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For example, in focal hand dystonia, or writer's cramp, the fingers either curl into the palm or extend outward without control. In musicians, the condition is called musician's focal dystonia, or simply, musician's dystonia. In sports, it may be involved in what is commonly referred to as the yips. The condition appears to be associated with ...
Writer's cramp is a task-specific focal dystonia of the hand. [4] 'Focal' refers to the symptoms being limited to one location (the hand in this case), and 'task-specific' means that symptoms first occur only when the individual engages in a particular activity.
Dystonia is often intensified or exacerbated by physical activity, and symptoms may progress into adjacent muscles. [ 4 ] The disorder may be hereditary or caused by other factors such as birth-related or other physical trauma , infection , poisoning (e.g., lead poisoning ) or reaction to pharmaceutical drugs , particularly neuroleptics , [ 3 ...
The main symptom of benign fasciculation syndrome is focal or widespread involuntary muscle activity (fasciculation). [1] The benign twitches usually have a constant location. [2] Other common symptoms are generalized fatigue or weakness, paraesthesia or numbness, and muscle cramping or spasms. [1]
Paroxysmal symptoms include tonic, tonic–clonic, or myoclonic limb movements, [8] dystonic posturing, choreoathetosis, ocular nystagmus, and various other ocular motor abnormalities. [1] [6] Almost half of all people have dystonic symptoms prior to experiencing hemiplegia. [4] These symptoms generally begin before 8 months of age. [8]
Paroxysmal kinesigenic dyskinesia (PKD), also called paroxysmal kinesigenic choreoathetosis (PKC), is a rare hyperkinetic movement disorder of the paroxysmal dyskinesias characterized by attacks of involuntary movements, which are triggered by sudden voluntary movements.
Spasmodic dysphonia, also known as laryngeal dystonia, is a disorder in which the muscles that generate a person's voice go into periods of spasm. [ 1 ] [ 2 ] This results in breaks or interruptions in the voice, often every few sentences, which can make a person difficult to understand. [ 1 ]
Focal hand dystonia is associated with abnormal processing in the premotor and primary sensorimotor cortices. An fMRI study examined five guitarists with focal hand dystonia. [88] The study reproduced task-specific hand dystonia by having guitarists use a real guitar neck inside the scanner as well as performing a guitar exercise to trigger ...
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