2014 Inner Ear Physiology

VESTIBULOSPINAL PATHWAYS & FUNCTIONS

Critical Fact Icon
LATERAL VESTIBULOSPINAL TRACT (LVST)
MEDIAL VESTIBULOSPINAL TRACT (MVST)
AFFERENT SOURCE
  • entire labyrinth
    (motion and gravity)
  • semicircular canals
    (motion)
VESTIBULAR NUCLEUS
see Dr. Forbes lectures
  • lateral vestibular (Dieter's nucleus) to medial aspects of laminae VII and VIII
  • medial and descending vestibular nuclei to MLF
EFFERENT CONNECTIONS
  • ipsilateral
  • bilateral
EFFERENT EFFECT
  • excitatory
  • excitatory and inhibitory
  • adjustment of limb and trunk musculature by:
    1. contraction of extensor muscles
    2. indirect relaxation of flexor muscles
  • relaxation of muscles of upper back and neck

IT IS UNDOUBTEDLY MUCH MORE COMPLICATED THAN THIS!!!

 

Email: Dr. Janet Fitzakerley | ©2014 University of Minnesota Medical School Duluth | Last modified: 15-feb-14 9:04 PM