Touch

Question 1

what did aristotle say about touch

Answer 1

it makes us smarter than animals as we have smoother skin- it was nonsense

Question 2

what is somatosensation

Answer 2

a collective term for sensory signals from the bodu

Question 3

what is mechanoreception

Answer 3

term for detecting mechanical pressure/ distortion

Question 4

what is proprioception

Answer 4

term for perception of body position by kinesthetic and vestibular receptors

Question 5

what is noicepetion

Answer 5

pain perception

Question 6

what is thermoception

Answer 6

temperature perception

Question 7

what are the three attributes of a touch receptor

Answer 7

type of sstimulation receptor responds to
size of receptive field
rate of adaptation

Question 8

where are touch receptors located

Answer 8

on outer layer- epidermis and underlayer - dermic

Question 9

what are the four types of mechanoreceptors and what to they sense

Answer 9

meissner corpuscles -touch
merkel disks-touch
ruffinis endings- pressure
pacinian corpuscles- pressure

Question 10

what are the three factors that mechanoreceptors can be categorised by

Answer 10

type of stimulation
size of receptive field
rate of adaptation

Question 11

what is the name for fast adaptation

Answer 11

transient

Question 12

describe merkel discs

Answer 12

slow adapting 1
small receptive field
respond best to steady downward pressure and low frequency vibrations

Question 13

describe ruffinis endings

Answer 13

slow adapting 2
large receptive field
respond to sustained pressures

Question 14

describe mesinner corpuscles

Answer 14

fast adapting 1
small receptive field
responds to vibrations between 5-50hz

Question 15

describe pacinian corpuscles

Answer 15

fast adapting 2
large receptive field
respond to vibrations between 50-700 h

Question 16

describe the work of mechanoreceptors in putting a key in a door

Answer 16

SA1 receptor anables feeling shape of key
SA 2 receptor enables shaping fingers to grasp key
FA1 enables increasing grip force if key is slippin from grasp
FA2 tells you when key hits end of keyhole

Question 17

what are kinesthetic receptors

Answer 17

play role in sense of where limbs are and what kind of movements are made

Question 18

what are three types of kinesthetic receptors

Answer 18

spindles receptors in tendons and receptors in joints

Question 19

describe spindles

Answer 19

convey rate at which muscle fibres are changing in length

Question 20

describe receptors in tendons

Answer 20

provide signals about tnesion in muscles attached to tendons

Question 21

describe receptors in joints

Answer 21

reacts when joint is bent to an extreme angle

Question 22

what are the two populations of thermoreceptors

Answer 22

warmth fibres and cold fibres

Question 23

how does information reach the brain

Answer 23

peripheral nerves

Question 24

how are faster processes enabled

Answer 24

mediated reflex

Question 25

describe monosynaptic reflex

Answer 25

knee jerk mediated by single connection useful for protecting muscles from forces not under conscious control

Question 26

describe polysynaptic reflex

Answer 26

pulling away from fire mediated by interneuron consciously controlled

Question 27

what are the 5 primary somatosensory receiving brain areas

Answer 27

``` central sulcus S1 areas 5 and 7 lateral sulcus S2 ```

Question 28

what is penfields map

Answer 28

he mapped somatosensory cortex

Question 29

what is nociception

Answer 29

transmits info about things rhat cause damage or potential damage to skin

Question 30

whats faster; mechanoreceptors and nociceptors

Answer 30

mechanoreceptors