Touch Flashcards
skin functions
- mechanical barrier
- insulation
- secretion of hormones
- vitamin D synthesis
- touch sense
most sweat glands location
hands + feet
hypothalamus relation to sweat
more blood in hypothalamus (exercise, high temp) = more sweating
emotional sweating
from anxiety, acetylcholine activates eccrine glands
eccrine glands function
producing sweat
sebaceous gland function
realeases oily sebum as barrier
- too much production from hormonal problems leads to acne
cutaneous receptors
- mechanoreceptors
- thermoreceptors
- nocireceptors
mechanoreceptors function
senses pressure, most on feet + palms
nocirepetors
pain receptors
FA I mechanoreceptor
rapidly adapting
small receptor field
Meissner corpuscule
- quick touches
FA II mechanoreceptor
rapidly adapting
big receptor field
Pacinian corpuscule
- light touches
SA I
slow adapting
small receptor field
Merkel discs - feeling of rougness
SA II
slow adapting
big receptor field
Ruffini corpuscule – skin stretch
free nerve ending detects
itches, touch, pressure
discriminative touch systems
- glabrous skin of hand
- conveys properties
displacement behaviour
touch in response to stress
- scratching head
benefits of touch
- faster development
- learn faster
- better immunity
- less shy around sexual behaviour
- gene expression that reduces anxiety
affilitative interpersonal touch
- gentle touches that active CT fibres
- linked to pleasant feelings
kinesthesia
perception of own body movement
thermoreceptors
- free, unspecialized nerve endings that react to change in temp
- adapt fast
interoception location
insular cortex (lateral sulci)
identification by touch
- lateral motions
- pressure
- enclosure
- contour following
antinociception
blocking pain detection, opiates
