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Flashcards in Unit 3: somatic Deck (80)
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1

perception

interpretation of sensation into meaningful forms occurs in the cerebrum

2

how much sensory information is consciously perceived

very little, most is not processed at all

3

somatic sensation

sensory information from skin and musculoskeletal

4

information from skin examples

superficial: touch, pain, temperature, pressure and vibration; also deep cutateous

5

information from musculoskeletal

proprioception, tension on muscles, joints, position, deep vibration and pain

6

differences in system

unevenly distribution of receptors, responsiveness, different diameters of nerves

7

types of receptors

mechanoreceptors, chemoreceptors, thermoreceptors

8

mechanoreceptors

mechanical deformations touch, pressure, stretch, vibration

9

chemoreceptors

released by cells, injury or infection

10

thermoreceptors

hot, cold

11

parts of body loaded with receptors

hands and face

12

differences in architecture

encapsulated or uncapsulated

13

unencapsulated

free nerve endings, primarily sensitive to tissue damage: pain receptors, temperature fluxes

14

encapsulated sensory cells

touch, vibration

15

Differences in receptors

architecture, receptive fields, type of innervation, attenuation properties

16

pacinian corpuscles

deep vibration

17

ruffinis endings

deep, stretch, joint deformation, warmth, how much force is put on joint

18

meissners corpuscles

shallow, light touch vibration

19

Merkel's disks

shallow, light touch

20

krause end bulbs

shallow, cold

21

nerve endings

temperature

22

Some nerve endings respond to

touch, tickle, or itch

23

What has small receptive fields

meissners and merkel

24

what has large receptive fields

pacinian and ruffini

25

test for receptive field

two point test, whether two points can be distinguished; high resolution vs low resolution

26

2 types of fine touch

superficial and subcutaneous

27

coarse touch

uses free nerve ending, pleasant touch tickle, itch

28

what uses meissners and merkles touch

superficial fine touch

29

types of innervation

Large myelinated, medium myelinated, small myelinated and small unmyelinated

30

4 types of axons

Aa, AB, Ad, C