Patrick Bermudez

Patrick Bermudez
McGill University | McGill · Montreal Neurological Institute

About

23
Publications
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Publications

Publications (23)
Preprint
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NeuroLibre is a preprint server for neuroscience Jupyter Books, blending code, visualization and narrative text into one document. NeuroLibre archives the environment, code and data and also implements a technical review to ensure readers can reproduce the work. NeuroLibre offers an online platform where readers can reproduce or modify each preprin...
Preprint
Large-scale data-centric challenges faced by neuroscientists, such as improving reproducibility and data reuse, could be overcome by adopting open science practises. The Canadian Open Neuroscience Platform (CONP) takes a multi-faceted approach to enabling open neuroscience, aiming to make research, data, and tools accessible to everyone, with the u...
Article
Full-text available
In recent years, the replicability of neuroimaging findings has become an important concern to the research community. Neuroimaging pipelines consist of myriad numerical procedures, which can have a cumulative effect on the accuracy of findings. To address this problem, we propose a method for simulating artificial lesions in the brain in order to...
Article
We observed how information about the structure of tone sequences modulates cortical responses in the context of a standard short-term memory (STM) task. Participants heard two sequences of one, three, or five tones (203 ms on, 203 ms off) interspersed by a silent interval (2 s) and decided whether the sequences were the same or different. In exper...
Article
Full-text available
Mounting evidence suggests that mild traumatic brain injuries (mTBI) have long-term effects that interact with the aging process to precipitate cognitive decline. This line of research predicts that early exposure to brain trauma is particularly detrimental to long-term brain integrity. However, a second line of research into the effects of age at...
Article
Full-text available
Behavioral and neuropsychological studies have suggested that tonal and verbal short-term memory are supported by specialized neural networks. To date however, neuroimaging investigations have failed to confirm this hypothesis. In this study, we investigated the hypothesis of distinct neural resources for tonal and verbal memory by comparing typica...
Article
Full-text available
Objective: Semantic memory impairment has been documented in individuals with amnestic Mild cognitive impairment (aMCI), who are at risk of developing Alzheimer's disease (AD), yet little is known about the neural basis of this breakdown. The aim of this study was to investigate the brain mechanisms associated with semantic performance in aMCI pat...
Article
The maintenance of information in auditory short-term memory (ASTM) is accompanied by a sustained anterior negativity (SAN) in the event-related potential measured during the retention interval of simple auditory memory tasks. Previous work on ASTM showed that the amplitude of the SAN increased in negativity as the number of maintained items increa...
Article
Full-text available
We examined the electrophysiological correlates of retention in auditory short-term memory (ASTM) for sequences of one, two, or three tones differing in timbre but having the same pitch. We focused on event-related potentials (ERPs) during the retention interval and revealed a sustained fronto-central ERP component (most likely a Sustained Anterior...
Article
Both attention and masking sounds can alter auditory neural processes and affect auditory signal perception. In the present study, we investigated the complex effects of auditory-focused attention and the signal-to-noise ratio of sound stimuli on three different auditory evoked field components (auditory steady-state response, N1m, and sustained fi...
Article
Full-text available
Behavioral assessment of Absolute Pitch (AP) ability over the better part of the last century has strongly suggested that a variety of proficiency levels exists and can only be more comprehensively described with the use of rigorous testing providing precise and unbiased reaction times for all responses. This study describes the design, implementat...
Article
Full-text available
Absolute pitch has proved useful as an alternative perspective from which to investigate various cognitive faculties. A new functional magnetic resonance imaging study published recently in BMC Neuroscience adds new data to the ongoing debate concerning the neural underpinnings of this unusual ability.
Article
Full-text available
We used a multimethod approach to investigate the neuroanatomical correlates of musicianship and absolute pitch (AP). Cortical thickness measures, interregional correlations applied to these thicknesses, and voxel-based morphometry (VBM) were applied to the same magnetic resonance imaging data set of 71 musicians (27 with AP) and 64 nonmusicians. C...
Article
There exists a controversial literature regarding gross morphological differences in the brain structure of musicians as compared to nonmusicians. Several authors have shown changes in diverse cerebral regions associated with musical training, notably in the motor and auditory cortices (e.g., Refs. 1 and 2), but these have not always been consisten...
Article
A previous positron emission tomography (PET) study of musicians with and without absolute pitch put forth the hypothesis that the posterior dorsolateral prefrontal cortex is involved in the conditional associative aspect of the identification of a pitch. In the work presented here, we tested this hypothesis by training eight nonmusicians to associ...
Article
Studies of sexual dimorphism in the corpus callosum (CC) have employed a variety of methodologies for measurement and normalization but have yielded disparate results. The present work demonstrates how in some cases different manipulations of the same raw data, corresponding to different commonly used methodologies, produce discordant results. Mids...
Article
Full-text available
Neural correlates of the often-powerful emotional responses to music are poorly understood. Here we used positron emission tomography to examine cerebral blood flow (CBF) changes related to affective responses to music. Ten volunteers were scanned while listening to six versions of a novel musical passage varying systematically in degree of dissona...
Article
The unusual ability of absolute pitch (AP) affords us the opportunity to study a circumscribed behaviour which can be clearly operationalized and requires complex cognitive function in its execution. It serves as a model for a number of perceptual and mnemonic functions as well as developmental interactions between biological predispositions and sp...

Projects

Project (1)
Project
Our goal is to better understand the enhancements related to music training that are observed in the frequency following response (FFR). We use a multimodal approach that combines several imaging techniques (EEG, MEG and MRI) with machine-learning classifiers.