The primitive reflex that persists throughout life is
A. Moro reflexB. Tonic neck reflex
C. Palmar grasp reflex
D. Parachute reflex
Answer.D (Parachute reflex)
Timing of selected primitive
reflexes
|
Reflex
|
Onset
|
Fully
developed
|
Durations
|
|
Palmer grasp
|
28 weeks
|
32 weeks
|
2-3 months
|
|
Moro
|
28-32 weeks
|
37 weeks
|
5-6 months
|
|
Rooting
|
32 weeks
|
36 weeks
|
Less prominent
after 1 month
|
|
Tonic neck
|
35 weeks
|
1 month
|
6-7 months
|
|
Parachute
|
7-8 months
|
10-11 months
|
Remain
throughout life
|
