Equilibrium Pathway to the Brain

Question 0

In order to respond reflexively, what is the efferent pathway?

Answer 0

Extrinsic eye muscle control (III, IV, VI)

Accessory nerve and vestibulotract for neck movements (position of the head).

Question 1

In order to respond to something reflexively and quickly how did the equilibrium impulse travel?

Answer 1

Directly to the reflex centers:

• vestibular nuclei in the brain stem
• cerebellum

**both receive inputs from visual receptors & Proprioceptors

Question 2

What are 3 types of equilibrium dysfunctions?

Answer 2

1. Meniere’s syndrome
2. Nystagmus
3. BPPV

Question 3

What is Meniere’s syndrome?

Answer 3

Labyrinth disorder that affects both the cochlea & semicircular canals = vertigo, nausea, vomiting

Question 4

What is Nystagmus?

Answer 4

The rapid beating if the eyes following rapid & repeated rotatory movements.

*vestibular system thinks you’re still moving

Question 5

What is BPPV?

Answer 5

Benign Paroxymal Positional Vertigo

Loose otoliths enter the semicircular canal.