PSY280H1 Study Guide - Haptic Perception, Muscle Spindle, Visual Cortex

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Published on 19 Aug 2012
School
UTSG
Department
Psychology
Course
PSY280H1
Professor
Page:
of 11
PSY280 AUGUST 7, 2012
PROPRIOCEPTION
Somat cortex in parietal
Somatosensation
- Includes touch
- Think of som of body think of touch
- Touch allows us to interact with environment, effectionate
- Tocuh we use when cant see objects looking through purse
- Reproduction touch
- Temp relative to temp, regulate internal state and external env
- Somat dtetcing threat to body notice when there is threat to internal state
- Prop detect limbs in space postion kinesthesia type of propsenation intercgangably
- Olympics prop gymnast hit those beams
Somat
- Diff fibers for dif senses like vison and hearing segregated independt and inergrate higher levels
- Dif receptors
- Machno pressure changes touch
- Thermo changes in temp heat vs cold
- Nociceptor pain identify damage to skin or internal organs
- Propiceptor allow us detect position if limbs all receptors linked to fibers
- A alpha
- All fibers linked to spec rec
- 1st prop
- 2 touch mach
- 3 pain temp
- Fin temp pain an itch
- Thinner and less myleinated
- Myleianted prop
- Final is non myle very little
Skin
- Touch temp and pain is skin
- Macono therm in skin
- Prop in muscles and tendons
- Skin 3 layers
- Epi outher layer
- Dermis
- And subca
- Epi dead skin of dermis provides barrier of moisture
- Dermis machno rec and rec to touch and dermis largest layer as die pushed to dermis
- Sub consist of fat cells
- Skin largestheaviest organ, 15 feet extende and 10 pound, complex
- All body skin
Contd
- Can be hairy or hairless
- Glabrous hairless
- Hairy skin and glab free
- Majority is hairy and some hairless
- Glab will be palms hands and feetsole, lips, fingertips toes genitals and eye lids
- Hairless more sensitive and more machno rec, glab more sens
Mach
- Touch
- Change in pressure or mech
- A beta
- Middle range of myleinaion
- Can be charactrerezied by type of stim
- Size of receptive field
- And rate of adapation
Stim
- Vibrating fast perception of warmth cross perception
Size
- Vision are visual for touch is skin
- Small or large rec filed
- Large less acuity not distinct difference across
- Small know touches certain touch either on or off rec filed
Adpt
- Fast or slow
- Fast firing bursts when stim on or off body, applying pressure fire when pressure on and then off
as soon stim off
- Not in between though
- Fast changes in pressure and senst to temperal pattern time stim on and off
- Slow respond to cont stimulation on then stays bursts till away contin pressure not time or
temperal sens as fast
Mach
- Dist rate of firing recp field
- 4
- Based on small rec field and adaptation
- 4 machno based on adap and large or small rec field
Contd
- Sens to dif stim
- Messner slow or short vib grip slip grapping cup to heavy and sliping detects slip, short
vibrations that are quick
- Merkel short freq but sent to indent basic pressure change in indent of skin first hits you
first contact with stimulus texter and patern perception
- Pac highfrq vibration skin contact detects when first make contact merkel text and
pattern pac when first in contact pac skin contact and vibration that occur
- Ruffini stretching bc more into grip bc stretch skin or contraxcitng change in stretching
identify how much pressure to grab object stable grip messner slip
- Have key find in pocket shape merkel pressure the texture, shape of finger to grasp key the
ruffini grip, not slip the messner hold right pressure, into houselock key to lock the pacinian
Tactile
- Detect details on skin
- Fingertips two points detect diff in pressure
- On formarm on point bc tactile less
- Ta 2 point threshold
- Grating
- Or raise patter
- 2 point min sep to perceive to two stimuli
- Tocu skin two point and when 2 points and not one
- Grating groved stim with orientation and tell direction of grating
- Raised patter like braile and identify dif in surface
Contd
- Varies diff parts of body
- Hairless skin areas
- Min threshold toes less for legs
- Why diff
Contd

Document Summary

Think of som of body think of touch. Touch allows us to interact with environment, effectionate. Tocuh we use when cant see objects looking through purse. Temp relative to temp, regulate internal state and external env. Somat dtetcing threat to body notice when there is threat to internal state. Prop detect limbs in space postion kinesthesia type of propsenation intercgangably. Thermo changes in temp heat vs cold. Propiceptor allow us detect position if limbs all receptors linked to fibers. Diff fibers for dif senses like vison and hearing segregated independt and inergrate higher levels. Nociceptor pain identify damage to skin or internal organs. Epi dead skin of dermis provides barrier of moisture. Dermis machno rec and rec to touch and dermis largest layer as die pushed to dermis. Skin largestheaviest organ, 15 feet extende and 10 pound, complex. Glab will be palms hands and feetsole, lips, fingertips toes genitals and eye lids.