Vestibular System

Question 1

Vestibular nuclei:

Lateral

Answer 1

Lateral vestibulospinal tract
Utricle and saccule
Concerned with posture (extensor groups)

Question 2

Vestibular nuclei:

Medial

Answer 2

Ascending MLF (medial longitudinal fasciculi) - oculomotor fibers

Also descending MLF (bilateral?)

Question 3

Vestibular pathway:

Lateral Vestibulospinal Tract

Answer 3

From lateral vestibular nucleus
Uncrossed
Entire length of cord: ventral funiculus
Proximal limb muscles

Question 4

Vestibular pathway:

Medial Vestibulospinal tract

Answer 4

"Descending MLF"
FromMedial vestibular nucleus
Bilateral projection
Cervical spinal cord ONLY
Neck muscles
Maintains head erect

Question 5

Vestibular Pathway:

Primary Afferents

Answer 5

Vestibular nuclei

Flocculonodular lobe

Question 6

Vestibular Pathway:

Secondary Connections - Cerebellum

Answer 6

Flocculonodular lobe
Cerebellar vermis
Fastigial nucleus

Question 7

Vestibular Pathway:

Secondary Connections - Spinal cord

Answer 7

Lateral and medial vestibulospinal tract

Question 8

Vestibular Pathway:

Secondary Connections - Brainstem

Answer 8

Ascending MLF
Reticular formation
Vestibular commisural connections

Question 9

Vestibular Pathway:

Secondary Connections - Thalamic and cortical areas

Answer 9

Merp.