Infant Motor Dev

Question 1

What is a reflex?

Answer 1

Involuntary, automatic, nearly instantaneous movement in response to a specific stimulus

Question 2

What occurs prenatally in voluntary action?

Answer 2

thumb sucking, arm and leg extensions

Question 3

What occurs 0-2 months postnatal in voluntary action?

Answer 3

Limited, jerky, uncoordinated movement
Little head and neck control at birth
1 mo can lift chin off crib

Question 4

What occurs 2-4 months in voluntary action?

Answer 4

Can roll over
At end of 2 mo lift chest off crib
Can sit upright with lower back support

Question 5

What occurs 4-6 months in voluntary action?

Answer 5

Can sit independently
manual exploration

Question 6

What occurs 6-10 months in voluntary action?

Answer 6

can pull self to a stand
hands and knees crawling
begins using thumbs over fingers

Question 7

What occurs 10-12 months in voluntary action?

Answer 7

bimanual object manipulation
end of 10 months stand independently
11 mo “cruising”

Question 8

What occurs 12-14 months in voluntary action?

Answer 8

Walking, achieve upright balance
controlled falling
by 15 mo, walking well
by 20 mo, running