sensation

Question 1

nociceptors

Answer 1

pain receptor

Question 2

thermoreceptors

Answer 2

temperature receptors

Question 3

chemoreceptors

Answer 3

respond to water-soluble and lipid-soluble substances disloved in water

Question 4

mechanoreceptors

Answer 4

sensitive to stimuli that distort their plasma membranes

pressure

Question 5

myelinated type a fibres

Answer 5

carry pain sensation fast

Question 6

unmyelinated type c fibres

Answer 6

carry pain sensation slow

Question 7

muscle spindles

Answer 7

are sensory receptor (mechanoreceptor) in skeletal muscle belly

respond to muscle stretch

Question 8

golgi tendon organ

Answer 8

found in tendons

detect force/ muscle tension generated during a muscle contraction

Question 9

joint receptor

Answer 9

respond to mechanical deformation of joint capsule and ligaments

Question 10

large diameter fibres

Answer 10

course of touch, pressure, fine/light touch, proprioception

Question 11

small dimaeter

Answer 11

pain and tempaerature

Question 12

large receptive field

Answer 12

low sensitivity

Question 13

small receptive field

Answer 13

low sensitivity

Question 14

afferent information gets to the spinal chord via

Answer 14

dorsal root ganglion

Question 15

primary samotsensory cortex

Answer 15

located in post central gyrus
in parital lobe

sensory information is inturpreted here

Question 16

secondary somatosensory cortex

Answer 16

lower prital lobe

responds to stimuli bilaterally with much less precision

Question 17

somatosensory association cortex

Answer 17

directly posterior to somatosensory cortex

reciveces connections from both areas
involved in complex associations

Question 18

concious relay tract

Answer 18

transmit info about location and type of stimuli with high fedielity

high levels and accurate info
allows discrimination of info
3- chain set of neurons

Question 19

3 neurons of the concious relay tract

Answer 19

1st
cell body in dorsal root ganglion// one axon connected to sensory organ and the other travels into spinal chord

2nd neuron
cell body in the spinal chord goes to the thalamus

3rd neuron
cell body in the thalamus travels to the primary sensory cortex

Question 20

dorsal column -/ medial lemniscus tract

Answer 20

axon conveys light touch signals

Question 21

anterolateral spinothalamic tract

Answer 21

axon convey signals of pain

Question 22

lemniscus tract neurons levels

Answer 22

1- assends in dorsal collumn

2-
cell bodies located in gracillis or cunetus nucleus

3- cell bodies in the thalamus that synapse with the primary somatosensory cortex

Question 23

trigeminal nerve

Answer 23

CN 5

mesencephalic nucleus= unconcious proprioception of muscle of face

main sensory nucleus- is everything

Question 24

divergent tracts

Answer 24

transmission of slow pain

Question 25

nonconscious relay tracts

Answer 25

transmits unconcious proprioception information spinocerebellar tract- autonomic adjustment of movement and posture

Question 26

lesion of DCML

Answer 26

loss of proprioception and fine touch if at cortex- contralateral if at hemi-section= ipisilateral

Question 27

damage to STT

Answer 27

pain and temperature sensation