Jacobs L, Gossman M D
Neurology. 1980 Feb;30(2):184-8. doi: 10.1212/wnl.30.2.184.
One or more of three primitive reflexes (palmomental, snout, and corneomandible) was elicited in 50.5% of 105 normal subjects in the third through the ninth decades of life. The reflexes appeared in a patterned fashion with advancing age. The palmomental reflex appeared earliest and was the most frequent reflex elicited at all ages. The snout and corneomandibular reflexes appeared at later ages and were elicited less frequently. The palmomental and snout reflexes often occurred alone, but the corneomandibular was elicited only when one or both of the other reflexes was also present. These reflexes appear to be normal phenomena in a significant proportion of the healthy population.
在105名年龄从三十多岁到九十多岁的正常受试者中，50.5%的人引出了三种原始反射中的一种或多种（掌颏反射、噘嘴反射和角膜下颌反射）。随着年龄的增长，这些反射以一种有规律的方式出现。掌颏反射出现最早，且在所有年龄段都是引出频率最高的反射。噘嘴反射和角膜下颌反射出现较晚，引出频率较低。掌颏反射和噘嘴反射常常单独出现，但角膜下颌反射只有在其他一种或两种反射也出现时才会引出。在相当一部分健康人群中，这些反射似乎是正常现象。
