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Category of movement disorders. Not to be confused with Dyskinetic cerebral palsy. Dyskinesiarefers to a category of movement disordersthat are characterized by involuntary muscle movements,[1]including movements similar to ticsor choreaand diminished voluntary movements.[2] Dyskinesia can be anything from a slight tremor of the hands to an ...
Chorea. Chorea (or choreia, occasionally) is an abnormal involuntary movement disorder, characterized by quick movements of the hands or feet. It is one of a group of neurological disorders called dyskinesias. The term chorea is derived from the Ancient Greek: χορεία ("dance"; see choreia), as the movements of the body is comparable to ...
Tardive dyskinesia (TD) is an iatrogenic disorder that results in involuntary repetitive body movements, which may include grimacing, sticking out the tongue or smacking the lips, [1] which occurs following treatment with medication. [6][7] Additional motor symptoms include chorea or athetosis. [1] In about 20% of people with TD, the disorder ...
Since this system regulates posture and skeletal muscle tone, a result is the characteristic bradykinesia of Parkinson's. Tardive dyskinesia: involuntary muscle movements in the lower face and distal extremities; this can be a chronic condition associated with long-term use of antipsychotics. [2]
Movement disorders are clinical syndromes with either an excess of movement or a paucity of voluntary and involuntary movements, unrelated to weakness or spasticity. [ 1 ] Movement disorders present with extrapyramidal symptoms and are caused by basal ganglia disease. [ 2 ] Movement disorders are conventionally divided into two major categories ...
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 ...
Myoclonus. Myoclonus is a brief, involuntary, irregular (lacking rhythm) twitching of a muscle, a joint, or a group of muscles, different from clonus, which is rhythmic or regular. Myoclonus (myo- "muscle", clonus "spasm") describes a medical sign and, generally, is not a diagnosis of a disease. It belongs to the hyperkinetic movement disorders ...
In biology, a reflex, or reflex action, is an involuntary, unplanned sequence or action [1] and nearly instantaneous response to a stimulus. [2][3] The simplest reflex is initiated by a stimulus, which activates an afferent nerve. The signal is then passed to a response neuron, which generates a response. Reflexes are found with varying levels ...