Linked Life Data

8964262

Source:http://linkedlifedata.com/resource/pubmed/id/8964262

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1996-12-11
pubmed:abstractText
Somatosensory evoked magnetic fields (SEFs), corresponding with electrical median nerve stimulation, were measured using an MRI-linked, whole-head MEG system. In total 184 hemispheres, SEFs were measured, involving 22 normal volunteers and 70 patients with intracranial lesions. The first SEF peak appeared 20.2 +/- 1.5 msec (mean +/- S.D.) after stimulation. The first peak was followed by a second and third peak, 7.7 +/- 3.2 msec and 14.6 +/- 5.4 msec respectively after the first. Corresponding isofield maps suggested a single current dipole oriented in the anterior direction for the first peak, posterior for the second and either anterior or posterior for the third. Using a spherical model and a single current dipole source, the localization of each peak was estimated and superimposed on individually determined MRI images. On a grand average basis, the first-peak dipole was localized on the posterior surface of the central sulcus, "area 3b." The second-peak dipole was localized 3.7 mm medial (P < 0.001) and 2.0 mm superior (P < 0.001) to the first-peak dipole, on the anterior wall of the central sulcus, "area 4." This study with a large number of subjects was able to statistically distinguish two adjacent cortical sources, located on opposite walls of the central sulcus, and within a few millimeters of each other.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0013-4694
pubmed:author
pubmed:issnType
Print
pubmed:volume
100
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
44-50
pubmed:dateRevised
2008-9-9
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Neuromagnetic evidence of pre- and post-central cortical sources of somatosensory evoked responses.
pubmed:affiliation
Department of Neurosurgery, Tohoku University School of Medicine, Sendai, Japan.
pubmed:publicationType
Journal Article