The snout reflex is a primitive reflex observed in infants that facilitates rooting and suckling behaviors [1]. When the infant’s cheek is stroked or tapped near the mouth, it responds by turning its head in that direction and opening its mouth, appearing to search for the stimulus [2]. This reflex emerges as early as the 29th week of gestation and persists for the first 4-6 months after birth [3].

The afferent limb of the reflex involves trigeminal nerve fibers innervating the facial skin [4]. Sensory information is transmitted to the trigeminal nucleus, which activates motor nuclei controlling head rotation via cranial nerves V and VII [5]. The infant turns toward the stimulus seeking nourishment. Sucking and rooting reflexes facilitate breastfeeding in coordination with the snout reflex [6]. As voluntary control develops, this reflex is inhibited and replaced by intentional feeding behaviors.