Arms at sides of body with elbows in flexion or semi-flexion1
Increased external rotation and elbow extension1
Synergistic movements of upper extremities1
Random arm movements in response to extension in the rest of the body6
Shoulders starting to abduction1
In supine, head turned to one side; developing external rotation and abduction of shoulders
In supine, infant displays synergistic movements of the upper extremities and lower extremities