Posture and balance

Question 1

inputs to the CNS for balance

Answer 1

vestibular system
somatosensory system - proprioception
visual system

Question 2

semicircular canals

Answer 2

head rotation

Question 3

utricle and sacule

Answer 3

changes in force of gravity

as well as forces of linear acceleration

Question 4

vestibularcochlear nerve splits into what

Answer 4

vestibular branch and cochlear branch

Question 5

the vestibular branch is comprised of

Answer 5

utricular nerve
saccular nerve
ampullary nerve

Question 6

6 degrees of freedom

Answer 6

3 translational - x,y,z

3 rotational - roll, pitch and yaw

Question 7

What are the maculae?

Answer 7

Sensory detectors of the utricle and the saccule

Question 8

what causes hair cell distortion

Answer 8

matrix of supporting cells surround hair cells, which have calcium carbonate crystals which are heavy. Movement of this otolithic membrane sheers the hair cells

Question 9

hair cells are made of

Answer 9

kinocilium and many cilia

Question 10

hair cell tilts to the left causing

Answer 10

depolarisation -> increased firing

Question 11

hair cell tilts to the right causing

Answer 11

hyperpolarisation -> decreasing firing of sensory nerve

Question 12

slide 9

Answer 12

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