The mechanical senses

Question 1

VESTIBULAR SENSE

Answer 1

Detects the direction of tilt and the amount of acceleration of the head (balance).

Question 2

vestibular organ

Answer 2

Structures include (1) the 3 semicircular canals (fluid filled with hair cells), and (2) two otolith organs (the saccule and utricle)

Question 3

SOMATOSENSATION

Answer 3

sensations from the body and its movement – includes discriminative touch, deep pressure, cold, warmth, pain, tickle and the position and movement of the joints (kinesthetic).

Question 4

Pacinian Corpuscle

Answer 4

a somatosensory receptor that detects sudden displacements or high-frequency vibrations on the skin

Question 5

Merkel disks

Answer 5

respond to light touch.

Question 6

Dermatomes

Answer 6

areas of the body innervated by the spinal nerves (see figs. 7.13 & 7.14)
Cervical-(8 pairs)
Thoracic-(12pairs)
Lumbar-(5pair)
Sacral-(5pairs)
Coccygeal-(1pair)