Extrapyramidal Motor Systems_08

Extrapyramidal Motor Systems_08 - Vestibulospinal Tracts...

Info iconThis preview shows pages 1–16. Sign up to view the full content.

View Full Document Right Arrow Icon
Extrapyramidal System Extrapyramidal Cortex Basal Ganglia Substantia Niagra Subthalamic Nucleus Red Nucleus Reticular Formation Vestibulospinal Tracts
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Rubrospinal Tract Originates from the magnocellular part of the red nucleus in the tegmentum of the mesencephalon beneath the superior colliculus Crosses in the midbrain and descends in the contralateral brainstem Somatotopic organization
Background image of page 2
Rubrospinal Tract Terminates primarily in the cervical cord Excitatory to flexor motorneurons Inhibitory to extensor motorneurons Afferents Corticorubral Cerebellorubral Dentate and Interpositus n.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Reticulospinal Tracts Lateral reticulospinal tract Originates in the medullary RF Crossed and uncrossed Medial reticulospinal tract Originates from the pontine RF Uncrossed Posture – γMN input Visceral Functions: respiration, vasomotor
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 12
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 14
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 16
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Vestibulospinal Tracts • Lateral vestibulospinal tract • Medial vestibulospinal tract • Ipsilateral • Axial and proximal muscles • Important for posture Basal Ganglia • Caudate – neostriatum • Putamen – neostriatum • Globus Pallidus – paleostriatum, outflow nucleus • Automatic Patterned Movement Parkinsonism • Disease of substantia nigra • Symptoms: cogwheel rigidity, bradykinesia, resting tremor, expressionless face, slow speech • Treatment: L-Dopa, mestanon Chorea • Diseased caudate • Sydenham’s Chorea: post streptococcal • Huntington’s Chorea: autosomal dominant Athetosis • Diseases of the putamen Hemiballismus • Hemorrhage in the subthalamic nucleus • Violent, forceful, uncontrolled movements of the contralateral limb and proximal musculature...
View Full Document

This note was uploaded on 09/28/2009 for the course BME 365R taught by Professor Rylander during the Fall '09 term at University of Texas.

Page1 / 16

Extrapyramidal Motor Systems_08 - Vestibulospinal Tracts...

This preview shows document pages 1 - 16. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online