Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Vestibular System
Audiology Exam 1
| Question | Answer |
|---|---|
| What are the four parts to balance? | Visual system, proprioceptive system, vestibular system, and brain to interpret movement |
| What are the two primary parts of the vestibular system? | Semi-circular canals, utricle and saccule |
| The vestibular system holds which two fluids? | Endolymph and perilymph |
| What are the three different canals? | Anterior, posterior, and horizontal |
| What is the function of the semi-circular canals? | Responsible for angular movements |
| Ampulla | The dilated end of a duct |
| The vestibular Semi-Circular Canals have ______ Ampulla which house the sensory organs | 3 |
| Where is the copula located? | Each semi-circular canal ampullae |
| What does the copula do? | Fluid movement caused by rotation movements activate mechanically gated channels (similar to cochlea hair cells) |
| What are the primary functions of the utricle and saccule? | Linear movements |
| Macula (Otolith Organs) | Hair cell cilia are held in gelatinous material with otoliths on top. |
| What happens with the macula (otolith organs)? | With acceleration the weight of otoliths pulls gelatinous material- which in turn opens mechanically gated channels in hair cells |
| The __________ are oriented in opposite directions on either side of the ___________ in each sensory organ | Kinocilia, striola |
| Striola | a curved dividing ridge that runs through the Center of the Macula organs |
| The utricle and saccule function allows for what? | Sensory cells to detect movement in two directions |
| The utricle lies nearly __________ and stereocilia are oriented ____________ | Horizontal, vertically |
| The utricle detects what kind of movement? | Forward and backward |
| The saccule lies nearly _________ and the stereocilia are oriented ____________ | Vertical, horizontally |
| The saccule detects what kind of movement? | Upward and downward |
| How are the utricle and saccule able to detect all linear movements? | The combination of different hair cell orientations and opposite direction of Kinocilia pointing towards Striola allow for this |
| Name the order of the central vestibular system: | 1- Vestibulocochlear Nerve (8th cranial nerve) 2- Vestibular Nuclues 3- Occulomotor Pathway > Vestibular Occular Reflex 4- Vestibulosponal Pathway |
| The vestibular ocular reflex activates ________ when the vestibular system is activated | Eye muscles |
| The vestibular ocular reflex allows for? | Stable visual field for constant head movement |
| Audiologists utilize _________________ to measure the vestibular system | Vestibular ocular reflex |
| One common sign of a dysfunctional vestibular system is | Nystagmus |
| Nystagmus | When the eyes make rapid, uncontrolled movements |
Created by:
RachelJClark
Popular Science sets