Abstract:
:Despite being the most widely consumed psychoactive substance in the world, there is considerable confusion regarding the effects of caffeine. This study examined objective indices of performance, and self-reported mood, headache, and sleep in 36 healthy male and female habitual caffeine consumers exposed to a pattern of moderate intake. A double-blind placebo-controlled cross-over design with counterbalancing was employed in which all subjects participated in four experimental conditions involving the ingestion of placebo or caffeine 3 times daily for 6 days followed by a 7th (challenge) day of placebo or caffeine ingestion. No evidence was found that caffeine improved performance, either in the context of acute or habitual use. On the contrary, performance was found to be significantly impaired when caffeine was withdrawn abruptly following habitual use. Participants reported feeling more alert and less tired following acute ingestion of caffeine, but feeling less alert in conjunction with chronic exposure to the drug. In addition, caffeine withdrawal was associated with reported increases in frequency and severity of headache, and with reports of sleeping longer and more soundly.
journal_name
Neuropsychobiologyjournal_title
Neuropsychobiologyauthors
James JEdoi
10.1159/000026514subject
Has Abstractpub_date
1998-01-01 00:00:00pages
32-41issue
1eissn
0302-282Xissn
1423-0224pii
nps38032journal_volume
38pub_type
临床试验,杂志文章abstract::Alcohol-dependent patients face a substantial risk of relapse after detoxification. Though psychosocial stress and coping strategies are regarded as major contributing factors in returning to drinking, the direct effects of coping styles on relapse are not clear. In this treatment outcome study, a mixed gender sample ...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000096991
更新日期:2006-01-01 00:00:00
abstract:BACKGROUND:Panic disorder (PD) is a common and often chronic psychiatric condition that can lead to considerable disability in daily life. Using [(18)F]fluorodeoxyglucose-PET, we examined brain baseline glucose metabolism in PD patients in comparison with normal controls and the changes in glucose metabolism after 12 w...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000337740
更新日期:2012-01-01 00:00:00
abstract::Changes of field potentials electrically evoked from the mesencephalon were studied in two dopaminergic target areas. The modulation of the responses in prefrontal cortex and striatum induced by intravenous injection of various compounds influencing central dopaminergic transmission is followed. In general, drugs with...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000118200
更新日期:1985-01-01 00:00:00
abstract::We agree with the conclusions of a recent article in this journal [James, Neuropsychobiology 1994;30:124-125] that studies on the psychoactive effects of caffeine need to take into account the possibility that the results obtained might represent merely the reversal of deleterious effects of caffeine deprivation rathe...
journal_title:Neuropsychobiology
pub_type: 杂志文章,评审
doi:10.1159/000119192
更新日期:1995-01-01 00:00:00
abstract::REM sleep behavior disorder (RBD) is so far a possibly underestimated yet well-described sleep disorder. Its major impact is the vigorous sleep behavior that often results in injuries to the patient himself or to people sleeping nearby. We treated a 64-year-old male with a clinically and polysomnographically confirmed...
journal_title:Neuropsychobiology
pub_type: 临床试验,杂志文章
doi:10.1159/000119383
更新日期:1997-01-01 00:00:00
abstract::A 56-year-old male parkinsonian patient developed a unique behavioral change following the oral administration of cinepazide, a cerebral vasodilator. This behavior consisted of an apparent infatuation with a ward nurse, which ceased after medication was discontinued. ...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000118040
更新日期:1984-01-01 00:00:00
abstract:OBJECTIVE:We examined striatal dopamine transporter (DAT) binding in bipolar and unipolar depressed patients and compared these values to those obtained from healthy control subjects using the selective DAT radioligand [(99m)Tc]TRODAT-1 and single photon emission computed tomography imaging. We hypothesized that DAT le...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000106476
更新日期:2007-01-01 00:00:00
abstract::Both thyrotropin-releasing hormone (TRH) and amphetamine antagonize pentobarbital. They are more effective in the day than at night. This is true for TRH even when the dose of pentobarbital is increased at night to prolong sedation. Under this condition the day-night difference is lost for amphetamine. Both substances...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000117484
更新日期:1975-01-01 00:00:00
abstract:BACKGROUND:Abnormalities in different parameters of the norepinephrine system have been widely described in major depression. The presence of alpha(2)-adrenoreceptors in blood platelets, similar to those in the brain, prompted us to evaluate them in depressed patients, as compared with healthy controls. METHODS:Fiftee...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000054930
更新日期:2001-01-01 00:00:00
abstract::Analysis of the mechanisms underlying the clinical effects of different drugs is a vital part of psychopharmacology. It is fair to say, however, that such analyses have thus far met with little success. This lack of success can be traced to a variety of sources that have flawed the analytical process itself. Detailed ...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000118131
更新日期:1984-01-01 00:00:00
abstract:BACKGROUND:Self-immolation (SI) is considered one of the most painful, dramatic, and at the same time most inexplicable methods of suicide, with a high social impact. Prevalence rates are particularly high in Iran, and in north-western Iran specifically. Here, we report sociodemographic, psychological, and psychiatric ...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000487859
更新日期:2017-01-01 00:00:00
abstract::Quantitative assessment of regional cerebral blood flow (rCBF) was performed in a 22-year-old man with intractable temporal lobe epilepsy on long-term high-dose phenytoin (PHT) therapy, using single photon emission computed tomography (SPECT) with N-isopropyl-(iodine-123)-p-iodoamphetamine. In all the SPECT scans repe...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000118982
更新日期:1993-01-01 00:00:00
abstract:OBJECTIVE:There is some evidence that repetitive transcranial magnetic stimulation (rTMS) is an effective method of treating patients suffering from obsessive-compulsive disorder (OCD). Here, we tested the hypothesis that rTMS has a positive impact both on symptom severity and cognitive performance in such patients. Sp...
journal_title:Neuropsychobiology
pub_type: 杂志文章,随机对照试验
doi:10.1159/000446287
更新日期:2016-01-01 00:00:00
abstract::In 60 patients, hospitalized for a depressive syndrome, visual average evoked potentials (V .AEP) to stimuli of different intensities and the occurrence of life-events during the last year, as assessed by means of a specially constructed questionnaire, were investigated. Patients with an augmenter response in V .AEP, ...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000117773
更新日期:1980-01-01 00:00:00
abstract::The medical histories of 600 psychotic and 369 nonpsychotic subjects were examined for the occurrence of rheumatic chorea. There was significantly more rheumatic chorea in the histories of psychotic patients than in nonpsychotics (p less than 0.01, chi-square). Neuropathological associations are discussed. ...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000118234
更新日期:1986-01-01 00:00:00
abstract:BACKGROUND:Testosterone has been postulated as a 'social' hormone, but the relationship between testosterone and personality traits linked with socially oriented behaviors such as extraversion remains unclear. The objective of our study was to investigate the association between baseline salivary testosterone levels an...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000369024
更新日期:2015-01-01 00:00:00
abstract::The possible involvement of anxiety and learning/memory processes in escape-directed (struggling) behavior in a two-trial swimming test was investigated in mice, as well as the differential effects that low doses of flumazenil (a benzodiazepine receptor antagonist) could display depending on the animals' anxiety level...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000119058
更新日期:1994-01-01 00:00:00
abstract:BACKGROUND/AIMS:Valproic acid or valproate (VA) is an anticonvulsant and mood-stabilizing drug primarily used in the treatment of epilepsy and bipolar disorder. Ziprasidone (ZPN) is an atypical antipsychotic drug used mainly for the treatment of schizophrenia. METHODS:This study is a part of our investigation on the c...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000327604
更新日期:2011-01-01 00:00:00
abstract::The present paper is a review of the use of psychophysiology in diagnosis and treatment of simple phobias. The paper begins with a definition and characterization of phobic fears, together with a description of prevalence rates, age onset, and gender differences. Acquisition is then discussed within a Three-Systems mo...
journal_title:Neuropsychobiology
pub_type: 杂志文章,评审
doi:10.1159/000118499
更新日期:1988-01-01 00:00:00
abstract::To evaluate the effect of the odor of incense on brain activity, electroencephalograms (EEGs) and event-related potentials (ERPs) in a push/wait paradigm were recorded in 10 healthy adults (aged 23-39 years) with normal olfactory function. EEG was recorded from 21 electrodes on the scalp, according to the Internationa...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000209859
更新日期:2009-01-01 00:00:00
abstract:BACKGROUND/AIMS:Suicidal behavior (SB) in bipolar disorder (BD) is a complex multifactorial event resulting from an interaction of genetic, neurobiological and psychosocial factors. Recent studies identified new possible mechanisms, suggesting a role for sirtuins (SIRTs 1-7), a family of nicotinamide adenine dinucleoti...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000446921
更新日期:2016-01-01 00:00:00
abstract::Growth hormone (GH) possesses multiple metabolic effects, in particular with regard to glucose and lipid homeostasis. Studies on the effects of GH on body weight and food and water intake are scarce and have yielded controversial results. We investigated the effects of different modes of GH administration on the param...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000048671
更新日期:2002-01-01 00:00:00
abstract::Carnitine is essential for mitochondrial energy production. Disturbance in mitochondrial function may contribute to or cause the fatigue seen in chronic fatigue syndrome (CFS) patients. One previous investigation has reported decreased acylcarnitine levels in 38 CFS patients. We investigated 35 CFS patients (27 female...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000119226
更新日期:1995-01-01 00:00:00
abstract:BACKGROUND:Schizophrenia is a genetically complex disorder with an unknown pathophysiology. Several genes implicated in glutamate metabolism have been associated with the disorder. Recent studies of polymorphisms in the dystrobrevin-binding protein 1 gene (DTNBP1; dysbindin) and D-amino-acid-oxidase (DAO) gene, both in...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000235799
更新日期:2009-01-01 00:00:00
abstract::1,927 outpatients were included by 392 general practitioners in an open study in order to evaluate the safety of tianeptine in the ambulatory treatment of depression. The results of 1,858 depressed patients without melancholia and psychotic features, fulfilling DSM III criteria of Major Depressive Episode or Dysthymic...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000118824
更新日期:1992-01-01 00:00:00
abstract::The somnopolygraphs of 26 sober chronic alcoholics were compared with those of an age-matched control group, after approximately 25 days of sobriety. The sleep efficiency index and latency to sleep onset were significantly disturbed in alcoholic subjects. There was a decrease in the number of REM episodes. Slow-wave s...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000118169
更新日期:1985-01-01 00:00:00
abstract::The effects of the dopaminergic agonists (L-dopa, pergolide) and antagonists (haloperidol, clozapin) and a cholinergic agonist (tacrine) and antagonist (mecamylamine) on the voluntary intake of nicotine were investigated with the 2-bottle paradigm with the test drugs being dissolved directly in the drinking fluid of t...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000026661
更新日期:2000-01-01 00:00:00
abstract::Serum dopamine-beta-hydroxylase (DBH) levels were assessed in 150 depressed patients of both sexes, with a mean age of 44.0 +/- 12.3 (SD) years. Patients were divided into unipolars (n = 46), bipolars (n = 25), neurotic-reactive (n = 46) and unspecified (n = 38) i.e., those who did not fit into any of the previous cat...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000117963
更新日期:1983-01-01 00:00:00
abstract::Three anxiolytic drugs (bromazepam 3 mg, buspirone 10 mg, and clobazam 10 mg p.o.) were evaluated for their effects on memory, psychomotor performance and subjective response in a double-blind, placebo-controlled, crossover study in 20 healthy volunteers. At each session, measurements were made before and 2 and 6 h af...
journal_title:Neuropsychobiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1159/000118609
更新日期:1989-01-01 00:00:00
abstract:BACKGROUND:Executive functions (EF) are often impaired in autism spectrum disorder (ASD). Such dysfunctions are associated with anxiety, depression, and a lack of autonomy. Transcranial direct current stimulation (tDCS) has been shown to enhance EF in healthy adults and clinical populations and to improve working memor...
journal_title:Neuropsychobiology
pub_type: 杂志文章
doi:10.1159/000501025
更新日期:2019-01-01 00:00:00