TY - JOUR
T1 - Axillary F central latency
T2 - Simple electrodiagnostic technique for proximal neuropathy
AU - Wu, Y.
AU - Kunz, J. R.M.
AU - Putnam, T. D.
AU - Stratigos, J. S.
N1 - Copyright:
Copyright 2004 Elsevier B.V., All rights reserved.
PY - 1983
Y1 - 1983
N2 - A simple technique is described for measuring the F-wave conduction time of the proximal segment of peripheral nerves. This should prove helpful in the diagnosis of a proximal neuropathy or myelopathy. The F wave (Fw) and M response at the wrist (Mw) and the M response at the axilla (Ma) can be used to calculate the conduction time, defined as Axillary F Central Latency (AFCL), between the spinal cord and the axilla, covering a horizontal distance of 25cm twice. The calculated AFCL (AFCL = (Mw+Fw) - 2Ma) in our control group of 30 normal subjects was 11.2±0.8msec (mean and 1 standard deviation) for the ulnar or median nerve. An AFCL of more than 13.6msec (mean plus 3SD), or a discrepancy of the AFCL greater than 2.1msec in the same nerves between the 2 sides or between the median and ulnar nerves on the same side suggests an abnormality involving the proximal nerve segment. The prolonged AFCL has been found in patients with Guillain-Barre syndrome (GBS), brachial plexus lesions, syringomyelia and, in a few cases, with thoracic outlet syndrome (TOS).
AB - A simple technique is described for measuring the F-wave conduction time of the proximal segment of peripheral nerves. This should prove helpful in the diagnosis of a proximal neuropathy or myelopathy. The F wave (Fw) and M response at the wrist (Mw) and the M response at the axilla (Ma) can be used to calculate the conduction time, defined as Axillary F Central Latency (AFCL), between the spinal cord and the axilla, covering a horizontal distance of 25cm twice. The calculated AFCL (AFCL = (Mw+Fw) - 2Ma) in our control group of 30 normal subjects was 11.2±0.8msec (mean and 1 standard deviation) for the ulnar or median nerve. An AFCL of more than 13.6msec (mean plus 3SD), or a discrepancy of the AFCL greater than 2.1msec in the same nerves between the 2 sides or between the median and ulnar nerves on the same side suggests an abnormality involving the proximal nerve segment. The prolonged AFCL has been found in patients with Guillain-Barre syndrome (GBS), brachial plexus lesions, syringomyelia and, in a few cases, with thoracic outlet syndrome (TOS).
UR - http://www.scopus.com/inward/record.url?scp=0020694376&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0020694376&partnerID=8YFLogxK
M3 - Article
C2 - 6299229
AN - SCOPUS:0020694376
VL - 64
SP - 117
EP - 120
JO - Archives of Physical Medicine and Rehabilitation
JF - Archives of Physical Medicine and Rehabilitation
SN - 0003-9993
IS - 3
ER -