Mechanically evoked cerebral potentials and long-latency muscle responses in the evaluation of afferent and efferent long-loop pathways in humans.
Standing humans were subjected to sudden tilts of a platform toe-up. This resulted in a long-latency response in the anterior tibial muscle with a mean latency of 132 ms. The same physiological stimulus was applied to evoke cerebral potentials. The mechanically evoked potential was characterized by a positive peak with a mean latency of 76.4 ms. Absolute peak latencies were variable between subjects but the side difference after separate stimulation of both legs was only around 2 ms. The recording of both, mechanically evoked long-latency muscle responses and cerebral potentials allows a separate evaluation to be made of afferent and efferent central pathways.
D000328:Adult; D000344:Afferent Pathways / Q000502:physiology; D002540:Cerebral Cortex / Q000033:anatomy & histology / Q000502:physiology*; D004525:Efferent Pathways / Q000502:physiology; D004576:Electromyography; D005071:Evoked Potentials; D005528:Foot / Q000294:innervation; D006801:Humans; D007866:Leg / Q000294:innervation; D009132:Muscles / Q000294:innervation* / Q000502:physiology; D009431:Neural Conduction; D010812:Physical Stimulation; D011930:Reaction Time / Q000502:physiology*