title: Motor potentials of bulbocavernosus muscle after transcranial and lumbar magnetic stimulation: comparative study with bulbocavernosus reflex and pudendal evoked potentials.
abstract: Motor potentials of the bulbocavernosus muscle were recorded in 17 healthy subjects after transcranial and lumbar magnetic stimulation. The latencies (SD) were respectively: 22.9 (1.8) and 5.9 (0.4) ms. The central conduction time was 17.0 (2.5) ms. The bulbocavernosus reflex presented an onset at 34.5 (3.3) ms and a negative peak at 43.1 (3.9) ms. The cortical pudendal evoked potential was W shaped: the first peak had a latency of 35.4 (2.8) ms. The concurrent recording of motor potentials, bulbocavernosus reflex, pudendal evoked potentials gives a measure of peripheral and central, afferent and efferent neurological pathways related to pudendal nerve function.
authors.affiliation: Multiple Sclerosis Study Centre, Gallarate Hospital, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Ghezzi
authors.forename: L
authors.initials: L
authors.lastname: Callea
authors.forename: M
authors.initials: M
authors.lastname: Zaffaroni
authors.forename: R
authors.initials: R
authors.lastname: Montanini
authors.forename: G
authors.initials: G
authors.lastname: Tessera
mesh_terms: D001921:Brain / Q000502:physiology*; D004574:Electromagnetic Fields; D006801:Humans; D008297:Male; D008875:Middle Aged; D009046:Motor Neurons / Q000502:physiology; D009132:Muscles / Q000294:innervation*; D009434:Neural Pathways / Q000502:physiology; D010413:Penis / Q000294:innervation*; D012016:Reference Values; D012018:Reflex / Q000502:physiology*; D012684:Sensory Thresholds / Q000502:physiology; D013116:Spinal Cord / Q000502:physiology*