Decreased neuronal burst discharge near site of seizure onset in epileptic human temporal lobes.

Abstract:

:We examined auto-correlation and interval distribution characteristics of neuronal discharge from patients with complex partial seizures. The objective was to compare the interictal firing patterns of neurons in mesial temporal structures ipsilateral to the site of seizure onset with firing patterns of neurons in homologous contralateral structures. Spontaneous interictal recordings of 258 single neurons were acquired from 23 patients. A "burst area" measure was derived from the neuronal auto-correlation to assess the likelihood of grouped action potential discharge (burst discharge). Large burst area measures indicate a tendency for single neuronal burst discharge, but do not disclose information about interspike intervals within bursts. Although several measures based on single neuronal interspike interval distributions showed no overall difference between hemispheres, burst area was significantly reduced in mesial temporal structures ipsilateral to the site of seizure onset. Possible mechanisms of decreased burst discharge in epileptogenic regions include selective loss of burst-discharging neurons and increased recurrent inhibition.

journal_name

Epilepsia

journal_title

Epilepsia

authors

Colder BW,Frysinger RC,Wilson CL,Harper RM,Engel J Jr

doi

10.1111/j.1528-1157.1996.tb00001.x

subject

Has Abstract

pub_date

1996-02-01 00:00:00

pages

113-21

issue

2

eissn

0013-9580

issn

1528-1167

journal_volume

37

pub_type

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