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Electroneurography index based on nerve conduction study data: Method and findings in control subjects
Author(s) -
Tacconi Paolo,
Manca Davide,
Tamburini Giorgio,
Ferrigno Paola,
Cossu Gianni,
Cannas Antonino,
Giagheddu Marcello
Publication year - 2004
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.10523
Subject(s) - electroneuronography , h reflex , nerve conduction , f wave , sural nerve , medicine , nerve conduction velocity , anatomy , mathematics , cardiology , audiology , electrodiagnosis , electromyography , physical medicine and rehabilitation
We developed a summary score of data obtained from nerve conduction studies (NCS). The principle of such approach is that when a nonrandom trend to lower amplitudes or conduction velocities is present, it may be revealed by a summary nerve conduction score. In a group of normal subjects, peroneal, sural, ulnar, and superficial radial nerves were studied; age‐ and height‐related F‐wave and soleus H‐reflex latencies were also examined. Z‐scores of distal latencies, amplitudes, conduction velocities, F‐wave latencies, and H‐index were averaged in order to obtain three electroneurography (ENG) indices: a simple arithmetic (ENG index 1) and two weighted means (index 2 and index 3), assigning a double or triple weight to lower limb z‐scores. Reference limits were established using multiple regression equations of ENG indices against age and height. This technique could be useful in providing a better cut‐off between normal and diseased populations and in improving test–retest variability of NCS when follow‐up studies are required. Muscle Nerve 29: 89–96, 2004