ganglion and such - Fasciculus Gracilis: White Matter in...

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Fasciculus Gracilis: White Matter in dorsal side of spinal cord Medial to fasciculus cuneatus Part of Dorsal (column) faniculus along with Fasciculus Cuneatus Extends up to medulla => nucleus Gracilis is in medulla Ascending sensory axons carrying conscious perception of most mechanical stimuli Found in motor decussation slice of medulla (lowest slice) Nucleus Gracilis: Integration Center/ Relay Center for ascending Gracilis axons Integrates conscious perception of most mech. Stimuli Relays fibers (along with relay fibers from Nucleus Cuneatus) that decussate to form the medial lemniscus on the contralateral side Found in lower medulla Fasciculus Cuneatus => White Matter in dorsal side of spinal cord Lateral to fasciculus gracicils Extends up to medulla where its nucleus is Same function of fasciculs gracilis Ends is sensory decussation of medulla to the medial lemnisus Nucleus Cuneatus => Same Function as Nucleus Gracilis Ends at mid medulla Relays fibers (along with relay fibers from Nucleus Cuneatus) that decussate to form the medial lemniscus on the contralateral side Analogous in morphology and function to the dorsal nucleus of Clark in the spinal cord Anterolateral System => Ascending axons about pain and temp to the thalamus Found throughout spinal cord and brain stem Spinal cord- part of lateral funiculus Brain stem- usually associated with medial and lateral lemnsicus in the pons and midbrain Spinocerebellar Tract => Ascending axons in white matter of spinal cord about muscle and joints 2 of them: Both end in motor decussation of medulla Dorsal Spinocerebellar: Feeds into inferior cerebellar peduncle Ventral Spinocerebellar: Feeds into middle and inferior cerebellar peduncle
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Corticospinal Tract => Control of motor movements, especially of the limbs => Descending axons the white matter of the spinal cord 2 of them Lateral corticospinal Tract Anterior Corticospinal Tract Both will come from pyramids (Originally single corticospinal tract in the Pons) Pyramids => Contain descending motor tracts Gets axons from corticospinal tract in the Pons (surrounded by pontine nuclei) Axons will become lateral and anterior corticospinal tract in spinal cord Only in anterior medulla Decussating fibers in lower medulla are called Internal Arcuate Fibers Nucleus/Tractus Solitarius => Found in medulla Relay center for visceral sensory info from VII, IX, and X Cuadal nucleus solitarius relays info from caudal GI: Rectum/ Colon Rostral nucleus relays info from rostral GI: Taste Most information goes from the solitary nucleus to the hypothalamus and cingulate gyrus , as well as to other nuclei in the brainstem (such as visceral motor or respiratory centers). Cranial Nerve V Nucleus and Tracts =>
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ganglion and such - Fasciculus Gracilis: White Matter in...

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