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Neurology. Extrapyramidal symptoms (EPS) are symptoms that are archetypically associated with the extrapyramidal system of the brain's cerebral cortex. When such symptoms are caused by medications or other drugs, they are also known as extrapyramidal side effects (EPSE). The symptoms can be acute (short-term) or chronic (long-term).
In anatomy, the extrapyramidal system is a part of the motor system network causing involuntary actions. [ 1 ] The system is called extrapyramidal to distinguish it from the tracts of the motor cortex that reach their targets by traveling through the pyramids of the medulla. The pyramidal tracts (corticospinal tract and corticobulbar tracts ...
Akathisia (IPA: /æ.kə.ˈθɪ.si.ə/) is a movement disorder [5] characterized by a subjective feeling of inner restlessness accompanied by mental distress and/or an inability to sit still. [6][4] Usually, the legs are most prominently affected. [2] Those affected may fidget, rock back and forth, or pace, [7] while some may just have an uneasy ...
Oculogyric crisis. Oculogyric crisis (OGC) is a rare sudden, paroxysmal, dystonic reaction that may manifest in response to specific drugs, particularly neuroleptics, or medical conditions, such as movement disorders. This neurological phenomenon is characterized by a sustained dystonic, conjugate, involuntary upward deviation of both eyes ...
Catatonia is a complex neuropsychiatric behavioral syndrome that is characterized by abnormal movements, immobility, abnormal behaviors, and withdrawal. [2][3] The onset of catatonia can be acute or subtle and symptoms can wax, wane, or change during episodes. It has historically been related to schizophrenia (catatonic schizophrenia), but ...
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 ...
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 ...
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 ...