Our Professionals

Dr. Selma Greffou is the founder and owner of NEUROPSY SANITAS Clinic. She has completed a PhD in clinical neuropsychology and has been a dedicated and passionate neuropsychologist and psychologist for over 10 years, including years at the Traumatic Brain Injury Program at the Montreal General Hospital-McGill University Health Center, where she was a clinician, researcher and Assistant Professor of Neurology and Neurosurgery at McGill University, and supervised interns in clinical neuropsychology.

She has also taught clinical neuropsychology assessment and intervention at Université de Montréal. At NEUROPSY SANITAS Clinic, Dr. Greffou offers neuropsychological assessments and expertise for adolescents and adults as well as individual and group psychotherapy. Her areas of expertise include ADHD, Traumatic Brain Injury (including concussions), neurocognitive disorders and other neurological conditions (e.g., strokes, MS) and mood disorders (anxiety, depression, burnout, OCD, low self-esteem). She combines different clinical approaches (CBT-Cognitive-Behavioral Therapy, Schema Therapy, ACT-Acceptance and Commitment Therapy, Coherence Therapy) and values efficient scientifically based methods, authenticity, and compassionate care.

Dr. Greffou feels privileged by the trust that her clients put in her and makes sure to honor this trust.

Dr. Elaine de Guise holds a doctorate in neuropsychology (1999) and has worked as an expert neuropsychologist in the field of traumatic brain injury (TBI) since 1998. She worked as a clinical neuropsychologist in the CBT programme at the McGill University Health Centre between 1998 and 2012. Since 2012, she has been a Full professor in the Department of Psychology at the Université de Montréal, where she supervises and teaches internships and graduate courses (doctorate). Dr. de Guise is also an associate professor in the Department of Neurology and Neurosurgery at McGill University and a medical scientist at the McGill University Health Centre. She is also a regular researcher at the Centre de recherche interdisciplinaire en réadaptation du Montréal métropolitain (CRIR) and at the Research Institute of the McGill University Health Centre (MUHC).

Still in the field of CBT, she has published over 90 articles in international peer-reviewed journals. Her presentations by invitation and at provincial, national and international conferences have exceeded one hundred publications and appearances in recent years alone. In addition, she has served on numerous provincial and national committees, most recently on the development of a Canadian practical guide to the management of mild CBT. In 2019, she completed the course in medical expertise offered at the Université de Montréal and has been practising expertise for more than five years (organization, plaintiff or defence).

At the NEUROPSY SANITAS clinic, Dr. de Guise offers neuropsychological assessments and expertise for adults. Her neuropsychological expertise focuses specifically on CBT and concussions. She also carries out diagnostic psychological and neuropsychological assessments for adults with attention deficit hyperactivity disorder (ADHD), learning disabilities (reading and writing), intellectual disability (ID) and giftedness or high intellectual potential (HIP). She also carries out assessments for people with mental health disorders (anxiety, depression, post-traumatic stress disorder, etc.), neurological disorders (CBT, stroke, tumour, multiple sclerosis, etc.) and neurodegenerative disorders (mild cognitive impairment, Alzheimer’s, other dementias).

Her approach is based on the most up-to-date scientific data and over 25 years’ practical experience. As part of her diagnostic assessment, she also offers personalised brief intervention services, proposing various tools and recommendations based on each person’s cognitive strengths and weaknesses, with the aim of improving the person’s quality of life on a daily basis. In spite of all her impressive accomplishments and experience, Dre de Guise is very compassionate and attentive to her clients to whom she offers rigorous and humane services.

Dr. Lisa Koski is a clinical neuropsychologist with a PhD in clinical psychology from McGill University and postdoctoral training in neurorehabilitation at the University of California, Los Angeles. In 2004 Dr. Koski joined the Geriatric Cognitive Disorders Clinic at McGill University Health Centre (MUHC). She was promoted to Associate Professor at McGill, directing a research laboratory on the assessment and treatment of cognitive disorders in conditions such as stroke, dementia, infectious disease and multiple sclerosis. In 2011 Dr. Koski joined the MUHC Psychology Department, where she assessed both inpatient and outpatient adult clients with diverse mental and physical conditions. Dr. Koski has supervised over 50 neuropsychology trainees and served as the director of clinical training in Psychology from 2020-2023.

With over 20 years of experience in the clinical and research worlds, Dr. Koski has developed expertise in the areas of dementia, cognitive impacts of mental disorders, and diagnosis of autism spectrum disorder in adults. Her passions are inquiry, discovery, and interpersonal connectedness, and she is grateful to be able to pursue these passions through her work with clients.  She combines psychological inquiry with the tools of neuropsychology, to help clients understand the source of their difficulties and identify ways to achieve better functioning at school, at work and in their personal lives. She respects the diverse backgrounds and experiences of her clients and values their trust, committing to offer informed insights and recommendations for next steps toward better health.

I’ve been a practicing clinical psychologist for over 40 years and have worked with individuals, couples and groups in a variety of settings.

My approach to psychotherapy is rooted in Attachment Theory, which holds that secure attachments with our primary caregivers in childhood provide the foundation from which we grow into autonomous adults able to create secure bonds with others.

It is also inspired by Gestalt Therapy principles and techniques which aim to increase awareness of the present moment, to develop one’s ability to be in contact with self and others, and to resolve unfinished business from the past. I trained in this approach for 2 years at the Gestalt Counselling and Training Centre in Montreal.

For the last 20 years l have worked primarily with adults who have experienced trauma resulting in PTSD. I developed my skills in working with traumatic stress during a 2-year training program at Traumatys, a clinic and training center here in Montreal.

I view psychotherapy as a collaborative process which can help clients discover creative, adaptive solutions to some of life’s important challenges. In this process, I make sure to offer my clients a benevolent, non-judgemental and warm posture based on acceptance and authenticity. I offer the necessary support to allow the person to achieve the potential within.

Dr. Marie-Ève Marchand-Krynski completed a Ph.D. degree in neuropsychology (research and intervention) in 2018 from l’Université de Montréal. She specializes in pediatric neuropsychology. She has acquired her expertise while working with children, adolescents, and young adults with cognitive impairments. She specializes in diagnostic cognitive assessments with an approach based on the biopsychosocial understanding of a child’s development. Dr. Marchand also currently works for Ste-Justine Hospital, where she is perfecting her expertise in pediatric neuropsychology by working within the department of pedopsychiatry (differential diagnosis between cognitive and mental health conditions) and that of surgery-trauma (rare diseases and traumatic brain injury).

As a clinician, Dre Marchand-Krynski is professional, rigorous and very compassionate. Her clients and patients appreciate her authenticity, her patience, and her dedication to making them feel heard and making her work accessible by taking the time to answer questions and explain, in simple words, complex concepts. She also has an acuity for each person’s qualities and potential and aims at helping her clients blossom.