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Olivier Boucher
Université de Montréal
InsulaPsychologyNeuroscienceEpilepsyInsular cortex
57Publications
19H-index
1,368Citations
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Publications 57
Newest
#1Daphné Citherlet (UdeM: Université de Montréal)H-Index: 1
#2Olivier Boucher (UdeM: Université de Montréal)H-Index: 19
Last. Dang Khoa Nguyen (UdeM: Université de Montréal)H-Index: 24
view all 8 authors...
Functional neuroimaging studies using auditory stimuli consistently show activation of the insular cortex. However, due to the limited temporal resolution of non-invasive neuroimaging techniques, the role(s) of the insula in auditory processing remains unclear. As the anterior insula (aI) and the posterior insula (pI) have different connections and are thought to be functionally distinct, it is likely that these two areas contribute differently to auditory processing. Our study examines the spat...
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#1Mireille Desrochers-Couture (Laval University)H-Index: 2
#2Yohann Courtemanche (Laval University)H-Index: 3
Last. Gina Muckle (Laval University)H-Index: 12
view all 10 authors...
Abstract Background Lead (Pb) exposure is associated with adverse neurological development. Most notably, it has been observed through externalizing behavior symptoms, as observed among Inuit children from northern Quebec. Evidence for a persistent neurological impact of early Pb exposure later in life is however scarce. Pb exposure may initiate a developmental cascade that increases the risk of long-term behavior problems. Objectives Testing for direct associations between childhood Pb concentr...
3 CitationsSource
#1Laura Lacazette (University of Bordeaux)
#2Olivier BoucherH-Index: 19
Last. Dang Khoa Nguyen (UdeM: Université de Montréal)H-Index: 24
view all 5 authors...
: We report the case of a patient with epilepsy who described shame and embarrassment at the beginning of his seizures. Non-invasive and invasive presurgical investigations led to resection of the polar and ventromedial portions of the right frontal lobe. Following the surgery, the patient continued to have seizures, albeit only nocturnal and with no clear aura. Subsequent removal of the right anterior insula at the junction with the frontal operculum and the posterior orbitofrontal cortex led t...
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#1Daphné Citherlet (UdeM: Université de Montréal)H-Index: 1
#2Olivier Boucher (UdeM: Université de Montréal)H-Index: 19
Last. Dang Khoa Nguyen (UdeM: Université de Montréal)H-Index: 24
view all 8 authors...
Functional neuroimaging studies suggest that the insular cortex—and more especially the anterior insula (aI)—is involved in attentional processes and plays a crucial role in the “salience network”. However, its specific role in attentional processing remains unclear, which is partly attributable to the low temporal resolution of non-invasive neuroimaging techniques. This study aims to examine the spatio-temporal dynamics of visual target processing using intracranial EEG recorded directly from t...
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#1Mélanie LemireH-Index: 17
#2Gina MuckleH-Index: 36
Last. Pierre AyotteH-Index: 54
view all 6 authors...
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#1Jimmy Ghaziri (UdeM: Université de Montréal)H-Index: 4
#2Alan TucholkaH-Index: 9
Last. Dang Khoa Nguyen (UdeM: Université de Montréal)H-Index: 24
view all 10 authors...
Hidden beneath the Sylvian fissure and sometimes considered as the fifth lobe of the brain, the insula plays a multi-modal role from its strategic location. Previous structural studies have reported cortico-cortical connections with the frontal, temporal, parietal and occipital lobes, but only a few have looked at its connections with subcortical structures. The insular cortex plays a role in a wide range of functions including processing of visceral and somatosensory inputs, olfaction, audition...
8 CitationsSource
#1Phillip FeiH-Index: 1
#2Jean-Paul SoucyH-Index: 29
Last. Dang Khoa NguyenH-Index: 24
view all 6 authors...
PURPOSE: Operculoinsular epilepsy (OIE) can be challenging to diagnose. While the value of SPECT cerebral blood flow and PET F-FDG studies for presurgical evaluation of patients with medial temporal lobe epilepsy (MTLE) is well established, it remains unclear whether they can help identify an operculoinsular epileptic focus. This study assesses the value of interictal/ictal regional cerebral blood flow (rCBF) SPECT and FDG PET for OIE diagnosis. METHODS: Eighteen patients with proven OIE who und...
1 CitationsSource
#1Olivier Boucher (UdeM: Université de Montréal)H-Index: 19
#2Daphné Citherlet (UdeM: Université de Montréal)H-Index: 1
Last. Dang Khoa Nguyen (UdeM: Université de Montréal)H-Index: 24
view all 4 authors...
Although our comprehension on the functions of the human insula has greatly benefited from functional neuroimaging and cortical stimulation studies over the past two decades, lesion studies provide unique insights on the role(s) it exerts in neuropsychological functioning. However, cerebral damage confined to the insular cortex is extremely uncommon. The characterization of the neuropsychological deficits due to insular injury is further complicated by the possible specialization of insular func...
Source
#1Bing Yu Chen (McGill University)
#2Olivier Boucher (UdeM: Université de Montréal)H-Index: 19
Last. Laura C. Gioia (UdeM: Université de Montréal)H-Index: 14
view all 5 authors...
While strokes involving the insula among other structures irrigated by the middle cerebral artery are common, isolated insular strokes are relatively rare and not well studied. Only case reports and small series of isolated insular or operculo-insular strokes can be found in the literature. Although these insular strokes are limited in size, they may result in a variety of deficits (somatosensory, motor, speech/language, vestibular, olfactory) in line with the multimodal role of the insula. Prog...
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#1Imane Samah Chibane (UdeM: Université de Montréal)H-Index: 1
#2Olivier Boucher (UdeM: Université de Montréal)H-Index: 19
Last. Dang Khoa Nguyen (UdeM: Université de Montréal)H-Index: 24
view all 10 authors...
Abstract Background Orbitofrontal epilepsy (OFE) is less known and is poorly characterized in comparison with temporal lobe epilepsy, partly because it is rare and possibly because it is unrecognized and therefore underestimated. Objective This paper aimed to better characterize seizure semiology, presurgical findings, and surgical outcomes in patients with OFE. Methods We retrospectively reviewed all confidently established OFE cases from six Canadian epilepsy monitoring units between 1988 and ...
2 CitationsSource
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