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Biomedical subjects

E B Brody

Publications and source records attributed to E B Brody.

At least 19 recordsLinked to original sources
PubMed2000

The effect of a psyching strategy on neuromuscular activation and force production in strength-trained men.

Force and electromyographic (EMG) activity of the biceps and triceps brachii were measured in 15 strength-trained men during maximal isometric action of the forearm flexors, with the elbow at 90 degrees, following 20-s periods of psyching (PSY), reading aloud (RA), and mental arithmetic (MA). Perceived arousal and attentional focus ratings for PSY were greater than those obtained for RA and MA, which were undifferentiated. Perceived effort, biceps and triceps EMG, and maximal force did not differ across conditions. Therefore, in highly trained men under conditions of brief exertion, when the biomechanics of the muscular action were controlled, psyching resulted in a perception of enhanced readiness but did not influence force or muscular activation differently from psychological states that were preceded by distraction.

Adult↗
PubMed1998

Respiratory sinus arrhythmia during exercise in aerobically trained and untrained men.

Respiratory sinus arrhythmia (RSA) was examined in aerobically trained (AT) and untrained (NT) college-aged males during 12 periods consisting of a 3-min sitting baseline, six common 3-min absolute exercise stages, and five 3-min recovery stages that followed voluntary exhaustion to determine the relationship of work and training status to parasympathetic influence upon the heart. RSA systematically decreased during absolute exercise, was observed at heart rates (HR) above 100 beats x min(-1), and progressively increased during recovery. Additionally, independent of work stages, comparative regression analyses were conducted for both the exercise and recovery phases, separately, in which HR was regressed on RSA, as well as RSA on % VO2max, to contrast the obtained relationships for the AT and NT. No differences were revealed as a function of endurance training status as the slopes and intercepts obtained for the two groups from each of these analyses were similar. The within-subject correlations between RSA and % VO2max, calculated for each of the individuals across all 12 periods, were consistently negative. Between-subjects correlations of RSA with RR and tidal volume were predominantly nonsignificant, indicating that RSA, as measured here, is independent of individual differences in ventilatory activity and, as such, can be compared between groups during exercise. The findings demonstrate that RSA is detectable during both exercise and recovery, even at HR beyond 100 beats x min(-1), and reveals a similar relationship to HR and metabolic state in both aerobically trained and untrained populations.

Adult↗
PubMed1992

The effect of psychological strategies upon cardiorespiratory and muscular activity during treadmill running.

Twelve aerobically trained males (age 22 +/- 1.3 yr, range 18-31) were studied to determine the effects of VE and EMG feedback upon cardiorespiratory and muscular activity during one segment of a continuous 36-min bout of treadmill running just below ventilatory threshold (VT). Ventilatory, metabolic, cardiovascular, RPE, and EMG variables recorded during a 12-min feedback segment were compared with those observed during 12-min attentional distraction and control conditions. The three treatments were counterbalanced. Mean VO2 (2987 ml.min-1) remained constant across the three periods as did VCO2 (3102 ml.min-1), HR (168 bpm), RQ (0.95), and O2 pulse (18.5 ml.beat-1). However, VE was significantly reduced during feedback (Fb) as compared with both the distraction (D) and control (C) conditions (mean +/- SE: 83.2 +/- 3.6 vs 86.6 +/- 4.2 and 87.8 +/- 4.2 l.min-1, respectively). This effect was marked by a reduction in respiratory rate (RR) (41.1 +/- 2.1 vs 44.5 +/- 1.9 and 46.8 +/- 1.9 breaths.min-1 for Fb, D, and C, respectively) and an increase in tidal volume (TV) (2115 +/- 144 vs 1904 +/- 110 and 2020 +/- 102 ml.breath-1 for Fb, D, and C, respectively). These changes resulted in significant reductions in VE/VO2 (26.5 +/- 0.7 vs 28.9 +/- 1.0 and 28.3 +/- 0.9 ratio magnitudes), VE/VO2 (28.1 +/- 0.8 vs 30.2 +/- 1.0 and 29.7 +/- 1.0 ratio magnitudes), and PETO2 (105.5 +/- 1.0 vs 108.4 +/- 1.1 and 107.6 +/- 1.2 mm Hg) during Fb as compared with D and C, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1987

Rethinking the unconscious: the unacknowledged contribution of Edward Sapir to Claude Lévi-Strauss and Jacques Lacan.

Sapir defined the human unconscious as a mechanism (based on phonemes learned during language acquisition) which imposes linguistic forms upon out-of-awareness 'psychic content' or 'elements of experience', rather than as a repository of repressed impulses or ideas striving for expression. In contemporary terms this activity may be regarded as unconscious information processing prequisite to experiential residues becoming available to conscious attention. It also imposes (as in 'projecting') the observer's cultural forms, modified by developmental experience, upon communications from others. This view antedates Lévi-Strauss' unconscious which 'transforms' elements of the past 'into language' and Lacan's unconscious structured 'like a language'. The clinical psychoanalytic study of out-of-awareness mental processes, understood as a dialectic shaped by the discrepancy in power between analyst and patient, illuminates the unstable relationship between the words or signifiers selected by the patient from the infinite lexicon of available, usually socially shared, verbal or non-verbal language (his plane of expression) and his varied preconscious collections of signifieds, including cultural as well as personal developmental knowledge (his plane of content).

Freudian Theory↗
PubMed1985

Patients' rights: a cultural challenge to Western psychiatry.

To some degree, all psychiatric encounters, by constraining behavioral variation and autonomous decision making, threaten a personhood already impaired by illness. The challenge presented by this and other factors in Western psychiatry is how to resolve the ethical dilemmas of justice, autonomy, and beneficence inherent in contemporary hospitalization and treatment practices for severely mentally ill persons. The author discusses this challenge in terms of the physician-patient contract, clinical standards for limiting autonomy, and the Kantian concept of equality of mutual respect. The legal code in relation to psychiatry has evolved into a contemporary interpreting mechanism for Kantian cultural tradition.

Behavior Control↗
PubMed1981

The clinician as ethnographer: a psychoanalytic perspective on the epistemology of fieldwork.

Ethnography is process yielding a particular kind of knowledge, From the psychoanalytic perspective this bears on the question: how many individual lives which report their own experience, but cannot directly apprehend the unconscious factors behind that experience, be related to social life which does not report itself but is observed and interpreted by others? The person of the ethnographer and ethnographer-informant relationships are considered in this respect. Clinicians' informants include people to whom they relate in the course of adaptation to the new community; those who are help-seeking (patients) with whom their relationship is both therapeutic and investigative; and clients in health-service (e.g., family planning)contexts who may be studied with tests and structured interviews. The clinician's status, role, helping and scientific values are examined as factors determining the nature of knowledge gained under these various circumstances. To the degree that the clinician is an intentional transformer, data emerge as the informant's consciousness changes in the therapeutic or research process. Research or therapy-aimed interventions based on psychoanalytic theory add their own epistemological problems to the process.

Anthropology, Cultural↗
PubMed1981

Can mother-infant interaction produce vulnerability to schizophrenia?

Schizophrenia is regarded as a final common behavioral syndrome which may be arrived at though a variety of routes. Even with a probably genotype, environmental influence seems necessary for the phenotype to appear. The problem concerns the likelihood of an early experience-induced sequence of events within the person of infant and later adult vs. a continuing pathogenic environment. Either may or may not interact with a continuing genic factor(s) as a source of vulnerability. Vulnerability is here, then, viewed as epigenetically evolving via individual-environment transactions throughout life (although with major impacts from conception through adolescence). At any point, therapeutic intervention may preclude or minimize the actualization of the pathogenic potential. It may begin during pregnancy, with attention to such factors as diet, drugs, physical stress, and illness, influencing fetal development and obstetrical manipulations and the birth process. All influence earliest mother-infant interaction from the point of view both of the infant's evocation of maternal behavior and maternal responsivity. Therapeutic interventions also include attention to the multigenerational context of earliest interaction, with special reference to a woman's relationships with her own mother. At every point, nonspecific protective or pathogenic factors such as social support or stressful precipitating events may become important. Socioeconomic status appears to have a powerful nonspecific influence as the core of a cluster of factors which exert an enduring influence from infancy to adulthood. A continuing specific factor may reside in distorted communicative reciprocity between parent an child rooted in the preverbal period of infant development. Context-mediated cerebral deficits may influence learning capacity, hedonic capacity, behavioral rigidity, and many other factors leading ultimately to impaired social competence and increased vulnerability.

Adaptation, Psychological↗