vestibular system

Question 1

functions of the vestibular system?

Answer 1

• maintain balance
• influences how we perceive space and our external environment by measuring linear and angular acceleration of head and effects of gravity.
• controls reflex eye movements.

Question 2

Linear and angular acceleration of head is measured by what?

Answer 2

5 sensory organs within the vestibular labyrinth.

Question 3

what are the 5 vestibular sensory organs?

Answer 3

1. utricle.
2. saccule.
3. anterior vertical canal.
4. posterior vertical canal.
5. horizontal canal.

Question 4

what does the utricle do?

Answer 4

responds to changes in head motion (linear acceleration) in the horizontal plane and tilting of head.

Question 5

what does the saccule do?

Answer 5

responds to changes in head motion (linear accel) in vertical plane and head tilting.

Question 6

what do the 3 semicircular canals do?

Answer 6

respond to head rotation (angular accel) in all planes

Question 7

what are the 3 semicircular canals?

Answer 7

1. anterior vertical canal.
2. posterior vertical canal.
3. horizontal canal.

Question 8

what so Vestibulo-ocular reflexes do?

Answer 8

ensure that the image of an object is kept stationary on the retina when the head moves.