Search Results - "ZAHN, THEODORE P."

Autonomic activity in relation to symptom ratings and reaction time in unmedicated patients with schizophrenia by Zahn, Theodore P., Pickar, David

“…High autonomic base levels and low responsivity are frequently observed in unmedicated patients with schizophrenia. We previously reported that patients in the…”
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Frontal lobe lesions and electrodermal activity: effects of significance by Zahn, Theodore P, Grafman, Jordan, Tranel, Daniel

“…Several studies have shown that cortical damage, especially to the right hemisphere and to frontal lobes, may attenuate skin conductance responses selectively…”
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"Multidimensionally impaired disorder": is it a variant of very early-onset schizophrenia? by Kumra, S, Jacobsen, L K, Lenane, M, Zahn, T P, Wiggs, E, Alaghband-Rad, J, Castellanos, F X, Frazier, J A, McKenna, K, Gordon, C T, Smith, A, Hamburger, S, Rapoport, J L

“…To examine the validity of diagnostic criteria for a subgroup of children with atypical psychosis (n = 19), designated here as "multidimensionally impaired."…”
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Parental expressed emotion and psychophysiological reactivity in disturbed and normal children by Hibbs, E D, Zahn, T P, Hamburger, S D, Kruesi, M M, Rapoport, J L

“…Increased spontaneous fluctuations in skin conductance (SC) in adult schizophrenics have been associated with high expressed emotion (EE) in their relatives…”
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Neuroleptic Effects on Autonomic Activity in Schizophrenia: Between-Group and Within-Subject Paradigms and Comparisons With Controls by Zahn, Theodore P., Pickar, David, van Kammen, Daniel P.

“…Effects of fluphenazine on electrodermal activity (EDA) and heart rate (HR) were studied in patients with schizophrenia and normal control subjects during rest…”
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Autonomic activity during task performance in adults with closed head injury by Zahn, Theodore P, Mirsky, Allan F

“…Skin conductance (SC) and heart rate (HR) were recorded in two experiments in persons who had suffered a closed head injury (CHI) at least 2 years previously…”
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Studies of Autonomic Psychophysiology and Attention in Schizophrenia by Zahn, Theodore P.

“…Research from this laboratory over the years has found a rather consistent pattern of high baseline levels of many (but not all) indices of autonomic activity,…”
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Dextroamphetamine: Cognitive and Behavioral Effects in Normal Prepubertal Boys by Rapoport, Judith L., Buchsbaum, Monte S., Zahn, Theodore P., Weingartner, Herbert, Ludlow, Christy, Mikkelsen, Edwin J.

“…The behavioral, cognitive, and electrophysiological effects of a single dose of dextroamphetamine (0.5 milligram per kilogram of body weight) or placebo was…”
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Autonomic nervous system effects of acute doses of caffeine in caffeine users and abstainers by Zahn, T P, Rapoport, J L

“…The effects of caffeine on autonomic nervous system (ANS) activity were tested in 20 adult males who were either high or low consumers of caffeine. Subjects…”
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Psychological correlates of monoamine oxidase activity in normals by Schooler, C, Zahn, T P, Murphy, D L, Buchsbaum, M S

“…This study replicates and extends earlier work by finding that low levels of platelet monoamine oxidase (MAO) activity correlate with sensation seeking, high…”
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On the bimodality of the distribution of electrodermal orienting responses in schizophrenic patients by Zahn, T P

“…Data are presented from four of the author's studies on the electrodermal orienting responss which fail to confirm the findings of Gruzelier and Venables of a…”
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Behavioral and cognitive effects of caffeine in boys and adult males by Rapoport, J L, Jensvold, M, Elkins, R, Buchsbaum, M S, Weingartner, H, Ludlow, C, Zahn, T P, Berg, C J, Neims, A H

“…The behavioral and cognitive effects of single doses of caffeine (3 and 10 mg/kg) were studied using a double blind placebo-controlled crossover design…”
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Manual and Saccadic Reaction Time With Constant and Variable Preparatory Intervals in Schizophrenia by Zahn, Theodore P, Roberts, Bruce R, Schooler, Carmi, Cohen, Rudolf

“…Saccadic reaction time (RT) has been shown to be unimpaired in schizophrenia. Could this be due to its not requiring controlled information processing? The…”
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Attention Deficits in Childhood-Onset Schizophrenia: Reaction Time Studies by Zahn, Theodore P, Jacobsen, Leslie K, Gordon, Charles T, McKenna, Kathleen, Frazier, Jean A, Rapoport, Judith L

“…The hypothesis of continuity between childhood-onset and adult schizophrenia was tested by comparing the performance of 15 patients with childhood-onset…”
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A 2-year prospective follow-up study of children and adolescents with disruptive behavior disorders. Prediction by cerebrospinal fluid 5-hydroxyindoleacetic acid, homovanillic acid, and autonomic measures? by Kruesi, M J, Hibbs, E D, Zahn, T P, Keysor, C S, Hamburger, S D, Bartko, J J, Rapoport, J L

“…A 2-year prospective follow-up study of 100% (N = 29) of a sample of children and adolescents with disruptive behavior disorders found that the baseline lumbar…”
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Autonomic nervous system markers of psychopathology in childhood-onset schizophrenia by Zahn, T P, Jacobsen, L K, Gordon, C T, McKenna, K, Frazier, J A, Rapoport, J L

“…Consistent abnormalities in peripheral indicators of autonomic activity, ie, skin conductance (SC) and heart rate (HR), have been reported in adult-onset…”
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A thoroughly modern gage by Dimitrov, Mariana, Phipps, Michael, Zahn, Theodore P., Grafman, Jordan

“…We describe a 50-year-old male patient (MGS) with a right frontal ventromedial lesion who showed preserved general cognitive, abstract thinking and…”
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Reaction time indices of attention deficits in boys with disruptive behavior disorders by ZAHN, T. P, KRUESI, M. J. P, RAPOPORT, J. L

“…Boys with diagnoses in the disruptive behavior disorder (DBD) spectrum and normal controls were tested in two reaction time (RT) experiments. In Experiment I…”
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Autonomic Nervous System Activity in Autistic, Schizophrenic, and Normal Men: Effects of Stimulus Significance by Zahn, Theodore P, Rumsey, Judith M, Van Kammen, Daniel P

“…Deficits in attention and cognition in autistic children have been attributed to problems in the early stages of stimulus processing and to autonomic…”
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Physiological and psychological effects of progesterone in man by Little, B C, Matta, R J, Zahn, T P

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