Michelle McKerral

Michelle McKerral
Université de Montréal | UdeM · Department of Psychology

Professor

About

74
Publications
100,249
Reads
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540
Citations
Introduction
Our work at the R3 LAB, founded/directed by Dr. Michelle McKerral, focuses on enhancing rehabilitation effectiveness (implementation of evidenced-based cognitive/interdisciplinary interventions) and monitoring recovery of cognitive function/social participation (mixed methods: neuropsychological, electrophysiological brain imaging, outcomes reported by clinicians/patients/caregivers) in adults with traumatic brain injury or stroke, to positively influence their short- and long-term outcomes.

Publications

Publications (74)
Article
Full-text available
Motor control deficits outlasting self-reported symptoms are often reported following mild traumatic brain injury (mTBI). The exact duration and nature of these deficits remains unknown. The current study aimed to compare postural responses to static or dynamic virtual visual inputs and during standard clinical tests of balance in 38 children betwe...
Article
Objectives This study evaluated the impact of a 12-week, 24-session multimodal group cognitive rehabilitation intervention, the Cognitive Enrichment Program (CEP), on executive functioning and resumption of daily activities after traumatic brain injury (TBI) in older individuals as compared with an active control group that received individual holi...
Article
Objectives: This study aimed to evaluate the impact of a 12-week, 24-session multimodal group cognitive intervention, the Cognitive Enrichment Program (CEP), on episodic memory in older adults with traumatic brain injury (TBI) compared to an active control group that received usual care in the form of individual holistic rehabilitation. Methods:...
Article
Full-text available
Purpose Validate the factor structure and establish internal consistency reliability of the French-Canadian version of the Mayo-Portland Adaptability Inventory (MPAI-4), using a Canadian sample of adults with traumatic brain injury (TBI) receiving post-acute rehabilitation services. Materials and methods Psychometric analysis of French-Canadian MP...
Preprint
A bstract Objectives This study aimed to evaluate the impact of a multimodal cognitive intervention, the Cognitive Enrichment Program (CEP), on episodic memory in traumatic brain injured (TBI) older adults, as compared to an active control group that received usual care in the form of holistic rehabilitation. Methods The CEP’s Memory module consi...
Preprint
Objective To validate the factor structure and establish internal consistency reliability of the French-Canadian version of the Mayo-Portland Adaptability Inventory (MPAI-4), using a Canadian sample of adults with traumatic brain injury (TBI) receiving post-acute rehabilitation services. Design Psychometric analysis of prospectively collected Fren...
Preprint
A bstract Objectives This study evaluated the impact of a multimodal cognitive rehabilitation intervention, the Cognitive Enrichment Program (CEP), on executive functioning (EF) and resumption of daily activities following traumatic brain injury (TBI) in older individuals, in comparison to an active control group having received holistic rehabilit...
Article
Full-text available
Background: In wheelchair users with a spinal cord injury (WUSCI), prolonged non-active sitting time and reduced physical activity-typically linked to this mode of mobility-contribute to the development or exacerbation of cardiorespiratory, musculoskeletal, and endocrine-metabolic health complications that are often linked to increased risks of ch...
Preprint
BACKGROUND In wheelchair users with a spinal cord injury (WUSCI), prolonged non-active sitting time and reduced physical activity—typically linked to this mode of mobility—contribute to the development or exacerbation of cardiorespiratory, musculoskeletal, and endocrine-metabolic health complications that are often linked to increased risks of chro...
Article
Full-text available
Objective: Attentional problems are amongst the most commonly reported complaints following mild traumatic brain injury (mTBI), including difficulties orienting and disengaging attention, sustaining it over time, and dividing attentional resources across multiple simultaneous demands. The objective of this study was to track, using a single novel...
Article
Full-text available
The present study aimed to measure neural information processing underlying emotional recognition from facial expressions in adults having sustained a mild traumatic brain injury (mTBI) as compared to healthy individuals. We thus measured early (N1, N170) and later (N2) event-related potential (ERP) components during presentation of fearful, neutra...
Article
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Evidence-based neurorehabilitation must be informed by the values, expectations, and goals of individuals with acquired brain injury (ABI). The Client’s Intervention Priorities (CIP)© is a person-centered tool for defining rehabilitation priorities according to self-perceived functioning. The use of the CIP tool is encouraged to promote self-determ...
Article
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Introduction: Driving an automobile is an important activity for the social participation of individuals with traumatic brain injury (TBI). Return to safe driving is usually addressed during rehabilitation, but we know little about driving behaviors in the years following TBI rehabilitation. Objective: To explore self-reported and objective (offici...
Article
Introduction/Background Of major importance for the social participation of adults with traumatic brain injury (TBI) is the possibility to drive. Return to safe driving is usually addressed during rehabilitation, but we know little about driving abilities and behaviours in the years following TBI. The aim of this study was to evaluate if individual...
Article
Introduction: Clinicians need to understand the heterogeneity of sexual problems following traumatic brain injury (TBI) for their adequate identification and treatment. Objective: To systematically identify groups of individuals with TBI showing similar patterns of sexual functioning. Methods: Forty-two individuals with TBI with a mean age of...
Poster
Full-text available
El test MoCA (Montreal Cognitive Assessment) es un test de tamizaje que ha sido concebido para valorar la integridad cognitiva de personas mayores. Sin embargo, ha sido validado con una población altamente escolarizada (Nasreddine et al., 2005). Nasreddine et al. (2015) desarrollaron el MoCA-Basic para la evaluación de personas con baja o nula esco...
Article
Objectives: To assess emotion recognition from dynamic facial, vocal and musical expressions in sub-groups of adults with traumatic brain injuries (TBI) of different severities and identify possible common underlying mechanisms across domains. Methods: Forty-one adults participated in this study: 10 with moderate–severe TBI, nine with complicated m...
Article
Little is known about the long-term consequences of traumatic brain injury (TBI) regarding risky sexual behaviour. The objectives of the study were (1) to compare risky sexual behaviour in a sample of individuals with TBI having received interdisciplinary rehabilitation with that of healthy controls, and (2) to explore the relationships between ris...
Article
Full-text available
Objective . To explore differences according to sex in sociosexuality and infidelity in individuals with TBI and in healthy controls. Participants . Forty-two individuals with mild, moderate, and severe TBI having completed a postacute TBI rehabilitation program, at least six months after injury, and 47 healthy controls. Main Measures . Sociosexual...
Article
Objective: To explore the experiences, attitudes, and needs related to service delivery regarding sexuality issues in individuals with traumatic brain injury (TBI). Methods: Community-dwelling individuals with TBI having completed a post-acute TBI rehabilitation program. The TBI sample consisted of 16 men (42.1%) and 22 women (57.9%), with an av...
Article
Full-text available
To date, very little is known about the normal development trajectory of visual texture segregation, or how it is affected by preterm birth. The goal of this study was to characterize the development of visual texture segregation using texture segregation visual evoked potentials (tsVEPs) in children born full-term and children born preterm without...
Article
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Mild traumatic brain injury (mTBI) has subtle effects on several brain functions that can be difficult to assess and follow-up. We investigated the impact of mTBI on the perception of sine-wave gratings defined by first-and second-order characteristics. Fifteen adults diagnosed with mTBI were assessed at 15 days, 3 months and 12 months after injury...
Article
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The aim of this semilongitudinal study was to investigate the development of central visual pathways in children born preterm but without major neurologic impairments and to establish their cognitive and behavioral profile at school age. Ten children born preterm were assessed at 6 months and at school age, using visual evoked potentials at both ti...
Article
Sexual quality of life involves the impact of sexual dysfunction on general quality of life. Postconcussion symptoms are frequent after traumatic brain injury (TBI) but their relationship with sexual quality of life remains unexplored. The current study aimed to: (a) compare sexual quality of life in a sample of individuals with TBI and healthy con...
Article
Full-text available
In the past decades, multiple studies have been interested in developmental patterns of the visual system in healthy infants. During the first year of life, differential maturational changes have been observed between the Magnocellular (P) and the Parvocellular (P) visual pathways. However, few studies investigated P and M system development in inf...
Article
We investigated the impact of mild traumatic brain injury (mTBI) on visuomotor processing of first and second order contrast using flickering or motion defined sinusoidal gratings. Spatial frequency was 0.5 cpd and temporal frequency was 2 Hz. Flicker consisted in contrast inversion, and motion drifted right or left. Contrast was 12.5% for first an...
Article
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According to the complexity-specific hypothesis, the efficacy with which individuals with autism spectrum disorder (ASD) process visual information varies according to the extensiveness of the neural network required to process stimuli. Specifically, adults with ASD are less sensitive to texture-defined (or second-order) information, which necessit...
Article
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During child development, physiological changes occur in the auditory cortex, which are reflected by differences in the electrophysiological signals. This study aimed to examine the age-related changes of the Mismatch Negativity component (MMN) in response to speech and non-speech stimuli in a cross-sectional design. Results revealed distinct patte...
Article
Brain injury can directly and indirectly affect important aspects related to sexuality and sexual function. In this critical review of the literature, traumatic brain injury (TBI) and sexuality are examined. A general review of the concept of sexuality and the neurological correlates of sexual function are proposed as a framework to understand the...
Article
Full-text available
Over the last two decades, the hypothesis of a magnocellular deficit in dyslexia has raised considerable interest and controversy. Using an electrophysiological procedure (visual evoked potentials, VEP), we compared magnocellular and parvocellular contrast and spatial frequency-response functions between phonological dyslexics (n = 16) and a typica...
Article
Full-text available
Individuals who have sustained a mild brain injury (e.g., mild traumatic brain injury or mild cerebrovascular stroke) are at risk to show persistent cognitive symptoms (attention and memory) after the acute postinjury phase. Although studies have shown that those patients perform normally on neuropsychological tests, cognitive symptoms remain prese...
Conference Paper
Full-text available
Background / Purpose: Most of the studies that have focused on the development of the visual system in children using visual evoked potentials (VEPs) have used stimuli soliciting only one level of visual processing. However, the perception of a visual scene requires a multitude of analytical processes ranging from the encoding of various characte...
Article
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This study examined how MTBI concomitants such as pain variables, depression, and anxiety were related to attentional functioning at different stages of recovery. Participants having sustained a MTBI who were in the earlier phase of recovery showed, compared to controls, slower reaction times and larger intra-individual variability on a Computerize...
Article
Impact of chronic pain on cognition and concomitant psychological factors This review article examines the current state of knowledge of the impact of chronic pain (CP) on cognitive/neuropsychological functioning, with a particular focus of the effect of psychological concomitants. A first section focuses on the neuropsychological functioning of pa...
Article
Full-text available
Emotional recognition appears to play a key role in relationships. Indeed, the ability to interpret emotions in the environment allows individuals to anticipate certain intentions or situations, and to respond to them in an appropriate fashion. Difficulties in psychosocial functioning (e.g., job loss, disruption of intimate relationships, reduced s...
Conference Paper
Background: Low-level visual perception in adult individuals with Autism Spectrum Disorders (ASD) is different from that of neurotypical individuals. For example, sensitivity to luminance-defined spatial information has been demonstrated to be superior in ASD, whereas sensitivity to texture-defined information is less efficiently perceived (Bertone...
Article
Preterm births (≤ 37 gestational weeks) have been identified as one of the most important cause of perinatal mortality in industrialized societies. With improvement in pre- peri- and post-natal care, it is now possible to save these children at significantly lower weight and gestational age than previously. With increasing survival rates, more and...
Article
An important challenge for researchers working with electrophysiological measures is the reduction of ocular artifacts and more specifically, the blinking phenomenon. Despite the fact that most experiments include a “do not blink” instruction in their protocol, very few studies have investigated its impact on cerebral activity, and more precisely o...
Conference Paper
Background: Whereas local luminance perception relies mainly on primary visual cortex (V1) functioning, texture perception implicates recurrent neural interactions between V1 and higher visual areas (V2, V3). Recent studies on low-level visual perception in autism have revealed processing strengths for local luminance changes across an image, conco...
Article
Full-text available
The goal of the present study was to assess the impact of mild traumatic brain injury (MTBI) on episodic memory performance in relation to attentional and executive control processes in young adults. A verbal memory paradigm manipulating attentional load (full attention or divided attention) and semantic congruency between pairs of category-target...
Article
Cet article presente la facon dont l’outil interdisciplinaire Priorites d’intervention du client (PIC) fait appel a la resilience et a l’autodetermination soutenant le client dans le choix de ses objectifs d’intervention. Le PIC a ete developpe en contexte de readaptation pour des personnes ayant un traumatisme craniocerebral. Il s’agit toutefois d...
Article
Full-text available
To evaluate low-level to complex information processing using visual electrophysiology and to examine the latter's prognostic value in regards to vocational outcome in persons having sustained a mild traumatic brain injury (mTBI). Event-related potentials (ERPs) were recorded to pattern-reversal, simple motion, texture segregation and cognitive odd...
Article
Full-text available
Orientation is one of the visual dimensions that subserve figure-ground discrimination. A spatial gradient in orientation leads to "texture segregation", which is thought to be concurrent parallel processing across the visual field, without scanning. In the visual-evoked potential (VEP) a component can be isolated which is related to texture segreg...
Article
There are important developmental changes occurring during infancy in visual cortical structures that underlie higher-order perceptual abilities. Using high-density electrophysiological recording techniques, the present study aimed to examine the development of visual mechanisms, during the first year of life, associated with texture segregation. F...
Article
Beyond issues of MTBI etiology, a key question remains the characterization and early identification of those individuals at risk of poor functional outcome. Using a retrospective analysis, the current study aimed at identifying the specific indicators related to return to work in adults with both symptomatic MTBI and functional impacts, having com...
Article
Full-text available
Previous studies have suggested that compared to first-order (FO) motion stimuli, second-order (SO) motion stimuli required more cortical time to be processed. The purpose of this study was: 1- to verify this claim with Visual Evoked Potential (VEP) and eye-hand Reaction Time (RT) measurements and 2- examine if the VEP and RT responses are similarl...
Article
Visual evoked potentials (VEPs) were recorded to textures segregated by gradients in orientation or motion. Recordings were obtained in traumatic brain-injured (TBI) subjects and in normal controls. We analyzed both the low-level VEPs (llVEPs) evoked by homogenous stimuli, as well as the components associated with texture segregation (tsVEP) obtain...
Article
Purpose: With the use of the pattern reversal visual evoked potential and the motor reaction time, we sought to differentiate anisometropic amblyopia from strabismic amblyopia on the basis of the visual transmission time. Methods: Pattern reversal visual evoked potentials and motor reaction times were obtained in nine normal subjects, eight anisome...
Conference Paper
Purpose: In humans, Visual Evoked Potentials (VEPs) are obtained to a variety of stimuli, some of which are relatively complex. The purpose of this study was to examine if the processing of more complex stimuli yields a measurable increase in retino-cortical timing. Methods: Visual evoked potentials (VEPs) and eye-hand reaction times (RT) for lumin...
Article
In an attempt to explain the existing discrepancies regarding the relationship between electrophysiological and psychophysical measurements of visual transmission time we compared, in humans, the response characteristics of the normal retino-cortical pathways with simultaneously obtained pattern visual evoked potentials (PVEP) and simple motor reac...
Article
With the use of the pattern reversal visual evoked potential and the motor reaction time, we sought to differentiate anisometropic amblyopia from strabismic amblyopia on the basis of the visual transmission time. Pattern reversal visual evoked potentials and motor reaction times were obtained in nine normal subjects, eight anisometropic and seven s...
Article
We report on a family where four of the eleven children presented with reduced visual acuities, a red-green deficit at the Farnsworth-Munsel FM 100-hue test, normal appearing fundi and unexpected electroretinographic findings. Light- (photopic) and dark- (scotopic) adapted electroretinograms (ERG) and oscillatory potentials (OPs) were obtained foll...
Article
With the use of the simple motor reaction time (RT), we examined the contribution of the hemiretinas to the timing of the pattern reversal visual evoked potential (PVEP). RTs were obtained to the reversal of a progressively dimmer check falling either on the central, nasal, temporal, superior or inferior retina. Results were correlated with the pea...
Article
Purpose. Results presented last year (McKerral et al., ARVO 1996) suggested that the eye-hand Reaction Time (RT) appeared to travel preferentially along the M-pathway while neither M nor P bias could be demonstrated with the Pattern Visual Evoked Potential (PVEP) stimuli used. The purpose of our study was to examine if the two means of measuring th...
Article
The contribution of each monocular pathway to the timing of the binocular pattern visual evoked potential was assessed in situations where a significant interocular timing discrepancy was observed. Monocular and binocular pattern visual evoked potentials to 0.5 degree checks were recorded from normal subjects, normal subjects in whom one eye was bl...
Article
We investigated the effect of reduced luminance and increased scatter on the pattern visual evoked potential and eye-hand reaction time evoked to a check size of 0.5 degrees in 10 normal subjects. Data analysis indicated that a reduction in luminance as well as an increase in scatter caused a statistically significant increase in the peak time of t...

Projects

Projects (2)
Project
This study’s overall goals are as follows: (1) to determine the effects of a 16-week wearable robotic exoskeleton–assisted walking program on organic systems, functional capacities, and multifaceted psychosocial factors and (2) to determine self-reported satisfaction and perspectives with regard to the intervention and the device.
Project
Studies on predictors of social participation specific to a French-Canadian population where there is free universal access to inpatient and outpatient rehabilitation services following TBI are scarce. Our objective is to assess the ability of pre-injury, injury-related, and post-injury variables in predicting social participation outcome after TBI.