Dorsal root reflexes in kittens.

Dorsal root reflexes, evoked by stimulating the peripheral nerves, were recorded from dorsal roots in kittens in the age range 1/2 day to 66 days and adult cats. No dorsal root reflex (DDR) activity was observed in the newborns. Once it appeared on 4th-5th day, the DRR magnitude (amplitude and duration) increased monotonically with age showing a peak at the end of the 4th week. During the 5th week, the activity declined towards adult values.