Effects Of Bromazepam Research Articles

The effects of bromazepam over the central and frontal areas during a motor task: an EEG study.

The present study investigates the influence of bromazepam while executing a motor task. Specifically, we intend to analyze the changes in alpha absolute power under two experimental conditions, bromazepam and placebo. We also included analyses of theta and beta frequencies. We collected electroencephalographic data before, during, and after motor task execution. We used a Two Way ANOVA to investigate the condition (PL × Br6 mg) and moment (pre and post) variables for the following electrodes: Fp1, Fp2, F7, F3, Fz, F4, F8, C3, CZ and C4. We found a main effect for condition on the electrodes FP1, F7, F3, Fz, F4, C3 and CZ, for alpha and beta bands. For beta band we also found a main effect for condition on the electrodes Fp2, F8 and C4; for theta band we identified a main effect for condition on C3, Cz and C4 electrodes. This finding suggests that the motor task did not have any influence on the electrocortical activity in alpha, and that the existing modifications were a consequence due merely to the drug use. Despite its anxiolytic and sedative action, bromazepam did not show any significant changes when the individuals executed a finger extension motor task.

Bromazepam Impairs Motor Response: An ERSP Study

This study aimed to investigate the acute modulatory effect of bromazepam, a benzodiazepine derivative drug, on alpha and beta bands (8-35Hz) in primary motor areas (M1) through event-related spectral perturbation (ERSP). Ten healthy subjects were submitted to a cross-over double-blind design. Subjects performed a visuomotor task where they had to identify rapidly the ball launched horizontally and catch it quickly, while electroencephalographic activity was acquired. We found a statistically significant difference on the time windows of 2920 ms for 13Hz in the electrodes C3 and Cz, and on the time window of 2000 ms for 18Hz in the electrodes C3, when compared the bromazepam and placebo conditions. We concluded that the acute effects of bromazepam provoked changes in information process in the left M1 represented by electrode C3 in both 13 Hz and 18 Hz. Our paradigm is relevant for a better understanding of the brain dynamics due to the information related to bromazepam effects on sensorimotor processes. We consider this report an invitation to conduct more studies in order to associate electro-cortical activity and psychometric tests.

The effects of bromazepam over the temporo-parietal areas during the performance of a visuomotor task: A qEEG study

This study investigated the effects of bromazepam on qEEG when 14 healthy subjects were asked to perform a visuomotor task (i.e., motor vehicle driving task). The subjects were exposed to two experimental conditions: the placebo (PL) and 6 mg of bromazepam (Br 6 mg), following a randomized, double-blind design on different days. Specifically, we observe absolute power extracted from qEEG data for theta band. We expected to see a decrease in absolute theta power in the temporal and parietal areas due to the influence of bromazepam for the experimental group when compared with the placebo group. We found a main effect for the condition factor for electrodes T3, T4, P3 and P4. We also observed a main effect for the period factor for electrodes P3 and P4. We observed that the ingestion of 6 mg of bromazepam induces different patterns in theta power at the temporal and parietal sites. We concluded that 6 mg of bromazepam was an important factor in the fluctuation of the activities in the temporal and parietal areas. We then hypothesize about the specific role of this drug during the execution of a visuomotor task and within the sensorimotor integration process.

The influence of bromazepam on cortical power distribution

The EEG has been widely employed in the assessment of electrophysiological changes induced by distinct medications. Its sensibility in detecting alterations produced by a specific substance may be enhanced by methods of quantitative analyses (qEEG). The present study aimed at investigating the modulatory effects of bromazepam on brain dynamics. The effects of bromazepam (3 mg) on EEG power distribution were tested in 10 healthy individuals, in a double-blind experiment. The electrophysiological measure was analyzed across experimental conditions, moments, and electrodes, in the delta, theta, alpha and beta frequency bands separately. A significant decrease of relative power was observed in delta and theta (main effect of condition). No interactions were observed. Although the expected anxiolytic EEG profile was not observed (increased beta and decreased alpha activity), this specific result may be related to other factors such as dosage used and the subjects' general physiological state, and not necessarily to the drug itself.

The effects of bromazepam on the early stage of visual information processing (P100)

The early stages of visual information processing, involving the detection and perception of simple visual stimuli, have been demonstrated to be sensitive to psychotropic agents. The present study investigated the effects of an acute dose of bromazepam (3 mg), compared with placebo, on the P100 component of the visual evoked potential and reaction time. The sample, consisting of 14 healthy subjects (6 male and 8 female), was submitted to a visual discrimination task, which employed the "oddball" paradigm. Results suggest that bromazepam (3 mg) impairs the initial stage of visual information processing, as observed by an increase in P100 latency.

Analysis of the influence of bromazepam on cognitive performance through the visual evoked potential (P300)

Benzodiazepines have been used in the pharmacological treatment of anxiety for over four decades. However, very few studies have combined bromazepam and event-related potentials (ERP). The present study aimed at investigating the modulatory effects of this drug on brain dynamics. Specifically, the effects of bromazepam (3 mg) on the P300 component of the ERP were tested in a double-blind experiment. The sample, consisting of 15 healthy subjects (7 male and 8 female), was submitted to a visual discrimination task, which employed the "oddball" paradigm. Electrophysiological (P300) and behavioral measures (stroop, digit span, and reaction time) were analyzed across three experimental conditions: placebo 1, placebo 2, and bromazepam. Results suggest that the effects of bromazepam (3 mg) on cognitive processes are not apparent. In spite of what seems irrefutable in current literature, bromazepam did not produce evident effects on the behavioral and electrophysiological variables analyzed.

Evaluation of the pathophysiological effects of bromazepam on some clinical chemistry parameters of the rat

The main aim of this study is to evaluate the pathophysiological effects of using high doses (single and repeated) of bromazepam, a broad-spectrum sedative, on blood glutathione (GSH), lipid peroxidation (TBA) and some clinical chemistry parameters of rat. Rats were orally supplemented with a single dose (4.5 mg/kg B.wt) or repeated doses (4.5 mg/kg B.wt for 7 consecutive days) of bromazepam. Another two sets of animals were orally administered with the same volume of the vehicle (distilled water) and considered as control groups. Blood samples were collected at different time points during the first 24 hours after the single dose treatment and for 10 days following the last treatment in case of repetitive dose administration to monitor the changes in the tested parameters. Blood GSH was significantly decreased after administration of the drug, while levels of serum TBA were significantly increased. Serum total protein values were elevated during the whole time course, but this was not significant. Meanwhile, creatinine, urea, uric acid and the activities of alanine amino transferase (ALT) and aspartate amino transferase (AST) were significantly increased as a result of treatment with either dose. We conclude that using high doses of bromazepam significantly alters both liver and kidney functions, and thatGSH might play an important role in the elimination of these side effects. Bromazepam increased lipid peroxidations in rat tissues by a mechanism dependent on glutathione levels during the 24 hr. post-treatment. A clear tendency for a positive correlation between bromazepam concentration and serum lipid peroxidation levels was recorded It is advisable that people who take high doses of this drug, should be aware of these effects, especially those suffering from liver and kidney problems. KEY WORDS: Bromazepam, glutathione, lipid peroxidation, clinical chemistry, rat. Egyptian Journal of Biology Vol.3(2) 2001: 72-80

Dose response effect of bromazepam on psychomotor skills

The acute effects of bromazepam 1.5, 3, 6 and 12 mg on psychomotor skills were examined in 12 male volunteers. The two lower doses slightly improved psychomotor performance, probably due to reduction of tension. The 6 mg and especially the 12 mg dose impaired all the psychomotor factors tested. The impairment was roughly correlated with the increasing plasma levels 30, 90 and 150 min after administration of the drug. Psychomotor performance improved subsequently even if the plasma levels remained high.