lifespan perspective of the sensory system

Question 1

dorsal root ganglion

Answer 1

a collection of cell bodies of the afferent sensory fibers

Question 2

perception

Answer 2

integration of sensory impressions into psychologically meaningful information

Question 3

sensory maps

Answer 3

location of sensory receptors in the brain

Question 4

sensory homunculus

Answer 4

shows somatic sensory projections from the body surface

Question 5

nociceptors

Answer 5

pain receptors

Question 6

somatosensory system function

Answer 6

transmit information about the senses to the CNS to regulate behavior

Question 7

what is the first sensory system to function in utero

Answer 7

touch

Question 8

when can a fetus respond to touch

Answer 8

7 weeks

Question 9

when do muscle spindles form

Answer 9

12 weeks in utero

Question 10

when do golgi tendon organs form

Answer 10

16 weeks in utero

Question 11

when does cutaneous sensation spread to the whole body

Answer 11

17 weeks in utero

Question 12

specific touch localization occurs at what age

Answer 12

12-16 months old

Question 13

when can a child identify objects by touch

Answer 13

5 years old

Question 14

when does two point discrimination occur in a child

Answer 14

7 years old

Question 15

when does proprioceptive acuity for movements improve

Answer 15

5-12 years old

Question 16

when is the sensory system the keenest

Answer 16

late adolescence into early adulthood

Question 17

what % does reaction time slow down in middle adulthood

Answer 17

20%

Question 18

what can affect the ability of joint receptors to detect motion

Answer 18

arthritic changes

Question 19

what is in control of posture, locomotion, balance, and hand function

Answer 19

vision

Question 20

saccades

Answer 20

quick simultaneous movement of both eyes in the same direction

Question 21

slow pursuit/tracking

Answer 21

slow smooth eye movements to closely follow a moving object

Question 22

vesibulo-ocular reflex (VOR)

Answer 22

moving head side to side but keeping eyes in one spot

Question 23

vergence

Answer 23

moving the eyes simulations in different directions

tracking an object coming to your nose (convergence) vs going away from nose (divergence)

Question 24

when do eyes form

Answer 24

4 weeks in utero

Question 25

when does myelination begin

Answer 25

13 weeks in utero

Question 26

when is reflexive blinking

Answer 26

6 months of gestation

Question 27

what is the visual acuity at birth

Answer 27

20/800

Question 28

what is the best distance for fixation in newborns

Answer 28

7-9 inches

Question 29

what colors are seen at 2 months

Answer 29

red and yellow

Question 30

when does preference for a colored object occur

Answer 30

3 months

Question 31

when does full color vision occur

Answer 31

4 months

Question 32

when does binocular vision begin maturing and when is adult-like vision developed

Answer 32

3-5 months 2 years

Question 33

when is 20/20 vision achieved by

Answer 33

12 months

Question 34

when are adult levels of depth perception achieved

Answer 34

12

Question 35

when does rapid decline of the visual system occur

Answer 35

60-80

Question 36

when does vision stabilize

Answer 36

40s and 50s

Question 37

when do cataracts begin to form

Answer 37

over 30

Question 38

presbyopia develops at age ___

Answer 38

45

Question 39

decline in the ability to adapt from light to dark environments

Answer 39

40

Question 40

what % of adults over 65 have cataracts

Answer 40

60%

Question 41

what % of adults over 75 have macular degeneration

Answer 41

28%

Question 42

when do vestibular structures begin thickening in utero

Answer 42

week 4

Question 43

when is the vestibular system completely myelinated

Answer 43

birth

Question 44

when is the vestibular ocular reflex present by

Answer 44

2 months

Question 45

when is full maturity of the vestibular system achieved

Answer 45

10-14 years old

Question 46

when does static balance begin

Answer 46

9-12 years old

Question 47

when does dynamic balance begin

Answer 47

12 years

Question 48

when does the vestibular system begin to decline

Answer 48

40s

Question 49

___% reduction in hair cells and ____% reduction in peripheral nerve fibers in adults over 70

Answer 49

40% 36%

Question 50

what is the starting position of the functional reach test

Answer 50

arm closest to the wall feet together keep shoulders square

Question 51

what metacarpal is used to measure during functional reach test

Answer 51

third