老人の反射機能について

Studies on the Reflexes of the Aged

　老人ということを定義するのは難かしい問題であるが，我々は一応60歳以上を老人として取扱つた。

　剖検の結果では厳格な老衰死というものは極めて稀であり，老年になると身体各部に種々の病変が現われてくる。その場合特に変化を受け易いのは脈管系及び之に続発する神経系，腎であると云われている。而してその中，臨床神経学的研究については極めて少く，我が国に於いては浴風園を中心として尼子，冲中，椿等の報告があるに過ぎない。

We examined the various reflexes of the aged, 248 cases.

The tendon reflexes were generally hypo-active or negative, but some of them were hyperactive. Especially radial reflex and ulnar reflex were completely negative in 37.7 per-cent of all and in 59.1 percent respectively. 47.3 percent of achilles tendon reflex examined was hypoactive or negative, compared with 30.6 percent of hypoactive or negative patel-lar tendon reflex. Hyperactive patellar tendon reflex was shown in 28.1 percent. Cases with dissociated reflex pattrn which showed hypo-active or negative achilles tendon reflex and hyperactive patellar tendon reflex, were 6.3 percent.

Abdominal reflexes showed negative in al-most cases, but planter reflex was positive in nearly 100 percent. Positive cremasteric ref-lex was obtained in 30.0 percent.

Hoffmann reflex was positive in 45.6 per-cent.

Concerning the pathological reflexes, resu-lted in 36.3 percent the positive cases among examined cases in all. Babinski reflex, Ros-solimo reflex and Puusepp reflex were shown in 12.5 percent, 22.2 percent and 12. 9 percent respectively.