Onset: Birth
Stimulus: Position of labyrinth in inner ear - reflected in head position
Response: Supine position; Body and extremities are held in extension
Prone position - body and extremities are held in flexion
Integration: 6 months
Negative Effects if Persistent:
Ability to initiate rolling
Ability to prop the body on the elbows with extended hips when prone
Ability to flex the trunk and hips to come to a sitting position from the supine position
Often causes full body extension, which interferes with balance in sitting or standing
Source: Dreeben page 421
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