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Spasmodic dysphonia: A dystonia of the vocal cords. The complications surrounding this form of dystonia are speech-related and can cause symptoms such as speech that wavers, speech that sounds like a whisper, or speech that is hesitant. Writer's cramp (occupational dystonia): A dystonia that affects the muscles of the hand and forearm. It is ...
Primary dystonia is suspected when the dystonia is the only sign and there is no identifiable cause or structural abnormality in the central nervous system. Researchers suspect it is caused by a pathology of the central nervous system , likely originating in those parts of the brain concerned with motor function—such as the basal ganglia and ...
Torsin-1A (TorA) also known as dystonia 1 protein (DYT1) is a protein that in humans is encoded by the TOR1A gene (also known as DQ2 or DYT1). [5] TorA localizes to the endoplasmic reticulum and contiguous perinuclear space , where its ATPase activity is activated by either LULL1 or LAP1 , respectively.
Medications are used to reverse the symptoms of extrapyramidal side effects caused by antipsychotics or other drugs, by either directly or indirectly increasing dopaminergic neurotransmission. The treatment varies by the type of the EPS, but may involve anticholinergic agents such as procyclidine, benztropine, diphenhydramine, and trihexyphenidyl.
The primary disorder is benign essential blepharospasm, in which term the qualifier essential indicates that the cause is unknown. Blepharospasm may occur as secondary to conditions including dry eyes and other specific ocular disease or conditions, Meige's syndrome and other forms of dystonia, and Parkinson's disease and other movement ...
Dystonia is a disorder of involuntary muscle contractions that may cause repetitive and/or abnormal movement or postures. Dystonia is a disorder that causes repetitive involuntary muscle movements ...
Myoclonic dystonia or Myoclonus dystonia syndrome is a rare movement disorder that induces spontaneous muscle contraction causing abnormal posture. The prevalence of myoclonus dystonia has not been reported, however, this disorder falls under the umbrella of movement disorders which affect thousands worldwide. [1]
In the past, dopamine blocking agents have been used in the treatment of spasmodic torticollis. Treatment was based on the theory that there is an imbalance of the neurotransmitter dopamine in the basal ganglia. These drugs have fallen out of fashion due to various serious side effects: sedation, parkinsonism, and tardive dyskinesia. [16]