Coryell J, Cardinali N
Phys Ther. 1979 Jun;59(6):747-53. doi: 10.1093/ptj/59.6.747.
The purpose of this study was to determine whether the asymmetrical tonic neck reflex was present in normal 1- to 12-week-old infants. Twelve infants were observed seven times within the first 12 weeks: at the first and second week and every other week thereafter. Spontaneous behavior was videotaped while the infant lay supine. Infants maintained a head-turned posture during every visit. The asymmetrical tonic neck reflex was present: 1) in the infants' arms during every visit, at a maximum at the sixth week; 2) in their legs, with the longest duration of the response at the first week's visit; and 3) in both arms and legs, with no change throughout seven visits. There were more movements of the face arm than of the skull arm during the seven visits, and the additional movements were in the extension range. The face leg moved more than the skull leg, but only at the 6th, 8th, and 10th weeks. The study confirms that the asymmetrical tonic neck reflex can be observed in the posture and movement of normal infants and that the pattern of appearance of the reflex differs in arms and legs.
本研究的目的是确定1至12周龄的正常婴儿是否存在非对称性紧张性颈反射。12名婴儿在出生后的前12周内接受了7次观察：分别在第1周和第2周，之后每隔一周观察一次。当婴儿仰卧时，对其自发行为进行录像。每次观察时，婴儿均保持头部转向的姿势。非对称性紧张性颈反射表现为：1）在每次观察中，婴儿双臂均出现该反射，在第6周时最为明显；2）在腿部也有该反射，在第1周观察时反应持续时间最长；3）在双臂和双腿均有该反射，且在7次观察中无变化。在7次观察期间，面部侧手臂的动作比颅骨侧手臂更多，且额外动作均在伸展范围内。面部侧腿部比颅骨侧腿部动作更多，但仅在第6周、第8周和第10周时出现这种情况。该研究证实，在正常婴儿的姿势和动作中可以观察到非对称性紧张性颈反射，且该反射在手臂和腿部的出现模式有所不同。
