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A comparison of F waves in peripheral nerve disorders
Abdulkadir Koçer1, Eren Gözke, Nimet Dörtcan
1Neurology Department, PTT Education and Research Hospital, Düzee, Turkey. abdulkadirkocer@yahoo.com
Background And Aim:
F waves have become integral parts of nerve conduction studies in particular. F minimum (Fmin), the most commonly assessed latency, represents the largest and the fastest conducting fibers. The diagnostic yields of other F wave parameters are not obvious. In the present study, we aimed to determine the value of F wave parameters in commonly seen peripheral nerve disorders.
Material And Method:
We studied the F responses in 118 patients who had been diagnosed with different types of neuropathies, clinically and electrodiagnostically, and 68 individuals were used as controls: A total of 470 motor nerve conduction studies and related F-wave parameters were analyzed.
Discussion:
F maximum (Fmax) was the most commonly seen abnormal parameter in the present study, although Fmin has until now been the most commonly studied parameter in clinics routinely. Abnormalities of F waves were more frequently seen in the patients compared to those in the control group and the differences were significant for carpal tunnel syndrome and upper extremity radiculopathies.
Conclusion:
This large database showed that F wave evaluations should include not only Fmin but also Fmax.
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