Zygomatic Approach for Resection of Mesial Temporal Epileptic Focus

Abstract By using the zygomatic approach, temporal mesial and polar epileptic foci are easily accessible through an incision in the inferior temporal gyrus. In this approach, a major part of the superior and middle temporal gyrus is preserved, and there is no risk of postoperative dysnomia even on the dominant side for speech. Combined use of depth and subdural electrodes is advisable for precise determination of focus distributions throughout the mesial and lateral structures of the temporal lobe. We have applied this approach in 5 patients with satisfactory results.

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Stereotactic electroencephalography with temporal grid and mesial temporal depth electrode coverage: does technique of depth electrode placement affect outcome?

Journal of Neurosurgery ◽

10.3171/2009.12.jns091073 ◽

2010 ◽

Vol 113 (1) ◽

pp. 32-38 ◽

Cited By ~ 23

Author(s):

Jamie J. Van Gompel ◽

Fredric B. Meyer ◽

W. Richard Marsh ◽

Kendall H. Lee ◽

Gregory A. Worrell

Keyword(s):

Temporal Lobe ◽

Middle Temporal Gyrus ◽

Electrode Implantation ◽

Middle Temporal ◽

Contact Depth ◽

Depth Electrodes ◽

Depth Electrode ◽

Group A ◽

Group B ◽

Seizure Localization

Object Intracranial monitoring for temporal lobe seizure localization to differentiate neocortical from mesial temporal onset seizures requires both neocortical subdural grids and hippocampal depth electrode implantation. There are 2 basic techniques for hippocampal depth electrode implantation. This first technique uses a stereotactically guided 8-contact depth electrode directed along the long axis of the hippocampus to the amygdala via an occipital bur hole. The second technique involves direct placement of 2 or 3 4-contact depth electrodes perpendicular to the temporal lobe through the middle temporal gyrus and overlying subdural grid. The purpose of this study was to determine whether one technique was superior to the other by examining monitoring success and complications. Methods Between 1997 and 2005, 41 patients underwent invasive seizure monitoring with both temporal subdural grids and depth electrodes placed in 2 ways. Patients in Group A underwent the first technique, and patients in Group B underwent the second technique. Results Group A consisted of 26 patients and Group B 15 patients. There were no statistically significant differences between Groups A and B regarding demographics, monitoring duration, seizure localization, or outcome (Engel classification). There was a statistically significant difference at the point in time at which these techniques were used: Group A represented more patients earlier in the series than Group B (p < 0.05). The complication rate attributable to the grids and depth electrodes was 0% in each group. It was more likely that the depth electrodes were placed through the grid if there was a prior resection and the patient was undergoing a new evaluation (p < 0.05). Furthermore, Group A procedures took significantly longer than Group B procedures. Conclusions In this patient series, there was no difference in efficacy of monitoring, complications, or outcome between hippocampal depth electrodes placed laterally through temporal grids or using an occipital bur hole stereotactic approach. Placement of the depth electrodes perpendicularly through the grids and middle temporal gyrus is technically more practical because multiple head positions and redraping are unnecessary, resulting in shorter operative times with comparable results.

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A Study on Material Functional Connectivity of the Human Brain via Granger Causality

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.548.833 ◽

2012 ◽

Vol 548 ◽

pp. 833-838

Author(s):

Hong Yan Zhang ◽

Zhi Jun Qiua ◽

Xin Tian

Keyword(s):

Temporal Lobe Epilepsy ◽

Causal Relationship ◽

Granger Causality ◽

Temporal Lobe ◽

Epileptic Focus ◽

The Matrix ◽

Channel Information ◽

Right Temporal Lobe Epilepsy ◽

Relationship Of

16-channel EEG data during intermittent episodes of epilepsy is recoded and analyzed to find the lesions source for temporal lobe epilepsy by Granger causality. And the analysis of EEG with the lesions of temporal lobe epilepsy and non-lesions area of relationship between cause and effects is focused on, exploring temporal lobe epilepsy with lesions in other regions of the information transduction relationship for the clinical determination of temporal lobe epileptic focus to provide a theoretical the support. There are 8 cases patients which 6 cases patients of left-temporal lobe epilepsy and 2 cases patients of right-temporal lobe epilepsy in this work, Sampling frequency fs=200Hz，time t=20s (Sampling points N=4000). Granger causality is used to direction of the information transduction between each channel of the EEG signals. Autoregressive methods of EEG analysis for multi-channel data and determination of the coefficient of the matrix A, and proportion of operations on the matrix A is applied to get the result of matrix I which can reflect the causal relationship between each channel. The result shows that Granger causality can test the location of the lesions source and the areas that the information was reached. The results are consistent with the diagnosis of the EEG and CT. Granger causality not only can analyze the causal relationship of EEG, and it can calculate the multi-channel information transduction between the directions of EEG, which can provide support in the clinic for determine the source of seizure.

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Both the Middle Temporal Gyrus and the Ventral Anterior Temporal Area Are Crucial for Multimodal Semantic Processing: Distortion-corrected fMRI Evidence for a Double Gradient of Information Convergence in the Temporal Lobes

Journal of Cognitive Neuroscience ◽

10.1162/jocn_a_00244 ◽

2012 ◽

Vol 24 (8) ◽

pp. 1766-1778 ◽

Cited By ~ 195

Author(s):

Maya Visser ◽

Elizabeth Jefferies ◽

Karl V. Embleton ◽

Matthew A. Lambon Ralph

Keyword(s):

Temporal Lobe ◽

Visual Processing ◽

Semantic Processing ◽

Ventral Surface ◽

Middle Temporal Gyrus ◽

Temporal Region ◽

Neural Basis ◽

Temporal Area ◽

Middle Temporal ◽

Principal Axes

Most contemporary theories of semantic memory assume that concepts are formed from the distillation of information arising in distinct sensory and verbal modalities. The neural basis of this distillation or convergence of information was the focus of this study. Specifically, we explored two commonly posed hypotheses: (a) that the human middle temporal gyrus (MTG) provides a crucial semantic interface given the fact that it interposes auditory and visual processing streams and (b) that the anterior temporal region—especially its ventral surface (vATL)—provides a critical region for the multimodal integration of information. By utilizing distortion-corrected fMRI and an established semantic association assessment (commonly used in neuropsychological investigations), we compared the activation patterns observed for both the verbal and nonverbal versions of the same task. The results are consistent with the two hypotheses simultaneously: Both MTG and vATL are activated in common for word and picture semantic processing. Additional planned, ROI analyses show that this result follows from two principal axes of convergence in the temporal lobe: both lateral (toward MTG) and longitudinal (toward the anterior temporal lobe).

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Evaluation of Brain Structure Based on Voxel and Surface Morphology in Adults with MRI Negative Temporal Lobe Epilepsy

10.21203/rs.3.rs-1205693/v1 ◽

2022 ◽

Author(s):

Fan Yang ◽

Hanjiaerbieke Kukun ◽

Wenxiao Jia ◽

Shuang Ding ◽

Wei Zhao ◽

...

Keyword(s):

Temporal Lobe Epilepsy ◽

Temporal Lobe ◽

Gray Matter ◽

Age Of Onset ◽

Morphological Changes ◽

Fusiform Gyrus ◽

Parahippocampal Gyrus ◽

Middle Temporal Gyrus ◽

Control Group ◽

Middle Temporal

Abstract Background MRI-negative TLE (TLE-N) is a manifestation lacks visible MRI findings yet with detectable electrophysiological changes. In this study, differences of gray matter in drug-controlled MRI negative temporal lobe epilepsy (cTLE-N) and drug-resistant MRI negative temporal lobe epilepsy (rTLE-N) patients were calculated and analyzed by voxel-based morphology (VBM) and surface-based morphology (SBM), to discover the brain structural changes of TLE-N patients. Materials and methods Consecutive resident patients with 30 cTLE-N and 21 rTLE-N were recruited into respective groups, and 30 healthy controls’ structural MRI (sMRI) data collected as a control group. Open-source software based on VBM and SBM was deployed as gray matter volume (GMV) and cortical thickness (CT) analytic tools. Results VBM analysis showed that GMV of bilateral thalamus and right lingual gyrus of cTLE-N group, and left hippocampus, left fusiform gyrus and left thalamus of rTLE-N group were smaller compared to HC group(FDR corrected, P<0.05), while right cerebellum, inferior temporal gyrus, hippocampus, parahippocampal gyrus, amygdala, fusiform gyrus, orbital middle frontal gyrus, and left posterior central gyrus in cTLE-N group, and bilateral cerebellum and middle temporal gyrus, right fusiform gyrus, amygdala, hippocampus, and left middle occipital gyrus of rTLE-N group were greater than HC group(FDR corrected, P<0.05). SBM analysis showed that CT of the left medial orbitofrontal cortex and lateral occipital cortex in cTLE-N group, and thickness of the left medial orbitofrontal, temporal pole, middle temporal gyrus and right anterior superior cingulate cortex in rTLE-N group were thinner, compared to HC group. Correlation analysis showed that GMV and CT of different structures were correlated with age of onset, disease duration, and MoCA score. Conclusion This study utilized two different sMRI analytic tools and discovered several brain morphological changes in TLE-N. These morphological changes were also correlated with clinical variables. Further study may indicate the potential of these findings on the recognition of the TLE-N epilepsy network.

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Application of Historical Geophysical Materials in Searching for Cu-Ag Ore Deposits—A New Direction of Research

Minerals ◽

10.3390/min10080725 ◽

2020 ◽

Vol 10 (8) ◽

pp. 725

Author(s):

Stanisław Speczik ◽

Lidia Dziewińska ◽

Waldemar Jóźwiak ◽

Krzysztof Zieliński

Keyword(s):

Precise Determination ◽

Ore Deposits ◽

Geological Exploration ◽

Seismic Section ◽

Combined Use ◽

New Instrument ◽

Seismic Records ◽

Gravimetric Data ◽

Resolution Of Imaging

This paper presents a new instrument in geological exploration, which uses historical geophysical data for the indication of potential zones of the occurrence of Cu-Ag ore, based on the example of the newly discovered Nowa Sól deposit in south-western Poland. Basic historical seismic and gravimetric data were applied along with transformed maps. The new method of effective reflection coefficients (ERC) allowed the utilization of archival seismic records for a more precise determination of the most vaguely traced interfaces within the Permian Zechstein unit. Compared to an amplitude-based seismic section, an ERC section is characterized by its highly increased resolution of imaging. The tracing of changes in the facies and the tectonics of Zechstein sediments, particularly in a zone of their contact with Rotliegend rocks, along with the new ERC method, enabled the establishing of precise locations of prospecting boreholes. The combined use of ERC and historical well logs also allowed more precise identification of the shape of oxidized areas and the adjacent orebodies.

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Cortical projection of the inferior choroidal point as a reliable landmark to place the corticectomy and reach the temporal horn through a middle temporal gyrus approach

Arquivos de Neuro-Psiquiatria ◽

10.1590/0004-282x20140165 ◽

2014 ◽

Vol 72 (10) ◽

pp. 777-781 ◽

Cited By ~ 1

Author(s):

Thomas Frigeri ◽

Albert Rhoton ◽

Eliseu Paglioli ◽

Ney Azambuja

Keyword(s):

Temporal Lobe Epilepsy ◽

Temporal Lobe ◽

Mesial Temporal Lobe Epilepsy ◽

Cerebral Hemispheres ◽

Middle Temporal Gyrus ◽

Cortical Projection ◽

Anatomical Features ◽

Middle Temporal ◽

Temporal Horn ◽

Mesial Temporal Lobe

Objective To establish preoperatively the localization of the cortical projection of the inferior choroidal point (ICP) and use it as a reliable landmark when approaching the temporal horn through a middle temporal gyrus access. To review relevant anatomical features regarding selective amigdalohippocampectomy (AH) for treatment of mesial temporal lobe epilepsy (MTLE). Method The cortical projection of the inferior choroidal point was used in more than 300 surgeries by one authors as a reliable landmark to reach the temporal horn. In the laboratory, forty cerebral hemispheres were examined. Conclusion The cortical projection of the ICP is a reliable landmark for reaching the temporal horn.

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Exploring the role of the posterior middle temporal gyrus in semantic cognition: Integration of anterior temporal lobe with executive processes

NeuroImage ◽

10.1016/j.neuroimage.2016.05.051 ◽

2016 ◽

Vol 137 ◽

pp. 165-177 ◽

Cited By ~ 131

Author(s):

James Davey ◽

Hannah E. Thompson ◽

Glyn Hallam ◽

Theodoros Karapanagiotidis ◽

Charlotte Murphy ◽

...

Keyword(s):

Temporal Lobe ◽

Middle Temporal Gyrus ◽

Executive Processes ◽

Anterior Temporal Lobe ◽

Middle Temporal ◽

Semantic Cognition

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Clinical outcome of selective amygdalectomy in a series of patients with resistant temporal lobe epilepsy

Surgical Neurology International ◽

10.25259/sni_199_2021 ◽

2021 ◽

Vol 12 ◽

pp. 575

Author(s):

Guive Sharifi ◽

Mohammad Hallajnejad ◽

Samaneh Sadat Dastgheib ◽

Mahmoud Lotfinia ◽

Omidvar Rezaei Mirghaed ◽

...

Keyword(s):

Temporal Lobe Epilepsy ◽

Temporal Lobe ◽

Medial Temporal Lobe ◽

Anterior Part ◽

Effective Control ◽

Middle Temporal Gyrus ◽

Unusual Complication ◽

Middle Temporal ◽

Selective Amygdalohippocampectomy ◽

Amygdala Lesions

Background: Selective amygdalohippocampectomy is one of the main approaches for treating medial temporal lobe epilepsy (TLE). We herewith describe seven cases of amygdala lesions treated with selective amygdalectomy with the hippocampus saving procedure. Furthermore, we explain the trans-middle temporal gyrus transventricular approach for selective amygdalectomy. Methods: We studied patients with TLE who underwent selective amygdalectomy with hippocampal saving procedure between March 2012 and July 2018. We preferred the trans-middle temporal gyrus transventricular approach. We adopted pterional craniotomy with extensive exposure of the base and posterior of the temporal lobe. The posterior margin of resection in the intraventricular part of the amygdala was considered the inferior choroidal point. Medially anterior part of the uncus was resected until reaching the ambient cistern. We applied the transcortical transventricular approach for selective amygdalectomy in all patients. Results: We present 11 cases having an amygdala lesion in our series, seven of whom underwent selective amygdalectomy with hippocampal sparing. Nine patients had neoplastic lesions, and in two of them, gliosis was evident. Total resection of the lesion was achieved in all cases based on postoperative magnetic resonance imaging. No unusual complication or surgically-related new neurological deficit occurred. Conclusion: We consider the resection of the amygdala until the inferior choroidal point sufficient for the disconnection of its circuits, which results in more effective control of seizures and reduction of surgery time and complications.

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