[Late motor response: axon motor reflex and peripheral late wave]

The axon reflex (AR) is an intermediate response evoked by submaximal stimulation and eliminated by supramaximal stimulation: peripheral late wave (PWL) is a late motor response that appears with supramaximal stimulation and is regularly repeated. The PWL has been studied in 185 subjects and has been obtained in 70 cases (36 cases of polyneuropathies, 23 of nerve root lesions, 6 of peripheral nerve lesions, 1 of poliomyelitis and 4 healthy subjects); the AR has been studied in 35 subjects and found in 4 cases (2 cases of nerve root lesions, 1 of poliomyelitis and 1 of peripheral lesion). It seems that the two responses have no common characteristics and that the persistence of the PWL is rather inconstant.