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Biomedical subjects

L Van Egeren

Publications and source records attributed to L Van Egeren.

7 recordsLinked to original sources
PubMed1992

Periodic limb movement disorder is associated with normal motor conduction latencies when studied by central magnetic stimulation--successful use of a new technique.

This study prospectively tested the hypothesis that patients with periodic limb movement disorder (PLMD) have longer motor conduction latencies than normals. Six healthy adults, 13 patients with PLMD, and 8 patients with long-term multiple sclerosis (MS) had recordings of motor conduction latencies during wake and sleep. MS subjects were included only to show that we could detect prolongation of central conduction; nonMS subjects were used to test the hypothesis. Subjects had no other medical or sleep problems. A novel magnetic stimulator, the Cadwell MES-10, was discharged over the vertex and the C7 cervical spine. It triggered compound muscle action potentials that were recorded in the abductor digiti minimi in the hand. The conduction latencies were the total conduction time (TCT), measured vertex to hand, and the peripheral conduction time (PCT), measured C7 to hand. The difference was the central conduction time (CCT). Only TCT could be obtained during sleep. Supporting the use of TCT as an indirect measure of central conduction was that, in all waking subjects, TCT correlated with CCT (r = 0.91, p = 0.001) but not with PCT. Reliabilities during wake and sleep were 0.95 or higher for TCT and PCT measurements. Waking CCT was greater in MS subjects (13.77 milliseconds) than those without MS (9.21 milliseconds), p = 0.001. Sleeping TCT was much less impressive in distinguishing MS subjects [27.08 milliseconds in nonrapid eye movement (NREM) sleep; 28.64 milliseconds in rapid eye movement (REM) sleep] from nonMS subjects (24.45 milliseconds in NREM; 24.84 milliseconds for REM), p = 0.07 for NREM and p = 0.04 for REM.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1983

Presleep cognitions and attributions in sleep-onset insomnia.

This research examined the role of cognitive factors (attributions about the causes of sleep difficulties and presleep cognitive activity) in sleep-onset insomnia. Thirty-four subjects, including 13 mild to extreme insomniacs, were interviewed and then spent 5 consecutive nights in a sleep laboratory. In a multiple regression paradigm predictor measures included attribution ratings of sleep difficulty, perceived control of presleep cognitive content, and affect associated with presleep cognitions. Criterion measures included laboratory measured objectives and subjective sleep-onset latency, a score presenting the difference between objective and subjective laboratory measures of sleep-onset latency, interview-measured subjective sleep-onset latency, and degree of overall concern and presleep concern about initiating sleep. The results of multiple regression analyses suggested that the content of presleep cognitions and the attributions of sleep difficulties were significantly associated with several subjective measures of sleep-onset latency or concern with initiating sleep. None of the predictor measures was significantly associated with objectively measured sleep-onset latency. Implications for cognitive theories of sleep-onset insomnia and for the psychophysiologic-subjective dimension of insomnia are discussed.

Adolescent↗
PubMed1976

A behavioral framework for the study of human disease.

A frame of reference for studying human disease is presented. An individual's social behavior serves as the orienting theme. Special forms of social behavior are in effect what tie an individual to his physical and social space, and alterations here can lead to disease. Causes of disease can thus be linked to behaviors of the individual. Although associated with basic changes in the psysiologies and chemistries of the individual, disease invariably comes to affect the individual's behavior and adaptation. Different ways in which such behavioral changes can be conceptualized are discussed. The individual relies on these behavioral changes as the data for evaluating his disease and deciding about medical treatment. A model of how an individual processes information about illness and makes decisions designed to alleviate his condition is presented. Finally, the rationale and value of keeping behavior and adaptation in mind when studying disease are discussed.

Adaptation, Psychological↗
PubMedDate not supplied

Efficacy of a one-month training block in psychosocial medicine for residents: a controlled study.

STUDY OBJECTIVE: To determine the efficacy of a comprehensive, one-month psychosocial training program for first-year medical residents. DESIGN: Nonrandomized, controlled study with immediate pre/post evaluation. Limited evaluation of some residents was also conducted an average of 15 months after teaching. SETTING: Community-based, primary care-oriented residency program at Michigan State University (MSU). SUBJECTS: All 28 interns from the single-track MSU residency program during 1986/87-88/89 participated in this required rotation; there was no dropout or instance of noncompliance with the study. In the follow-up study in 1989, all 13 available trainees participated. Of 20 untrained, volunteer controls, ten were second/third-year residents in the same program during 1986/87 and ten were interns from a similar MSU program in Kalamazoo, MI, during 1988/89. TEACHING INTERVENTION: An experiential, skill-oriented, and learner-centered rotation with competency-based objects focused on communication and relationship-building skills and on the diagnosis and management of psychologically disturbed medical patients. MEASUREMENTS AND MAIN RESULTS: The two subsets of the control group were combined because residents and training programs were similar and because means and standard deviations for the subsets were similar on all measures. By two-way analyses of variance (group x gender), the trainee group showed significantly greater gains (p less than 0.001) on questionnaires addressing knowledge, self-assessment, and attitudes; a mean of 15 months following training, there was no significant deterioration of attitude scores. All trainees were also able to identify previously unrecognized, potentially deleterious personal responses using a systematic rating procedure. Residents' acceptance of the program was high. CONCLUSIONS: Intensive, comprehensive psychosocial training was well accepted by residents. It improved their knowledge, self-awareness, self-assessment, and attitudes, the latter improvement persisting well beyond training.

Adult↗
PubMedDate not supplied

Stress and coping and behavioral organization.

This article presents a new integrative theoretical framework for stress and coping centered on the concept of behavioral organization and the notions that stress disorganizes behavior and coping aims at reorganizing it. Functional analysis of behavioral organization leads to identification of four core domains of control and to a functional classification of types of stressful conditions, types of negative emotions, and types of coping functions linked directly to the control domains. The control domains are represented cognitively by four postulated kinds of beliefs or views people hold with respect to undertaking an action: performance, process, prospect, and profit beliefs. The four basic control beliefs form the core of the present coping belief model of coping. Recognition of the underlying structure of behavior, and of functional categories of stress and coping related to it, can advance theory and research on stress and coping by enriching its psychological content, improving research designs, and leading to reexamination, reinterpretation, and integration of findings existing in the literature that presently are fragmented and unconnected.

Adaptation, Psychological↗
PubMedDate not supplied

A large-scale, short-term, media-based weight loss program.

BACKGROUND: This article describes the evaluation of a media-based weight loss and nutrition program. METHODS: Fifteen broadcasts were aired on a Chicago television news program over a three-week period in November of 1986. Some participants (n = 37) received the television program and an accompanying manual, and some (n = 37) received, in addition to the television and media interventions, encouragement to attend self-help groups dealing with obesity. RESULTS: Repeated measures analysis of variance tests were performed, and planned comparisons were conducted only if main effects were significant. At posttesting, those participants attending the self-help groups lost an average of more than nine pounds, whereas those provided only the television program and manual had decreased by less than a pound. Those attending the groups had significantly decreased their percent of dietary fat intake, significantly increased aerobic exercise, and had significantly more hopefulness, motivation, and stimulus control. DISCUSSION: The findings suggest that short-term mass media programs by themselves were probably not very effective, but when supplemented by a self-help manual and support groups may be able to produce significant short-term weight loss.

Adult↗