicians, they say, 'Botox is not a problem. It works and gives you the result you want.' If it works for depression and atrial fibrillation, it could be massive."
Some critics say Botox makes you lose all the personality from your face, leaving you with a significantly less range of motion when you laugh, or get angry or upset. While it’s true that your movement will be restricted, a moderate amount of Botox will still allow you to react and communicate in a lively way. “Botox relaxes the wrinkle-forming facial muscles at the sight of injection, such as crow’s feet, glabella (the ‘furrows’ in between the brows), and frontalis (forehead lines),” Dr. Waibel says. “Botox does not affect other facial muscles that are used for overall facial expressions.”
Vitamins & SupplementsVitamins,Protein,Sports Nutrition,Detox...4184 Hair CareStyling Tools,Kids Hair Care,Natural,Hai...6212 Personal CareEar, Nose & Throat Care,Body Treatments...3492 FragranceMen's Fragrance,Kids Fragrance,Women's F...15776 CosmeticsMakeup Palettes & Sets,Body,Brushes & Ap...9044 Sexual WellnessAdult Books,Men's Toys,Arousal & Massage...4260 Bath & BodyAromatherapy,Body Moisturizers,Body Scru...3298 Health CareHealth Monitors & Tests,Sleep Aids,Pain...5440
Strabismus is caused by imbalances in the actions of muscles that rotate the eyes, and can sometimes be relieved by weakening a muscle that pulls too strongly, or pulls against one that has been weakened by disease or trauma. Muscles weakened by toxin injection recover from paralysis after several months, so it might seem that injection would then need to be repeated. However, muscles adapt to the lengths at which they are chronically held,[18] so that if a paralyzed muscle is stretched by its antagonist, it grows longer, while the antagonist shortens, yielding a permanent effect. If there is good binocular vision, the brain mechanism of motor fusion, which aligns the eyes on a target visible to both, can stabilize the corrected alignment.
×