Linked Life Data

90603

Source:http://linkedlifedata.com/resource/pubmed/id/90603

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1979-12-27
pubmed:abstractText
Extracellular potassium activity (ak) and field potentials (fp) were measured in the nucleus ventro-postero-lateralis (VPL) thalami in order to assess the extent of thalamic participation in cortical seizure activity. Small increases (up to 0.7 mmole/l) or decreases (up to 0.2 mmole/l) in ak were induced by electrical stimulation of the contralateral forepaw. These changes in ak were spatially more limited than the simultaneously recorded fp. Similar observations were made during weak electrical stimulation of the somatosensory cortex and during interictal spikes in a cortical penicillin focus. Large and widespread increases in ak to levels of 11.6 mmoles/l and slow negative fps of 8 mV accompanied seizure generation either in a cortical penicillin focus or during intense repetitive electrical stimulation of the cortical surface. Subsequent to such increases ak fell to subnormal levels. The amplitudes and durations of such undershoots were correlated with the amplitudes of the preceding increases in ak. Sometimes thalamic seizures ceases before cortical epileptic episodes. This resulted in a decrease of cortical EEG amplitudes. After ablation of the sensorimotor cortex seizures in forepaw-VPL could be induced by stimulation of the somatosensory cortex. These results further support the conclusion that specific thalamic nuclei participate in seizure generation and may serve as a subcortical route of seizure spread.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0013-4694
pubmed:author
pubmed:issnType
Print
pubmed:volume
47
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
329-44
pubmed:dateRevised
2008-9-9
pubmed:meshHeading
pubmed:year
1979
pubmed:articleTitle
Stimulus induced and seizure related changes in extracellular potassium concentration in cat thalamus (VPL).
pubmed:publicationType
Journal Article