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Clinical Interview For Psychiatric Assessment, Amresh Srivastava

Psychiatry Presentations

No abstract provided.

Cannabis & Psychosis: The Interface Emerging Frontiers For Research, Amresh Shrivastava

Psychiatry Presentations

INTRODUCTION: CANNABIS CONTINUES TO AFFECT MENTAL HEALTH. ITS ABUSE IS ON RISE GLOBALLY. IN CANADA A RISE BY 30% IN LAST TEN YEARS HAS BEEN OBSERVED IN HIGH SCHOOL STUDENTS. INTERRELATIONSHIP OF CANNABIS WITH PSYCHOSIS AND SCHIZOPHRENIA IS A COMPLEX ONE. CANNABIS IS HIGHLY COMORBID WITH PSYCHOSIS, & RELATED TO FUNCTIONAL DISABILITY AND OUTCOME. IT POSES SEVERAL CHALLENGES IN UNDERSTANDING CAUSAL RELATIONSHIP FOR COMORBIDITY, UNDERLYING NEUROCHEMICAL BASIS AND SPECIFICS OF SERVICE DEVELOPMENT. PREVALENCE OF CANNABIS VARIES FROM 20 TO 50% EARLY PSYCHOSIS. OBJECTIVE OF THIS PAPER IS TO REVIEW AVAILABLE LITERATURE TO IDENTIFY CHALLENGES FOR NEWER TARGETS OF RESEARCH AND …

Interface Of Cannabis And Early Psychosis--Priorities In Research And Service Development, Amresh Srivastava

Psychiatry Presentations

Introduction: cannabis continues to affect mental health. Its abuse is on rise globally. In Canada a rise by 30% in last ten years has been observed in high school students. Interrelationship of cannabis with psychosis and schizophrenia is a complex one. Cannabis is highly comorbid with psychosis, & related to functional disability and outcome. It poses several challenges in understanding causal relationship for comorbidity, underlying neurochemical basis and specifics of service development. Prevalence of Cannabis varies from 20 to 50% early psychosis. Objective of this paper is to review available literature to identify challenges for newer targets of research and …

Illusory Vowels Resulting From Perceptual Continuity: A Functional Magnetic Resonance Imaging Study, Antje Heinrich, Robert P Carlyon, Matthew H Davis, Ingrid Johnsrude

Brain and Mind Institute Researchers' Publications

We used functional magnetic resonance imaging to study the neural processing of vowels whose perception depends on the continuity illusion. Participants heard sequences of two-formant vowels under a number of listening conditions. In the "vowel conditions," both formants were always present simultaneously and the stimuli were perceived as speech-like. Contrasted with a range of nonspeech sounds, these vowels elicited activity in the posterior middle temporal gyrus (MTG) and superior temporal sulcus (STS). When the two formants alternated in time, the "speech-likeness" of the sounds was reduced. It could be partially restored by filling the silent gaps in each formant with …

Differential Characteristics Of “Good Outcome Schizophrenia” In A Long-Term Ten Years Study, Mumbai, India, Amresh Srivastava, Meghan Thakar, Nilesh Shah, Larry Stitt

Psychiatry Presentations

No abstract provided.

Coping With Clinical Challenges Of Risk Assessment: Towards A New Comprehensive Instrument, Amresh Srivastava, Charles Nelson

Psychiatry Presentations

No abstract provided.

Coping With Clinical Challenges Of Risk-Assessment, Amresh Srivastava

Psychiatry Presentations

No abstract provided.

Outcome In Schizophrenia: The Long-Term Good Outcome In Schizophrenia Is Not Yet Good Enough, Amresh Srivastava, Meghan Thakar

Psychiatry Presentations

The illness of schizophrenia has always been a matter of concern for its nature and extent of outcome particularly for its regional and cultural differences. The concept of outcome has been evolving and this study examines the scenario of good outcome in developing countries.

Outcome In Schizophrenia: How Good Is "Good Outcome" Schizophrenia In Long-Term In Developing Countries, Amresh Srivastava, Meghan Thakar, Nilesh Shah, Larry Stitt

Psychiatry Presentations

No abstract provided.

Complexity And Limitations Of Stress-Endocrine Research In Mental Health, Amresh Srivastava

Psychiatry Presentations

No abstract provided.

Freesurfer-Initiated Fully-Automated Subcortical Brain Segmentation In Mri Using Large Deformation Diffeomorphic Metric Mapping., Ali R Khan, Lei Wang, Mirza Faisal Beg

Brain and Mind Institute Researchers' Publications

Fully-automated brain segmentation methods have not been widely adopted for clinical use because of issues related to reliability, accuracy, and limitations of delineation protocol. By combining the probabilistic-based FreeSurfer (FS) method with the Large Deformation Diffeomorphic Metric Mapping (LDDMM)-based label-propagation method, we are able to increase reliability and accuracy, and allow for flexibility in template choice. Our method uses the automated FreeSurfer subcortical labeling to provide a coarse-to-fine introduction of information in the LDDMM template-based segmentation resulting in a fully-automated subcortical brain segmentation method (FS+LDDMM). One major advantage of the FS+LDDMM-based approach is that the automatically generated segmentations generated are …

Mood Symptoms As Comorbidity In Schizophrenia, Amresh Srivastava

Psychiatry Presentations

No abstract provided.

Effects Of Acute Ethyl Alcohol Consumption On A Psychophysical Measure Of Lateral Inhibition In Human Vision., Kevin D Johnston, Brian Timney

Brain and Mind Institute Researchers' Publications

Acute consumption of ethyl alcohol affects a variety of visual functions. However, there have been few systematic attempts to investigate the neural mechanisms underlying these effects. Here, we employed the Westheimer paradigm to investigate the hypothesis that alcohol reduces lateral inhibition within human "perceptive fields", the psychophysical analogue of physiological receptive fields. Westheimer functions obtained under alcohol and no-alcohol conditions at photopic, mesopic, and scotopic levels of adaptation showed changes consistent with an alcohol-induced decrease in lateral inhibition. We conclude that this decrease in lateral inhibition may be responsible for some of the changes in visual perception that result from …

Relapse Prevention In Schizophrenia, Amresh Srivastava

Psychiatry Presentations

No abstract provided.

The Relation Of Fr Behaviour To Aai Scales, Elspeth M. Evans, Sandi Bento, David R. Pederson, Greg Moran

Psychology Presentations

Attachment theory describes the bonds between caregivers and children that serve a protective function for children.

The FR theory developed by Main and Hesse (1990) proposes that unmonitored parental behaviour, or frightened, frightening and dissociative (FR) behaviour, stemming from a history of Unresolved/disoriented (U/d) trauma, disorganizes the attachment relationship.

The parent is a source of fear and is thus unavailable as a source of safety and protection.

Behavioural And Affective Precursors To Disorganized Attachment In The Still-Face Procedure At 4-Months, Lindsey M. Forbes, Greg Moran, David R. Pederson

Psychology Presentations

We explored whether disorganization in the SSP at 13-months could be predicted from infant affect and behaviour in the SFP at 4- months.

We hypothesized that infants in disorganized relationships would have the most difficulty regulating their affect and behaviour in the SFP.

Infants in disorganized relationships were expected to display greater negativity (e.g., crying, negative vocalizations, stress indicators such as spitting up) throughout the SFP, compared to those in organized relationships.

Both Maternal Sensitivity And Atypical Maternal Behavior Independently Predict Attachment Security And Disorganization In Adolescent Mother–Infant Dyads, Greg Moran, Lindsey M. Forbes, Elspeth Evans, George M. Tarabulsy, Sheri Madigan

Psychology Presentations

On the basis of these findings, at odds with current models of the origins of secure vs disorganized attachment, the current study examined the association between distinct qualities of maternal interaction and attachment in a single study.

The participants in the current study were adolescent mothers and their infants, a population that has been shown to be at substantial developmental risk and to exhibit a range of markedly atypical interactions with their infants (Jaffee, Caspi, Moffitt, Belsky, and Silva, 2001).

Meta-Analysis Of Alexithymia In Posttraumatic Stress Disorder., Paul A Frewen, David J A Dozois, Richard W J Neufeld, Ruth A Lanius

Psychology Publications

The authors present a meta-analysis investigating the prevalence of alexithymia in 12 studies encompassing 1,095 individuals with posttraumatic stress disorder (PTSD). A large effect size was found associating PTSD with alexithymia. Effect sizes were higher in studies of male combat PTSD samples in comparison with studies of other PTSD samples. Clinical and research directions are discussed.

Functional Imaging Of The Auditory Processing Applied To Speech Sounds, Roy D Patterson, Ingrid Johnsrude

Brain and Mind Institute Researchers' Publications

In this paper, we describe domain-general auditory processes that we believe are prerequisite to the linguistic analysis of speech. We discuss biological evidence for these processes and how they might relate to processes that are specific to human speech and language. We begin with a brief review of (i) the anatomy of the auditory system and (ii) the essential properties of speech sounds. Section 4 describes the general auditory mechanisms that we believe are applied to all communication sounds, and how functional neuroimaging is being used to map the brain networks associated with domain-general auditory processing. Section 5 discusses recent …

Neuroimaging Studies Of Psychological Interventions For Mood And Anxiety Disorders: Empirical And Methodological Review., Paul A Frewen, David J A Dozois, Ruth A Lanius

Psychology Publications

This article reviews the methods and results of published neuroimaging studies of the effects of structured psychological interventions for mood and anxiety disorders. The results are consistent with neural models of improved affective- and self-regulation, as evidenced by psychotherapeutic modulation of brain metabolic activity within the dorsolateral, ventrolateral, and medial prefrontal cortices, the anterior cingulate, the posterior cingulate/precuneus, and the insular cortices. Specific recommendations for future studies are outlined, and the clinical and theoretical significance of this research is discussed.

Selective Attention To Threat Versus Reward: Meta-Analysis And Neural-Network Modeling Of The Dot-Probe Task., Paul A Frewen, David J A Dozois, Marc F Joanisse, Richard W J Neufeld

Psychology Publications

Two decades of research conducted to date has examined selective visual attention to threat and reward stimuli as a function of individual differences in anxiety using the dot-probe task. The present study tests a connectionist neural-network model of meta-analytic and key individual-study results derived from this literature. Attentional bias for threatening and reward-related stimuli is accounted for by connectionist model implementation of the following clinical psychology and affective neuroscience principles: 1) affective learning and temperament, 2) state and trait anxiety, 3) intensity appraisal, 4) affective chronometry, 5) attentional control, and 6) selective attention training. Theoretical implications for the study of …

Clinical And Neural Correlates Of Alexithymia In Posttraumatic Stress Disorder., Paul A Frewen, Ruth A Lanius, David J A Dozois, Richard W J Neufeld, Clare Pain, James W Hopper, Maria Densmore, Todd K Stevens

Psychology Publications

Individuals with posttraumatic stress disorder (PTSD) often exhibit deficits in emotional experience and expression, which suggests that certain individuals with PTSD may be alexithymic. In this study, in a sample of 105 individuals with PTSD, clinical correlates of alexithymia included reexperiencing, hyperarousal, numbing, dissociative symptoms, and retrospectively reported experiences of childhood emotional neglect. In a subsample of 26 individuals with PTSD related to a motor vehicle accident, functional neural responses to trauma-script imagery were associated with severity of alexithymia, including increased right posterior-insula and ventral posterior-cingulate activation and decreased bilateral ventral anterior-cingulate, ventromedial prefrontal, anterior-insula, and right inferior frontal cortex …

Response, Remission & Recovery: Need To Review Outcome Measures For Schizophrenia, Amresh Shrivastava, Nilesh Shah

Psychiatry Publications

Schizophrenia is a complex neurobehavioral disorder known to be associated with poor outcome. It causes significant disability in patients and burden of care amongst relatives. Outcome in developing countries has been reported to be far better than western world, which has come into scientific scanner recently. Wide gap exists between expectations of outcome amongst patients, relatives, caregivers and professionals, which is possibly because of limitations in measurements tools. Significant number of patients remain marginalized without improvement in social & occupational functioning preventing their integration into mainstream of society despite 'clinically reported good outcome' and significant advancement in treatments. The contemporary …

A Meta-Analysis Of Cbt For Pathological Worry Among Clients With Gad., Roger Covin, Allison J Ouimet, Pamela M Seeds, David J A Dozois

Psychology Publications

Previous meta-analyses assessing the effectiveness of Cognitive Behavioural Therapy (CBT) for Generalized Anxiety Disorder (GAD) used general measures of anxiety to assess symptom severity and improvement (e.g., Hamilton Anxiety Ratings Scale or a composite measure of anxiety). While informative, these studies do not provide sufficient evidence as to whether CBT significantly reduces the cardinal symptom of GAD: pathological worry. The current meta-analysis employed stringent inclusion criteria to evaluate relevant outcome studies, including the use of the Penn State Worry Questionnaire as the main outcome variable. Results showed a large overall effect size (ES) that was moderated by age and modality …

Introduction To The Achilles Of Rational Psychology, Thomas Lennon, Robert Stainton

Philosophy Publications

No abstract provided.

Attaining And Maintaining Clarity As Self-Regulatory Goals: The Underlying Effects Of Uncertainty Orientation And Ego-Depletion, Pei-Shiuan L. Lin

Digitized Theses

According to the theory of uncertainty orientation, individuals differ in the ways in which they resolve uncertainty. Specifically, uncertainty-oriented individuals (UOs) prefer to attain clarity while certainty-oriented individuals (COs) prefer to maintain clarity. To investigate the roles cognitive resources may play in the connection between one’s uncertainty orientation and information processing style, the present study showed that active self-regulation (i.e., systematic processing) lead to impaired performances on a subsequent executive attentional task. In this experiment, participants read a counterattitudinal article which varied in personal relevance and argument strength. Following this manipulation, participants’ performances on the Stroop colour-naming task were examined. …

Creating A Sense Of Community In The Classroom Environment: An Investigation Into Collaborative Learning Among Grade 12 Students, Omadat Persaud

Digitized Theses

Although collaborative group-work has become an integral part of the learning process, students often demonstrate and express their unwillingness to participate. This study utilized an action research design to explore the reasons for such responses by examining how a small group of grade 12 students experience collaborative learning. Participants established guidelines for the collaborative learning process, researched and constructed information on global issues, and negotiated possible solutions for such issues. They simultaneously volunteered their reflections through confidential interviews and a questionnaire on their experiences in collaborative learning throughout their schooling. While acknowledging the numerous benefits they had with collaborative learning, …

English Reading Ability In Young Deaf Signers An Investigation Of Sentence Comprehension, Kathy N. Maxwell

Digitized Theses

We performed a detailed investigation of the robust correlation between ASL and English reading ability in 54 deaf students aged 7;3 to 19;0. Skilled and unskilled signers were assessed on four English sentence structures (actives, passives, pronouns, reflexive pronouns) using a four-alternative forced choice sentence-to-picture-matching task, providing a window into how ASL skill is related to English sentence comprehension. Of interest was the extent to which proficiency in LI provided a foundation for L2 learning as predicted by Cummins’ developmental interdependence hypothesis. Skilled signers outperformed unskilled signers on all sentence types. Error analysis indicated greater word recognition difficulties in unskilled …

Dynamic Combination Of Concepts During On-Line Language Comprehension, Kazunaga Matsuki

Digitized Theses

Knowledge of real-world events influences how people understand language. The present study examined whether conceptually-based expectations are generated rapidly from event knowledge. Specifically, instruments combined with specific actions to influence expectancies for ensuing patients, in contrast to Rayner, Warren, Juhasz, and Liversedge (2004). Instrument-verb-patient triplets were created from norms designed to directly tap event knowledge (Experiment 1). In self-paced reading (Experiment 2), participants read patient nouns such as paper faster when they were typical of the instrument-action pair (Susan used the scissors vs. the saw to cut). Experiment 3 showed that these results are not due to direct relations between …

Humor Used During Two Types Of Discussions Between Friends: Associations With Coping And Interpersonal Well-Being, Jennie R. Ward

Digitized Theses

Despite research and theory that suggest that humor is a social phenomenon, empirical

investigations in the field of humor have largely ignored the interpersonal context in which humor is expressed. Little is known about the relation between social uses of humor and indices of both personal and social well-being. As such, the primary aim of the present dissertation was to observationally rate humor styles exhibited during discussions between friends, and evaluate whether they are related to individuals’ ability to cope with stress and develop and maintain satisfactory relationships. In the three studies within this dissertation, humor was rated using the …