[Latency values of 248 H reflexes in 124 normal subjects].
BACKGROUND
The Hoffmann reflex or H reflex is an electrical counterpart of the myotatic reflex. In normal adults is elicited with stimulating the tibial and the median nerves. It is useful as an adjunct study of neuroexamination and assesses the corresponding arc reflexes in their integrity.


METHODS
248 H reflexes were studied stimulating the tibial nerve in 124 healthy subjects.


RESULTS
The latency values were: minimum 23.6 ms; maximum 29.8 ms; mean value 27.6 ± 1.41 ms.


CONCLUSIONS
This work explains the technique to obtain the H reflex and discusses the need for normalized values for each neurophysiology lab.
Hospital Universitario Santa Cristina, Madrid, España. goizu6@hotmail.com
G
G
Goizueta-San Martín
G
G
Ruiz-Rodríguez
G
G
Gutiérrez-Gutiérrez
E
E
Gutiérrez-Rivas
I
I
Millán-Santos
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004558:Electric Stimulation; D004576:Electromyography; D005260:Female; D006181:H-Reflex / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction / Q000502:physiology; D011930:Reaction Time; D055815:Young Adult