| 释义 |
DictionarySeestartle reflexEncyclopediaSeereflexparachute reflex
star·tle re·flexa primitive reflex response observed in the normal newborn but typically suppressed by 3-4 months of age. Any sudden stimulus (for example, a loud noise, a blow to the supporting surface, or being dropped 5-10 cm through space) causes flexion of the hip and knee joints with fanning of the fingers followed by fist clenching and extension of the upper limbs followed by flexion. Synonym(s): Moro reflex, parachute reflex, startle reaction
See also: cochleopalpebral reflex. parachute reflex (păr′ə-sho͞ot′)n. See startle reflex.Protective abduction of arms, extension of elbows and wrists and spreading of fingers, a normal defence reflex, elicited when an infant is held in ventral suspension and is tilted abruptly forward toward the floor, seen in the 8th–12th month of age, a response that is asymmetrical in infants with hemiparesis and is an early sign of cerebral palsystar·tle re·flex (stahr'tĕl rē'fleks) 1. The reflex response of an infant (contraction of the limb and neck muscles) when allowed to drop a short distance through the air or startled by a sudden noise or jolt.
Synonym(s): parachute reflex. 2. Synonym(s): cochleopalpebral reflex. |