Tonic Neck Reflex

**Semantic type:** Finding

**Definition:** An involuntary, primal response in the neonate in which the arm extends to follow the infant's gaze, while the opposing arm and leg flex inward.

**Synonyms:** - ATNR - ATNR - ATNRFX - Asymmetric Tonic Neck Reflex - Asymmetric Tonic Neck Reflex - Asymmetrical Tonic Neck Reflex