We investigated peculiarities of the F waves elicited by stimulation of the median and ulnar nerves in 76 subjects having pronounced loss of cervical lordosis (LCL) and 42 control subjects. The CL angles in these two groups were 0–30 and 31–40 deg, respectively. As was found, the averaged minimum, maximum, and mean latencies and chronodispersion values of both median and ulnar F waves in most cases were slightly longer than in the control, but all intergroup differences were statistically insignificant. At the same time, the averaged median F wave persistence in both upper limbs of LCL patients was significantly smaller (P = 0.000) than that in control subjects. There was no such difference in the ulnar F responses. Recording of the median F wave can be used as an additional approach in diagnosing the LCL state.
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