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Biomedical subjects

C A Clark

Publications and source records attributed to C A Clark.

At least 91 records · Page 5Linked to original sources
PubMed1979

Effect of information feedback on temporal discrimination in concurrent and post-feedback measures.

College students estimated time intervals (5, 6, 7, 8, and 9 sec.) where one group (N = 20) received information feedback in terms of actual interval durations and a second group (N = 18) received no information. Theshold measures were then taken for all subjects using the method of constant stimuli (comparison stimuli of 5, 6, 7, 8, and 9 sec. and a 7-sec. standard). In addition to increased accuracy and consistency of judgments, the feedback group showed a decreasing Weber fraction during the estimation phase, while the Weber fraction for the no-feedback group increased. The feedback group retained only a slight advantage in subsequent threshold measures; group differences in difference thresholds and derived nonparametric estimates of d' were nonsignificant.

Differential Threshold↗
PubMedDate not supplied

A framework based on spin glass models for the inference of anatomical connectivity from diffusion-weighted MR data - a technical review.

A family of methods aiming at the reconstruction of a putative fascicle map from any diffusion-weighted dataset is proposed. This fascicle map is defined as a trade-off between local information on voxel microstructure provided by diffusion data and a priori information on the low curvature of plausible fascicles. The optimal fascicle map is the minimum energy configuration of a simulated spin glass in which each spin represents a fascicle piece. This spin glass is embedded into a simulated magnetic external field that tends to align the spins along the more probable fiber orientations according to diffusion models. A model of spin interactions related to the curvature of the underlying fascicles introduces a low bending potential constraint. Hence, the optimal configuration is a trade-off between these two kind of forces acting on the spins. Experimental results are presented for the simplest spin glass model made up of compass needles located in the center of each voxel of a tensor based acquisition.

Algorithms↗
PubMedDate not supplied

Self-disclosure and the treatment of substance abuse.

Identification and treatment of the substance-abusing physician has led to outcome studies focusing on years of abstinence and resultant work performance, but little has been written addressing the therapeutic changes recovery brings in the personal lives of these physicians or in their approach to similarly addicted patients. The unique position of recovering psychiatrists engaged in the treatment of substance-abusing patients has not been addressed. Self-disclosure is a major issue and becomes unavoidable if the psychiatrists meet their patients at Twelve-Step meetings. This paper begins a discussion of the issues of self-disclosure and anonymity for recovering psychiatrists. The informal method used to gather information highlights the sensitivity of these issues for both patients and psychiatrists. The clinical examples show the importance of evaluating the psychodynamic impact of self-disclosure on the patient, the psychiatrist, and their treatment relationship.

Adult↗
PubMedDate not supplied

An exploratory study of how occupational therapists develop therapeutic relationships with family caregivers.

Family members, who provide 70% to 80% of all long-term care, have often been perceived by occupational therapists as a barrier to, rather than a partner in, effective care for elderly persons. This perception suggests that in order to build effective partnerships to manage complex issues, occupational therapists working with elderly persons must develop effective strategies for involving family members in the therapeutic process. This article describes a pilot study that examined how occupational therapists engage family caregivers of elderly persons receiving home care services. A qualitative descriptive approach was used to explore the behaviors demonstrated by two occupational therapists when working with family caregivers. The findings point to four primary types of occupational therapist-caregiver interaction, categorized as: caring, partnering, informing, and directing. These interaction styles were compared with current literature describing state-of-the-art occupational therapy practices with older adults and family caregivers. An emphasis was placed on examining how therapeutic interactions can evoke different caregiver responses and influence the development and maintenance of collaborative therapeutic relationships. The results of this pilot study can serve as a framework for further exploration of interactive strategies that promote caregiver empowerment and ultimately influence the ability of families to assume responsibility for the long-term care required by many chronically disabled older adults.

Aged↗