Primitive/Spinal Reflexes

Question 1

Flexor Withdrawal

Answer 1

poke same foot - toes extend, foot DF, leg flexes.

28wks gest - 1-2 mo

Question 2

Crossed Extension

Answer 2

poke foot - opposite LE flexes, add, and extends.

28wks gest - 1-2mo

Question 3

Traction

Answer 3

supine to sit by pulling arms - grasp and total flexion of UE.
28wks gest - 2-5mo.

Question 4

Moro

Answer 4

Drop head backwards - extension, abd of UEs, hand opening, and crying, followed by flexion and add of arms.
28wks gest - 5-6mo.

Question 5

Startle

Answer 5

sudden loud noise - extension or abduction of arms, crying.

Birth - persists

Question 6

Grasp (plantar and palmar)

Answer 6

pressure on palm of hand of ball of foot - maintained flexion of fingers or toes.
Palmar: birth - 4-6mo.
Plantar: 28wks gest - 9mo.