Dorsal penile nerve stimulation elicits left-hemisphere dominant activation in the second somatosensory cortex

Activation of peripheral mixed and cutaneous nerves activates a distributed cortical network including the second somatosensory cortex (SII) in the parietal operculum. SII activation has not been previously reported in the stimulation of the dorsal penile nerve (DPN). We recorded somatosensory evoke...

Full description

Saved in:
Bibliographic Details
Published in:Human brain mapping 2003-02, Vol.18 (2), p.90-99
Main Authors: Mäkelä, J.P., Illman, M., Jousmäki, V., Numminen, J., Lehecka, M., Salenius, S., Forss, N., Hari, R.
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Brain Mapping
Dominance, Cerebral
Electric Stimulation
Evoked Potentials, Somatosensory
Functional Laterality
functional localization
Fundamental and applied biological sciences. Psychology
human
Humans
Magnetoencephalography
Male
Penis - innervation
Penis - physiology
Peripheral Nerves - physiology
primary somatosensory cortex SI
Reference Values
SEFs
Somatosensory Cortex - physiology
somatosensory evoked fields
Somesthesis and somesthetic pathways (proprioception, exteroception, nociception)
interoception
electrolocation. Sensory receptors
Vertebrates: nervous system and sense organs
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Activation of peripheral mixed and cutaneous nerves activates a distributed cortical network including the second somatosensory cortex (SII) in the parietal operculum. SII activation has not been previously reported in the stimulation of the dorsal penile nerve (DPN). We recorded somatosensory evoked fields (SEFs) to DPN stimulation from 7 healthy adults with a 122‐channel whole‐scalp neuromagnetometer. Electrical pulses were applied once every 0.5 or 1.5 sec to the left and right DPN. For comparison, left and right median and tibial nerves were stimulated alternatingly at 1.5‐sec intervals. DPN stimuli elicited weak, early responses in the vicinity of responses to tibial nerve stimulation in the primary somatosensory cortex. Strong later responses, peaking at 107–126 msec were evoked in the SII cortices of both hemispheres, with left‐hemisphere dominance. In addition to tactile processing, SII could also contribute to mediating emotional effects of DPN stimuli. Hum. Brain Mapping 18:90–99, 2003. © 2002 Wiley‐Liss, Inc.
ISSN:1065-9471
1097-0193
DOI:10.1002/hbm.10078