Human Anatomy and Histology · MU Plovdiv

75. Internal ear. The membranous labyrinth - vestibular part. Organ of equilibrium. Vestibular nerve. Pathway of equilibrium.

Inside: 5 sections · 3 labelled pictures · 1 table · 10 flashcards · 1 min

Topic 116 of 212 in the MU Plovdiv syllabus for Human Anatomy and Histology (Medicine, Years 1 and 2). The free AceMed note covers it in 5 sections, about 122 words (1 min of reading), with 10 flashcards.

In this note

  1. Vestibular pathway:
  2. Peripheral Vestibular System:
  3. Pathway
  4. Vestibular nuclei complex:
  5. Connections of the vestibular nuclei:

Vestibular pathway:

  • The vestibular pathway is responsible for processing related to balance, spatial orientation, & head movement.
  • The vestibular system consists of both central & peripheral componants.

Peripheral Vestibular System:

  • Semicircular Canals: 3 fluid-filled canals within the inner ear, that detect rotational movements of the head.
  • Utricle & Saccule: within the inner ear, that detect linear accelerations & head position relative to gravity.

Pathway

  1. (1) Inner ear
  2. (2) Vestibular ganglion
  3. (3) Internal acustic meatus ← with cochlear br. + facial nerve.
  4. (4) Vestibular nuclei within the medulla

Connections of the vestibular nuclei:

4 connections:

  1. With the spinal cord (medial & lateral nuclei)
  2. " " cerebellum through the inferior cerebllar Peducle.
  3. with other brainstem nuclei (eye movement nuclei)
  4. " " thalamus.
  • vestibular n.
  • thalamus
  • spinal cord
  • lat. & Ant.
  • cerebellum
  • folleculonodula
  • oclumotor n.s
  • medial

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