1. Equilibrium
By: Hannah Wade, Gabby Ingram, Sydney Little, Bobby Porter, and Hayley Kilburn

2. Inner Ear anatomy recap
Semicircular Canals - three fluid-filled bony channels in the inner ear.
Otoliths - involved in sensing gravity and movement.
Vestibule – middle part of inner ear, contains saccule and utricle.

3. Static vs. Dynamic Equilibrium
Detects vertical or horizontal acceleration
Senses head position, and maintains stability and posture
Utricle and saccule within the vestibule
Dynamic
Detects rotational movement
Maintains balance
Semicircular canals

4. Receptors Static Maculae
Sense the movement of hair cells to detect movements of the otolithic membrane.
Dynamic
Crista ampullaris
Sense the movement of hair cells to detect movements in the semicircular canal.

5. Stimulus-Response Pathway
Head movement causes otoliths to pool
Receptors sense movement of specialized hairs
Vestibular branch of vestibulocochlear nerve
Motor impulses sent to maintain balance

6. Stimulus-Response Pathway Continued

7. Sources
The Editors of Encyclopædia Britannica. (n.d.). Inner ear. Retrieved April 21, 2016, from
Moresea PowerPoint
(n.d.). Retrieved April 21, 2016, from webster.com/medical/vestibule