Lecture 20: The Somatosensory System 1

Question 1

what are the 9 senses?

Answer 1

sight
 hearing		  
 olfaction
 gustation
 vestibular sense of equilibrium
 touch
pain
sense of body position (proprioception) 
sense of temperature

Question 2

what are the 4 somatic sensations?

Answer 2

touch
pain
sense of body position (proprioception)
sense of temperature

Question 3

which 2 pathways always work together?

Answer 3

pain and temperature

Question 4

what involved in the sensation of touch?

Answer 4

discriminative touch, texture, pressure & vibration

Question 5

what are the features of peripheral receptors?

Answer 5

• rapidly and slowly adapting
• having small and large receptive fields
• encapsulated and free nerve endings

Question 6

what’s the two fibres for pain and temperature?

Answer 6

As andC

Question 7

what are Nociceptors activated by?

Answer 7

stimuli that lead to tissue damage

Question 8

what are Nociceptors ?

Answer 8

Strong mechanical stimulation
Extreme temperature
Oxygen deprivation
Exposure to certain chemicals

Question 9

How many spinal nerves are there?

Answer 9

31

Question 10

each pair of spinal nerves have _____ and ____ components

Answer 10

sensory and motor

Question 11

what is dermatome ?

Answer 11

Part of the body innovated by a pair of spinal nerves

Question 12

what is the fast pathway known as ?

Answer 12

dorsal column nuclei pathway, involved in touch.

Question 13

what is the slow pathway know as?

Answer 13

spinothalamic pathway

pain, temperature

Question 14

what do Proprioceptive pathways invovle?

Answer 14

dorsal column nuclei

pathway and spino-cerebellar pathway

Question 15

what’s the unconscious pathway ?

Answer 15

Spino-cerebellar tracts

Question 16

do Spino-cerebellar tracts cross?

Answer 16

no ( no one knows why they don’t )

Question 17

what nerve is involved from neural pathways from the face?

Answer 17

trigeminal enrve

Question 18

what is pons involved with?

Answer 18

touch

Question 19

what is proprioception information delivered too?

Answer 19

midbrain