Extrapyramidal system

Extrapyramidal system
That part of the nervous system that regulates muscle reflexes.

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the system of nerve tracts and pathways connecting the cerebral cortex, basal ganglia, thalamus, cerebellum, reticular formation, and spinal neurones in complex circuits not included in the pyramidal system. The extrapyramidal system is mainly concerned with the regulation of stereotyped reflex muscular movements.

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an imprecise term referring to a functional rather than an anatomical part of the central nervous system that controls motor activities and is not part of the pyramidal tract; it includes the corpus striatum, subthalamic nucleus, substantia nigra, and red nucleus along with their interconnections with the reticular formation, cerebrum, and cerebellum; they control and coordinate especially the postural, static, supporting, and locomotor mechanisms. Since the term is imprecise and applies literally to all structures outside the corticospinal system, it has largely fallen into disuse. Called also extracorticospinal s. or tract and extrapyramidal tract.

Medical dictionary. 2011.

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  • Extrapyramidal system — Infobox Brain Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Medulla spinalis. (Extrapyramidal tracts are labeled 2 in red, at left.) Caption2 = IsPartOf = Components = Artery = Vein = BrainInfoType = ancil BrainInfoNumber = 623… …   Wikipedia

  • extrapyramidal system — the system of nerve tracts and pathways connecting the cerebral cortex, basal ganglia, thalamus, cerebellum, reticular formation, and spinal neurones in complex circuits not included in the pyramidal system. The extrapyramidal system is mainly… …   The new mediacal dictionary

  • extrapyramidal system — Anat. the part of the central nervous system, including the descending motor fibers other than those of the pyramidal tract, that regulates muscle tone, posture, and other aspects of body movement. [1960 65] * * * …   Universalium

  • extrapyramidal system — Anat. the part of the central nervous system, including the descending motor fibers other than those of the pyramidal tract, that regulates muscle tone, posture, and other aspects of body movement. [1960 65] …   Useful english dictionary

  • extrapyramidal syndrome — any of a group of clinical disorders considered to be due to malfunction in the extrapyramidal system and characterized by abnormal involuntary movements; included are parkinsonism, athetosis, and chorea …   Medical dictionary

  • extrapyramidal effects — symptoms caused by a reduction of dopamine activity in the extrapyramidal system due to the adverse effects of dopamine receptor antagonists, notably phenothiazine antipsychotic drugs. These effects include parkinsonism, akathisia, and dyskinesia …   The new mediacal dictionary

  • extrapyramidal — extrapyramidal,   außerhalb der Pyramidenbahn des Nervensystems gelegen. Das extrapyramidale (extrapyramidalmotorische) System im Mittel und Zwischenhirn reguliert den Muskeltonus und ermöglicht die Ausführung geordneter Muskelbewegungen …   Universal-Lexikon

  • Extrapyramidal Side Effects —    (EPS)     Extrapyramidal means the tracts of the spinal cord involved in the involuntary movement of muscles: the pyramidal tract is for voluntary movement; iatrogenic means medically caused. Iatrogenic symptoms such as shuffling gait; tremor… …   Historical dictionary of Psychiatry

  • Extrapyramidal-motorisch — Das Extrapyramidalmotorische System (EPS) ist ein neuroanatomisches und physiologisches Konzept, in dem sich alle Steuerungsvorgänge der Bewegung (Motorik) wiederfinden, die nicht über die Pyramidenbahn des pyramidalen Systems verlaufen. Dieses… …   Deutsch Wikipedia

  • Extrapyramidal-motorische Störung — Das Extrapyramidalmotorische System (EPS) ist ein neuroanatomisches und physiologisches Konzept, in dem sich alle Steuerungsvorgänge der Bewegung (Motorik) wiederfinden, die nicht über die Pyramidenbahn des pyramidalen Systems verlaufen. Dieses… …   Deutsch Wikipedia

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