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Flashcards in Special senses definitions Deck (48)
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1

Reflex

Rapid, predictable, involuntary motor responses to stimuli

2

Reflex arc

Neural pathway that mediates reflexes

3

Patellar reflex

Tap the patellar ligament sharply with the reflex hammer just below the knee between the patella and the tibial tuberosity.

4

Simple reflex arc

Two-neuron, monosynaptic reflex arc. patellar/knee jerk reflex

5

Polysynaptic reflex arc

Reflex arc involving participation of one or more interneurons in the reflex arc pathway. i.e. flexor reflex

6

Stretch reflexes

Important postural reflexes, normally acting to maintain posture, balance, and locomotion. Initiated by tapping a tendon or ligament, which stretches the muscle to which the tendon is attached

7

Crossed-extensor reflex

More complex than stretch reflex. Consists of a flexor, or withdrawal, reflex followed by extension of opposite limb.

8

Pupillary light reflex

Shine a light in persons eye while covering opposite eye.

9

Contralateral response

Consensual response, or any reflex observed on one side of the body when the other side has been stimulated

10

Ipsilateral response

The pupillary light response, or any reflex occurring on the same side stimulated

11

Ciliospinal reflex

Stroke hairs on neck lightly, watch pupils dilate

12

Proprioceptors

Respond to internal stimuli but are restricted to skeletal muscles, tendons, joints, ligaments and connective tissue coverings of bones and muscles. Provide info about body movements and position by monitoring degree of stretch of those structures

13

Exteroreceptors

cutaneous receptors in the skin and special senses. react to stimuli in external environment

14

Interoceptors

respond to stimuli arising within the body. found in the internal visceral organs and include stretch receptors in walls of hollow organs, chemoreceptors, and others

15

Tactile corpuscle (merkel disc)

touch, light pressure. found in dermal papillae of hairless skin

16

free nerve endings

pain, temperature. found widespread in the skin

17

bulbous corpuscle

deep continuous pressure and stretch stimuli. found in dermis

18

hair follicle receptor

hair movement, light touch. found entwining hair follicles

19

lamellar corpuscle

deep pressure. found deepest in dermis

20

Two point discrimination test

Use calipers to test the ability to differentiate two distinct sensations when skin is touched simultaneously

21

Tactile localization

Ability to determine which portion of the skin has been touched. use marker to touch body with eyes closed and person marks with another pen.

22

Adaptation of touch sensory receptors

Use pennies. stack one on top of the other each time person can't feel them again.

23

purpose of palpebrae

eyelids, protect eye

24

purpose of lacrimal caruncle

produces a whitish oily secretion

25

purpose of conjunctiva

secretes mucus to lubricate eyeball

26

Action of lateral rectus

moves eye laterally

27

action of medial rectus

moves eye medially

28

action of superior rectus

elevates eye and turns it medially

29

action of inferior rectus

depresses eye and turns it medially

30

action of inferior oblique

elevates eye and turns it laterally