Somatosensory Disorders

Question 1

What are examples of tactile receptors?

Answer 1

Low threshold mechanoreceptors - Merkel’s, Pacinian, Ruffini etc.

Question 2

What is the location of:
A) Meissner's 
B) Merkels 
C) Pacinian corpuscles
D) Ruffini endings

Answer 2

A) Between papillae
B) Aligned with papillae
C) Subcutaneous Tissue
D) Deep in dermis, axis parallel to skin

Question 3

What are the function of:
A) Pacinian
B) Merkels
C) Meissners
D) Ruffini

Answer 3

A) Vibration
B) Pressure, deep touch, texture
C) Fine touch
D) Stretch

Question 4

Noxious heat and noxious cold activate what class of receptors?

Answer 4

Trp
Menthol - TrpM8 - (Are you tripping mate, i don’t want a menthol filter)
Capsaicin (in peppers) - TrpV1

Question 5

What is the function of the secondary somatosensory cortex?

Answer 5

Sensory and motor integration

Question 6

From where does the secondary somatosensory cortex receive inputs from to form a joined up body image?

Answer 6

Corpus callosum

Question 7

What is at the posterior parietal cortex ?

Answer 7

Sensory association cortex

Question 8

What is agnosia?

Answer 8

Can’t recognise an object

Question 9

What is neglect?

Answer 9

Disregard body part/visual field due to right hemisphere damage.

Question 10

What is astereoagnosia?

Answer 10

Cant identify objects on touch alone