Sensory Receptors and CNS Pathways Flashcards Preview

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Flashcards in Sensory Receptors and CNS Pathways Deck (12):
0

What are the five cutaneous skin receptors?

Meissener's corpuscles, Ruffini's corpuscles, merkells discs, pacinian corpuscles and free nerve endings

1

Which type of skin receptors has a looping axon terminal I'm supporting glial?

Meisseners

2

Which skin receptor has an onion appearance?

Pacinian corpuscle

3

What are most nociceptors and where are they found?

Polymodal and in the periphery as free nerve endings

4

Give the four steps of how sensory receptors work?

Stimulus deforms the shape of the nerve ending, altering the membrane permeability, producing a receptor generating potential, causing an action potential to the CNS.

5

What receptors detect a) pain, b) touch and c) temperature?

A) nociceptors
B) tactile sensory receptors
C) thermoreceptors

6

Describe the 3 neurochain mechanosensory pathway?

1st is primary afferent, into the dorsal horns and spinal cord, 2nd central neurones goes to the thalamus and 3rd goes to the cortex.

7

Which skin receptor has a brain like appearance?

Merkels discs

8

What are long/small diameter and rapid/slow conducting afferent associated with?

Large/rapid= mechanoreceptors and small and slow= nociceptors and thermoreceptors

9

How is the pain and temperature pathway different to the mechanosensory pathway?

Synapses in the spinal cord, 1-2, and crosses in the medulla. Whereas mechanosensory synapses in the medulla, 1-2, but crosses in spinal cord.

10

What do somatosensory and viscerosensory systems respond to?

Somatosensory respond to the external environment and viscerosensory responds the internal environment.

11

Which skin receptor has nerve terminals intertwined with collagen fibrils?

Ruffini's