Objective: The primary goal of this study was to investigate the possibility of a relationship between traumatic brain injury (TBI) and adolescent autonomy. Adolescents and their parent reported on lhree types of autonomy; renective autonomy, reactive autonomy, and functional independence. Adolescent cognitive skills, reading ability, and affective states, along with parent perceptions of !.he adolescents' executive functioning and parent-related stress were assessed in an attempt to elucidate the mechanisms through which TBI and autonomy interact. Participants and Methods: Participants included 20 adolescents, 12 to 19 years of age, with a history ofTS! and 19 age· and gender·matched adolescents wilh no history of TBI. Each adolescent was accompanied by one parent who completed parental reports while the adolescent underwent testing and completed questionnaires. Adolescents were screened for cognitive functioning and reading ability using subtests ofthe Reynolds Intellectual Assessment Scale (RIAS) and the Wide Range Achievement Test _ 4th Edition (WRAT4). Adolescents then completed questionnaires to assess depression (Beck Depression Inventory - 2nd Edition, SOl-TO and anxiety (Beck Anxiety Inventory, BAI). Lastly but most importantly. the adolescents completed questionnaires to assess reflective autonomy using a modified version of the Ryff Psychological Well Being Scale, and reactive autonomy (Adjectives Checklist, ACL). Meanwhile, parents completed a brief demographics questionnaire, a report of their adolescent's functional independence (Adaptive Behavior Assessment System II. ABAS-IO. executive functioning (Behavior Rating Inventory of Executive Functioning, BRIEF), and parenting-related stress (Stress Index for Parents of Adolescents, SlPA). Results: Significant group differences were noted on measures of reflective autonomy, but not on reactive aUlonomy. A history ofTBI was also influential in parent ratings of functional independence and executive functioning, but not levels of parent stress. The adolescents with TBI did not repon higher levels of depression or anxiety. Within the TBI group, significant correlations were found between parent ratings of adolescent functional independence and executive functioning, yet no correlations were found between adolescent and parent reports of autonomy, adolescent reports of autonomy and affect, or between parent ratings of adolescent functional independence/executive functioning and parent stress levels. Conclusions: These findings provide some indication of a potential relationship between TBI and both self-repons and parent repons of autonomy. Adolescent's with a history of TBI in this sample felt less in control of their decision making process regarding actions/behaviors, and were viewed by their parents as are less functionally independent. These findings do not provide any indication of a potential relationship between TBI and an adolescent's ability to resist external innuence. However, the number of participants was limited and there were several other factors which complicate the interpretation of this lack of difference between adolescents with and without TBI. Clearly. further investigation of this phenomenon is warranted, yet these findings suggest that clinicians working with adolescents with brain injury might benefit by considering both internal and external perceptions of autonomy in treatment implementation. / Graduate

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Music training has been suggested to lead to an enhancement in the neural activity associated with music processing. It has been proposed that brain signal complexity is a reflection of the functional capacity of that neural system. The present study tested the hypothesis that musicians have a larger repertoire of brain activity associated with musical perception then nonmusicians. We used multiscale entropy to capture the complexity of the MEG signal while musicians and nonmusicians listened to different melodies. We observed that initial melody presentation elicited higher complexity in musicians compared to nonmusicians. Brain signal complexity decreased in both groups as a function of stimulus repetition. We propose that the neural networks that underlie auditory processing have a more diverse range of functioning in musicians, as compared to nonmusicians. Repetition reduces the amount of information processing and corresponding brain signal complexity.

Music training has been suggested to lead to an enhancement in the neural activity associated with music processing. It has been proposed that brain signal complexity is a reflection of the functional capacity of that neural system. The present study tested the hypothesis that musicians have a larger repertoire of brain activity associated with musical perception then nonmusicians. We used multiscale entropy to capture the complexity of the MEG signal while musicians and nonmusicians listened to different melodies. We observed that initial melody presentation elicited higher complexity in musicians compared to nonmusicians. Brain signal complexity decreased in both groups as a function of stimulus repetition. We propose that the neural networks that underlie auditory processing have a more diverse range of functioning in musicians, as compared to nonmusicians. Repetition reduces the amount of information processing and corresponding brain signal complexity.

Brain injuries (BI) are the leading cause of death and disability among people under the age of 45 (Ontario Brain Injury Association, 2004). With improved survival rates, more individuals each year return to the community with impairments and disabilities caused by their injury (Smith, Magill–Evans, and Brintnell, 1998). Adjusting to these impairments may affect the individual’s subjective well being; therefore, attention to community reintegration by researchers, policy developers, and health care providers is important. Using qualitative research methods and systems theory as the theoretical framework, the purpose of the study was to examine community reintegration from the perspectives of three key groups: individuals with BI, community based agencies, and primary care physicians regarding the meaning attributed to “successful reintegration”, as well as the key characteristics and barriers experienced during reintegration. “Successful” reintegration appears to be an individually derived concept. Participants consistently identified the need for information about the process of community reintegration, and resources available both during rehabilitation and after discharge from the hospital as being both a key aspect of community reintegration, as well as a barrier experienced during the return to community.

Linking brain regions or neural circuits to specific affective symptoms could help elucidate the neural mechanisms of affective states as well as antidepressant treatment effects. Much research has implicated the anterior cingulate cortex (ACC), mid-dorsolateral frontal cortex (MDLFC), and a "frontocingulate" (i.e., MDLFC-ACC) circuit in sad affect and depression as well as the mood response to antidepressant treatment, including 10-Hz repetitive transcranial magnetic stimulation (rTMS) applied over the MDLFC. While the empirical support for a direct role of the MDLFC in affect is unclear, a wealth of research supports the ACC as an interface between action and emotion (Paus, 2001). In a series of experiments using behavioural, brain imaging and brain stimulation techniques we investigated the involvement of the ACC and an MDLFC-ACC (i.e., frontocingulate) circuit in an "action and emotion" relevant behaviour, namely, paralinguistic aspects of speech production. (e.g., speech pitch and loudness). In Experiment 1, we examined the relationship between affect and paralinguistic aspects of speech and in Experiment 2 we investigated the role of the ACC in mediating this phenomenon. Next, applying our knowledge of the role of the ACC in affect-relevant behaviour, we combined rTMS with a speech task (Experiment 3) and with PET (Experiment 4) in order investigate further the possibility that influencing brain activity in a frontocingulate circuit may contribute to the known mood effects of rTMS applied over the MDLFC. Taken together, our results demonstrated a role for the ACC in pitch variation during affective states and suggested that changes in affect and pitch variation following 10-Hz rTMS applied over the left MDLFC may involve changes in neural activity in a network of brain regions widely implicated in affect, including a frontocingulate circuit. The findings of this collection of studies take us a step further toward understanding the r

Typescript. / Thesis (Ph.D.)--University of Hawaii, 1985. / Bibliography: leaves 199-213. / Photocopy. / xi, 213 leaves, bound ill. 29 cm

Typescript. / Bibliography: leaves [89]-97. / vii, 106 l illus., tables