Official websites use. Share sensitive information only on official, secure websites. A reflex is a muscle reaction that happens automatically in response to stimulation. Certain sensations or movements produce specific muscle responses. The presence and strength of a reflex is an important sign of nervous system development and function. Many infant reflexes disappear as the child grows older, although some remain through adulthood.
A reflex that is still present after the age when it would normally disappear can be a sign of brain or nervous system damage. Infant reflexes are responses that are normal in infants, but abnormal in other age groups.
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These include:. This reflex occurs when the head of a child who is relaxed and lying face up is moved to the side. The arm on the side where the head is facing reaches away from the body with the hand partly open.
The arm on the side away from the face is flexed and the fist is clenched tightly. Turning the baby's face in the other direction reverses the position. The tonic neck position is often described as the fencer's position because it looks like a fencer's stance. This reflex occurs when the side of the infant's spine is stroked or tapped while the infant lies on the stomach.
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The infant will twitch their hips toward the touch in a dancing movement. This reflex occurs if you place a finger on the infant's open palm. The hand will close around the finger. Trying to remove the finger causes the grip to tighten. Newborn infants have strong grasps and can almost be lifted up if both hands are grasping your fingers. This reflex occurs when the baby's cheek is stroked.
