A reflex of a newborn baby when it hears a loud noise.
The automatic response of a baby—on hearing a loud noise or when the head is left momentarily unsupported—to swing arms outward and then together, as if embracing something, to flex the legs, and often to cry. A type of primitive reflex found only in babies, it normally disappears in three to four months.
Normal reflex of a young infant, elicited by a sudden loud noise, in which the baby flexes the legs and outstretches the arms, often with a cry; also called startle reflex.
A primitive reflex action occurring in newly born infants in response to a sudden movement or noise. Also known as the startle reflex, the baby will throw its arms and legs wide and stiffen its body. This is followed by flexion of the arms and legs. The reflex disappears by 4 months; its persistence suggests a possible neurological condition such as cerebral palsy.
A reflex seen in infants in response to stimuli, such as that produced by suddenly striking the surface on which the infant rests. The infant responds by rapid abduction and extension of the arms followed by an embracing motion (adduction) of the arms.
An instinctual startle response observed in infants, wherein the arms and legs swiftly move away from the body and extend sideways, followed by a subsequent contraction bringing them closer together.
The Moro reflex is an involuntary response in infants where the arms spread out and then come together in a hugging motion, the head jerks back, and the legs stretch out. This reflex is triggered by stimuli like a brief backward fall of the head.