The Indications for and the Role of Depth Electrode Recording in Epilepsy

1983 ◽  
Vol 46 (1-4) ◽  
pp. 33-36 ◽  
Author(s):  
André Olivier ◽  
Peter Gloor ◽  
Felipe Quesney ◽  
Frederick Andermann
Keyword(s):  
Depth Electrode ◽  
Electrode Recording

scholarly journals Endonasal endoscopic surgery for temporal lobe epilepsy associated with sphenoidal encephalocele

2021 ◽  
Vol 12 ◽  
pp. 379
Author(s):  
Nobutaka Mukae ◽  
Daisuke Kuga ◽  
Daisuke Murakami ◽  
Noritaka Komune ◽  
Yusuke Miyamoto ◽  
...  
Keyword(s):  
Temporal Lobe Epilepsy ◽  
Temporal Lobe ◽  
Temporal Region ◽  
Endoscopic Endonasal ◽  
Sphenoidal Sinus ◽  
High Frequency Oscillations ◽  
Depth Electrode ◽  
Electrode Recording ◽  
Subdural Electrode

Background: Temporal lobe epilepsy (TLE) associated with temporal lobe encephalocele is rare, and the precise epileptogenic mechanisms and surgical strategies for such cases are still unknown. Although the previous studies have reported good seizure outcomes following chronic subdural electrode recording through invasive craniotomy, only few studies have reported successful epilepsy surgery through endoscopic endonasal lesionectomy. Case Description: An 18-year-old man developed generalized convulsions at the age of 15 years. Despite treatment with optimal doses of antiepileptic drugs, episodes of speech and reading difficulties were observed 2–3 times per week. Long-term video electroencephalogram (EEG) revealed ictal activities starting from the left anterior temporal region. Magnetic resonance imaging revealed a temporal lobe encephalocele in the left lateral fossa of the sphenoidal sinus (sphenoidal encephalocele). Through the endoscopic endonasal approach, the tip of the encephalocele was exposed. A depth electrode was inserted into the encephalocele, which showed frequent spikes superimposed with high-frequency oscillations (HFOs) suggesting intrinsic epileptogenicity. The encephalocele was resected 8 mm from the tip. Twelve months postoperatively, the patient had no recurrence of seizures on tapering of the medication. Conclusion: TLE associated with sphenoidal encephalocele could be controlled with endoscopic endonasal lesionectomy, after confirming the high epileptogenicity with analysis of HFOs of intraoperative EEG recorded using an intralesional depth electrode.

Role of Potassium Conductances in Determining Input Resistance of Developing Brain Stem Motoneurons

2000 ◽  
Vol 84 (5) ◽  
pp. 2330-2339 ◽  
Author(s):  
William E. Cameron ◽  
Pedro A. Núñez-Abades ◽  
Ilan A. Kerman ◽  
Tracy M. Hodgson
Keyword(s):  
Membrane Potential ◽  
Brain Stem ◽  
Barium Chloride ◽  
Input Resistance ◽  
Membrane Resistance ◽  
Electrode Recording ◽  
Percent Increase ◽  
Potassium Conductances ◽  
Brain Stem Slices

The role of potassium conductances in determining input resistance was studied in 166 genioglossal (GG) motoneurons using sharp electrode recording in brain stem slices of the rats aged 5–7 days, 13–15 days, and 19–24 days postnatal ( P). A high magnesium (Mg2+; 6 mM) perfusate was used to block calcium-mediated synaptic release while intracellular or extracellular cesium (Cs+) and/or extracellular tetraethylammonium (TEA) or barium (Ba2+) were used to block potassium conductances. In all cases, the addition of TEA to the high Mg2+ perfusate generated a larger increase in both input resistance ( R n) and the first membrane time constant (τ0) than did high Mg2+ alone indicating a substantial nonsynaptic contribution to input resistance. With intracellular injection of Cs+, GG motoneurons with lower resistance (<40 MΩ), on the average, showed a larger percent increase in R n than cells with higher resistance (>40 MΩ). There was also a significant increase in the effect of internal Cs+ on R n and τ0 with age. The largest percent increase (67%) in the τ0 due to intracellular Cs+ occurred at P13–15, a developmental stage characterized by a large reduction in specific membrane resistance. Addition of external Cs+blocked conductances (further increasing R n and τ0) beyond those blocked by the TEA perfusate. Substitution of external calcium with 2 mM barium chloride produced a significant increase in both R n and τ0at all ages studied. The addition of either intracellular Cs+ or extracellular Ba2+created a depolarization shift of the membrane potential. The amount of injected current required to maintain the membrane potential was negatively correlated with the control R n of the cell at most ages. Thus low resistance cells had, on the average, more Cs+- and Ba2+-sensitive channels than their high resistance counterparts. There was also a disproportionately larger percent increase in τ0 as compared with R n for both internal Cs+ and external Ba2+. Based on a model by Redman and colleagues, it might be suggested that the majority of these potassium conductances underlying membrane resistance are initially located in the distal dendrites but become more uniformly distributed over the motoneuron surface in the oldest animals.

1H-MRS imaging in intractable frontal lobe epilepsies characterized by depth electrode recording

NeuroImage ◽  
2005 ◽  
Vol 26 (4) ◽  
pp. 1174-1183 ◽  
Author(s):  
M. Guye ◽  
J.P. Ranjeva ◽  
Y. Le Fur ◽  
F. Bartolomei ◽  
S. Confort-Gouny ◽  
...  
Keyword(s):  
Frontal Lobe ◽  
1H Mrs ◽  
Depth Electrode ◽  
Electrode Recording

The Place of Stereotactic Depth Electrode Recording in Epilepsy

1985 ◽  
Vol 48 (1-6) ◽  
pp. 395-399 ◽  
Author(s):  
André Olivier ◽  
Peter Gloor ◽  
L. Frederick Andermann ◽  
Felipe Quesney
Keyword(s):  
Depth Electrode ◽  
Electrode Recording

Anterior Callosotomy and Chronic Depth Electrode Recording in the Surgical Management of Some Intractable Seizures

1983 ◽  
Vol 46 (1-4) ◽  
pp. 52-56 ◽  
Author(s):  
G. Bouvier ◽  
C. Mercier ◽  
J.M. St. Hilaire ◽  
N. Giard ◽  
R. Labrecque ◽  
...  
Keyword(s):  
Surgical Management ◽  
Depth Electrode ◽  
Electrode Recording ◽  
Intractable Seizures

Functional Connectivity Between Auditory Areas Field L and CLM and Song System Nucleus HVC in Anesthetized Zebra Finches

2007 ◽  
Vol 98 (5) ◽  
pp. 2747-2764 ◽  
Author(s):  
Sarita S. Shaevitz ◽  
Frédéric E. Theunissen
Keyword(s):  
Functional Connectivity ◽  
Zebra Finches ◽  
Auditory Responses ◽  
Auditory Forebrain ◽  
Electrode Recording ◽  
Cross Correlation Analysis ◽  
Vocal System ◽  
Motor Information ◽  
Field L

A key discovery that has emerged from studies of the vocal system in songbirds is that neurons in these regions respond preferentially to playback of the bird's own song (BOS). This BOS selectivity is not a general property of neurons in primary and secondary auditory forebrain regions, field L and caudolateral mesopallium (CLM). Moreover, anatomical studies have been unable to conclusively define a direct projection from field L and/or CLM to HVC, a central structure for integrating sensory and motor information in the vocal system. To examine the communication between these regions, we used simultaneous dual-electrode recording in anesthetized male zebra finches and cross-correlation analysis to estimate the functional connectivity between auditory areas, field L and CLM, and HVC. We found that ≥18% of neurons in field L and 33% of neurons in CLM are functionally connected to HVC, most with auditory forebrain leading-HVC latencies ranging from 0.5 to 15 ms. These results indicate that field L and CLM communicate extensively with HVC through both direct and indirect anatomical connections. To further explore the role of the auditory forebrain cells that are functionally connected with HVC, we assessed their responsiveness and selectivity for a variety of natural and synthetic auditory stimuli. We found that field L and CLM neurons that are functionally connected to HVC exhibit generic auditory forebrain properties including the lack of BOS selectivity. This finding puts further constraints on the neural architecture and the nature of the nonlinearity that leads to BOS-selective auditory responses in the vocal control nuclei.

Intraoperative definition of bottom-of-sulcus dysplasia using intraoperative ultrasound and single depth electrode recording – A technical note

2018 ◽  
Vol 48 ◽  
pp. 191-195 ◽  
Author(s):  
Dorothea Miller ◽  
Patrick Carney ◽  
John S. Archer ◽  
Gregory J. Fitt ◽  
Graeme D. Jackson ◽  
...  
Keyword(s):  
Intraoperative Ultrasound ◽  
Technical Note ◽  
Depth Electrode ◽  
Electrode Recording ◽  
Definition Of

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor

Role of the allergist in diagnosis and management of patients with uveitis

JAMA ◽  
1966 ◽  
Vol 195 (3) ◽  
pp. 167-172 ◽  
Author(s):  
T. E. Van Metre
Keyword(s):  
Diagnosis And Management
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