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Psychology Of Perception > Week 13 > Flashcards

Week 13 Flashcards

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1
Q

Stimuli

A

Mechanical deformations of skin: changes in temperature, pain

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2
Q

Receptors

A

Specialized nerve cells embedded in hairy or glaborous skin

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3
Q

Epidermis

A

Outer layer of dead skin cells

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4
Q

Dermis

A

Next layer, makes new skin cells, contains most of the receptors

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5
Q

Subcutaneous layer

A

Fat/connective tissue; some receptors

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6
Q

Types of receptors

A

Free nerve endings (temperature/pain) and encapsulated nerve endings (touch)

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7
Q

Merkel

A

Slow, small

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8
Q

Meissner

A

Fast, small

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9
Q

Ruffini

A

Slow, large

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10
Q

Pacivian

A

Fast, large

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11
Q

Neural pathways

A

Fibers vary according to stimulus, rate of adaptation, size/definition of receptive field

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12
Q

Place of termination

A

Skin cells project to spinal cord, 31 pairs of fibers transmit info to brain through dorsal roots, nerves

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13
Q

Dorsal column pathway

A

Large fibers, fast conduction, cross at brain stem, project to thalamus, somatosensory cortex. Touch pathway

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14
Q

Spinothalamic pathway

A

Short, slow fibers. Paleo: dull/burning pain. Neo: sharp/pricking pain. Project to limbic system/somatosensory. Pain pathway

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15
Q

Touch thresholds (passive touch

A

Absolute, 1 point
Difference, 2 point
Threshold varies with place stimulated

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16
Q

Touch intensity

A

M=.95 for 60 Hz vibrating stimulus, m=.70 for glaborous, 1.05 for hair skin. Can calculate equal touch contour

17
Q

Touch thresholds(active touch)

A

Thresholds better when actively explore an object- haptic perception

18
Q

Tactile pattern perception

A

Systems for vision impaired people

19
Q

Physical benefits of touch

A

Reduces stress/ lowers likelihood of postpartum depression in expectant mothers
Premature infants more likely to thrive with touch

20
Q

Functions of skin

A

Boundary and interference with outside world

Respiration, protection, sensation

Psychology Of Perception (14 decks)

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