Sensory and Motor Physiology

Question 1

What are sensory receptors?

Answer 1

Specialised cells

Stimuli converted to action potentials

Question 2

What are the 4 basic receptors?

Answer 2

Electromagnetic
Chemoreceptors
Mechanoreceptors
thermoreceptors

Question 3

What is a receptor field?

Answer 3

Area monitored by a single receptor

Question 4

What is a phasic response

Answer 4

Adapts rapidly - transient response

Question 5

What is a tonic response

Answer 5

Adapts slowly
AP maintained
Constant sensation

Question 6

What are the 3 different mechanoreceptors?

Answer 6

tactile receptors
propioreceptors
baroreceptors

Question 7

what is the role of tactile receptors

Answer 7

discriminate touch

Question 8

Where are tactile receptors located

Answer 8

Free nerve endings

meissners corpuslce

Question 9

Where are propioreceptors located?

Answer 9

Muscle spindle

Question 10

Role of baroreceptors?

Answer 10

monitor change in pressure

Question 11

Where are chemoreceptors located

Answer 11

Cardio/resp systems

GI tract

Question 12

What do chemoreceptors detect?

Answer 12

blood pH, O2, CO2

Question 13

Role of nocioreceptors

Answer 13

detect pain / harmful stimulus

Question 14

What is a dermatome

Answer 14

area of skin sensation associated with a particular spinal level

Question 15

What are first order neurones

Answer 15

have receptor endings

bigger diameters- quicker conduction

Question 16

What does the spinothalamic tract regulate

Answer 16

Pain/temp

Question 17

Location of spinothalamic tract

Answer 17

synapse in thalamus

travel to sensory cortex

Question 18

What happens when spinothalamic tract is damaged

Answer 18

Bilateral sensation lost to both sides lost at the level below

Question 19

What is the dorsal column responsible for

Answer 19

Touch/vibration

Question 20

Where does the dorsal column synapse?

Answer 20

Not in spine

Synapses in dorsal column nuclei

Question 21

Where does the spinocerebellar tract originate

Answer 21

Spinal cord

Question 22

What is present on the spinocerebellar tract

Answer 22

Propioceptors

Question 23

What does damage to the somatosensory cortex cause

Answer 23

Stroke

Question 24

What does the primary sensory cortex do

Answer 24

receive information from sensory receptors

Conscious awareness of sensations

Question 25

What do somatic sensory association areas do?

Answer 25

Monitors activity in primary sensory cortex
allows special recognition of somatic areas
special senses have own association areas