Sensory Physiology

Question 1

________________: process initiation by external stimulus acting on sensory receptors which produces a nerve impulse to the brain

Answer 1

Sensation

Question 2

___________: receiver of sensory stimulus. Dendrite end of neuron. Converts sensory signal to electrical signal

Answer 2

Receptor

Question 3

___________: external receptor

Answer 3

Extero-receptor

Question 4

___________: internal receptors

Answer 4

Entero-receptor

Question 5

Joint receptor

Answer 5

Proprioceptors

Question 6

_____________: Although the brain interprets the sensation, it projects the sensation back to the location of the stimulus so that it is as though you feel with your fingers not your brain.

Answer 6

Projection

Question 7

________________: occurs for all sensations except pain. If the stimulus is unchanging, the receptors stop responding – e.g. like not noticing a particular odor after awhile.

Answer 7

Adaptation

Question 8

_____________: is when the receptor is still responding for a SHORT time after the stimulus is gone. Try this by staring at a light then closing your eyes. You can still see the light for a short period of time because the receptros are still responding

Answer 8

Afterimage

Question 9

___________: is the ability to tell one sensation from another (e.g. temp. from pressure)

Answer 9

Modality

Question 10

_________receptors: respond to physical change (touch, pressure)

Answer 10

Mechano

Question 11

_________receptors: respond to pain

Answer 11

Noci

Question 12

_________receptors: respond to temperature

Answer 12

Thermo

Question 13

_________receptors: respond to chemicals

Answer 13

Chemo

Question 14

_______________: The ability to tell 2 closely spaced points as distinct and separate points. The denser the receptors, the better

Answer 14

2 point discrimination

Question 15

_________: sharpening of the sensation. If receptors in the center are strongly stimulated and ones toward the periphery are weakly stimulated, the stronger pathway inhibits the weaker pathway.

Answer 15

Lateral inhibition

Question 16

__________: the area served by a receptor. Small where sensitive.

Answer 16

Receptor field

Question 17

Touch receptors are _______________. They are located near the surface of the skin and respond to light touch

Answer 17

Meissner’s or Touch corpuscles

Question 18

____________ are deeper than meissner’s corpuscles and respond to pressure

Answer 18

The Pacinian or Lamellated corpuscles

Question 19

Repeated stimulation of tactile receptors leads to vibration. T or F?

Answer 19

T

Question 20

Thermoreceptors are free nerve endings (not encapsulated) and so are pain receptors. T or F?

Answer 20

T

Question 21

if you over stimulate any receptor you can get a pain sensation (e.g. extreme cold) T or F?

Answer 21

T

Question 22

____________: interpret visceral pain incorrectly as surface/somatic pain. For example, your brain thinks that your left arm and shoulder hurt when it is really visceral pain from your heart.

Answer 22

Referred pain

Question 23

____________: skeletal muscle cells with a neuron ending wrapped around it that respond to stretch of the muscle

Answer 23

Muscle spindles

Question 24

_______________: located in the tendon and respond to contraction of the muscle.

Answer 24

golgi tendon organs

Question 25

__________ and _____________ work together to provide your brain with “muscle sense” or proprioception.

Answer 25

Muscle spindles

Golgi tendon organs

Question 26

If you close your eyes and have your elbow bent, you know it is bent without looking at it. This is do to ________________

Answer 26

Proprioception