Arm recoil
Arm Recoil
Arm recoil (/ɑːrm riːˈkɔɪl/), also known as elbow flexion reflex, is a reflex observed in newborns as a part of the neonatal neurological examination.
Etymology
The term "recoil" is derived from the Middle French word recuillir, meaning "to withdraw". In this context, it refers to the spontaneous withdrawal or pulling back of the arm when it is extended and then released.
Description
During an arm recoil test, the infant's arm is extended for five seconds and then released. A normal response is for the arm to immediately return to a flexed position. This reflex is present at birth and disappears around 2 months of age. It is used to assess the central nervous system's integrity and development in newborns.
Related Terms
- Moro reflex: A reflex seen in newborns when they feel as if they are falling. It involves three components: spreading out the arms (abduction), unspreading the arms (adduction), and crying (usually).
- Rooting reflex: This reflex begins when the corner of the baby's mouth is stroked or touched. The baby will turn his or her head and open his or her mouth to follow and "root" in the direction of the stroking.
- Grasp reflex: Stroking the palm of a baby's hand causes the baby to close his or her fingers in a grasp.
- Babinski reflex: When the sole of the foot is firmly stroked, the big toe bends back toward the top of the foot and the other toes fan out.
External links
- Medical encyclopedia article on Arm recoil
- Wikipedia's article - Arm recoil
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