Biomedical subjects
Publications and source records attributed to D Raimondo.
Using the latencies of M response and F-wave, motor nerve conduction was assessed along the entire course of the nerves in various diseases occurring at different levels of the peripheral nervous system. Idiopathic polyneuritis, motor neuron disease, radiculopathies and carpal tunnel syndrome were studied.
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An electrophysiological study of "blink reflex" and "jaw reflex" was carried out on 20 sicilian patients with "definited" Multiple Sclerosis. The R1 component of the "blink reflex" was abnormal in 13 patients on 20 (65%), the R2 component in 8 patients on 20 (40%). Considering together the R1 and R2 responses, the abnormal percentage was 75%. The "jaw reflex" showed abnormal responses in 5 patients on 20 (25%). Considering both the "blink reflex" and "jaw reflex", the pathological percentage was 75%, in order that no patients had isolated changes of the "jaw reflex". The simultaneous study of the two reflexes does not increase the probability to prove pathological responses. The frequency of the clinically silent brain-stem lesions in our patients was not substantially different from that showed by other authors on different populations.
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F-wave duration, amplitude and persistence at different frequencies of the antidromic impulse (0.2-0.5-1-2 Hz) were determined in 18 patients with vascular hemiplegia and in 32 healthy subjects of both sexes in the same age range. In normal subjects F amplitude and persistence showed a significant increase as the stimulation rate increased; in spastic patients a small difference in F amplitude was only found for greater difference in stimulus frequencies, the persistence did not significantly changed at different stimulation rates. Individual cross-correlation values (r) obtained for latency and duration, latency and amplitude, amplitude and duration did not show significant changes at different stimulation rates in patients and in controls.