13. Touch and Pain

Brain and behaviour chapter 8 - unfinished 

76 cards   |   Total Attempts: 182
  

Cards In This Set

Front Back
Regarding touch, many sensations are blended together such as
Pressure, vibration, smoothness, tickle, wetness
Pain and temperature form a ____ system than touch
Separate
Touch is carried out by an array of ___ in the skin
Receptors
Receptors are __ to __ m^2 in area
1 to 2
3 layers of the skin
Epidermis, dermis, subcutaneous (hypodermis) - not really part of skin
Free nerve ending surrounded by an onion-like capsule
Pacinian corpuscles
Parcinian corpsucles detecs vibrations of around ___ Hz or more
200
What does rapid deformations of capsule lead to
Stretching of the free nerve ending, opening Na+ channels
Pacinian corpuscles have...
Large receptive fields
Is the pacinian corpuscles fast or slow adapting?
Fast
5 type of touch receptors
- free nerve endings- merkels disc -Meissner's corpuscles -pacinian corpuscle - ruffini's ending
Densely packed in skin areas with fine spatial resolution such as the hands, lips, tongue
Merkels disc
Merkel's discs respond to
Very light touch such as a mosquito landing on your arm
Is the merkel's disc fast or slow adapting?
Slow adapting
Merkels disc has...
Great spatial resolution such as edge and point detection