Absent Moro reflex, arm extended at the elbow and positioned against body with decreased grasp on affected side.

Asymmetry of the face during crying and drooping of the corner of the mouth on affected side.

Asymmetry of Moro reflex, arm externally rotated, and grasp reflex absent on affected side.

Asymmetry of Moro reflex, crepitus, no movement, swelling, and tenderness on palpation of affected arm.