Interposed nucleus

From Wikipedia, the free encyclopedia

The interposed nucleus is a deep nucleus of the cerebellum, and is comprised of the globose nuclei and the emboliform nuclei. It is located in in the roof (dorsal aspect) of the fourth ventricle, lateral to the fastigial nucleus. It receives its afferent supply from the anterior lobe of the cerebellum and sends output via the superior cerebellar peduncle to the red nucleus.

[edit] Function

Functionally, it modulates muscle stretch reflexes of distal muscle groups.

[edit] External links

• http://www.lib.mcg.edu/edu/eshuphysio/program/section8/8ch6/s8ch6_30.htm
• http://www.neuroanatomy.wisc.edu/cere/text/P5/interp.htm

v • d • e Brain: Metencephalon/rhombencephalon - cerebellum (hindbrain) Regions Posterior lobe (Horizontal fissure) • Anterior lobe • Flocculonodular lobe (Flocculus, Nodule) Vermis: posterior (Folium, Tuber, Uvula) - anterior (Central lobule, Culmen, Lingula) Hemisphere: posterior (Biventer lobule, Cerebellar tonsil) - anterior (Alar central lobule) white: Arbor vitae Vallecula of cerebellum - Primary fissure Layers Molecular layer (Stellate cell, Basket cell) Purkinje cell layer (Purkinje cell) Granule cell layer (Golgi cell, Granule cell) Fibers: Mossy fibers • Climbing fiber • Parallel fiber Deep cerebellar nuclei Dentate - interposed (Emboliform, Globose) - Fastigial Peduncles Inferior (medulla): Dorsal spinocerebellar tract - Olivocerebellar tract - Cuneocerebellar tract - Juxtarestiform body (Vestibulocerebellar tract) Middle (pons): Pontocerebellar fibers Superior (midbrain): Ventral spinocerebellar tract - Dentatothalamic tract - Trigeminocerebellar fibers