PURPOSE: We reviewed studies from 1999 to 2009 on anxiolytic effects of different essential oils toward rodents in anxiety-related behavioral models. METHOD: Journal papers that evaluated the anxiolytic effects of essential oils for rodents were extracted from available electronic data bases. RESULTS: The results based on 14 studies showed that different rodent species were recruited including ICR mice and Swiss mice. Most of studies applied the Elevated Plus Maze (EPM) as the animal behavioral model. Lavender oil was the most popular within the 14 studies. Lavender and rose oils were found to be effective in some of the studies. Only one study reported the underlying neurophysiological mechanism in terms of concentrations of emotionally related neuro-transmitters such as dopamine, serotonin, and their derivatives, in various brain regions. CONCLUSION: Some essential oils are found to be effective to induce anxiolytic effect in rodents under different animal anxiety models. However, more standardized experimental procedures and outcome measures are needed in future studies. Translational research to human subjects is also recommended.

BACKGROUND:The homeopathic preparation of Pulsatilla nigricans is used in the treatment of anxiety related disorders. Though in clinical use for many years, the anxiolytic activity of Pulsatilla nigricans (Puls) has not been evaluated experimentally. Hence the present study was conducted in Swiss albino mice to evaluate the anxiolytic activity of Puls and compare its activity with the standard anxiolytic drug, diazepam.

METHODS:Twenty four mice were divided into 4 groups of 6 animals each, control, standard and two test groups. The control group was treated Ethyl alcohol 10ml/kg. The standard group received Diazepam, 1mg/kg. Puls 3x and 6x solutions were given at the dose of 10ml/kg to the test groups. All animals were given the test and control treatments orally for 15 days. The anxiolytic effect was tested on days 1, 8 and 15 using the Elevated Plus Maze (EPM) and Open Field Test (OFT).

RESULTS:Both diazepam and Puls showed significant anxiolytic activity in EPM and OFT test compared to control. The total number of entries and time spent in open arm in EPM was increased by both diazepam and Puls, the effect of 3x dilution of Puls was greater than diazepam. In the OFT the number of squares crossed, rearing and assisted rearings decreased with both diazepam and Puls compared to control and the anxiolytic effect of diazepam was greater than Puls. The anxiolytic effect is greater for the 3x dilution than 6x dilution of Puls.

CONCLUSION:The study showed an anxiolytic effect of homeopathic preparation of Pulsatilla nigricans comparable to that found with a standard drug.

BACKGROUND:Studies on alternative medicines for generalized anxiety disorder (GAD) are few. Manasamitra Vataka (an Ayurveda preparation) is explored for its efficacy in patients with GAD with comorbid generalized social phobia.

MATERIALS AND METHODS:Seventy-two (72) patients with GAD with comorbid social phobia meeting DSM IV TR criteria, and who were between the ages of 20 and 55 of either sex, participated in the study. They were randomly divided into three treatment groups: Group 1 (n=24) and Group II (n=24) received Manasamitra Vataka tablets (100 mg twice daily for 30 days). Group II, in addition to Manasamitra Vataka, underwent Shirodhara (therapy involving dripping of medicated oil [Brahmi tail] over the forehead) treatment for the first 7 days. Group III (n=24) received clonazepam 0.75 mg daily in divided dose for 30 days. The assessment of the study was done using the Hamilton Anxiety Rating Scale, Beck Anxiety Inventory, Beck Depression Inventory, Epworth Sleepiness Scale (ESS), World Health Organization Quality of Life BREF, and Clinical Global Impression scales (Improvement and Efficacy).

RESULTS:Patients from all the groups showed significant reduction in clinical parameters evaluated. However, improvement in ESS was observed only in Group II. The treatment outcome was comparable between the three groups.

CONCLUSIONS:This is the first study conducted on the efficacy of Manasamitra Vataka in anxiety disorders. The results suggest that Manasamitra Vataka is effective in the management GAD with comorbid generalized social phobia. Add-on effect of Shirodhara reduced the daytime sleepiness. Further studies on Manasamitra Vataka need to be carried out to judge its potential as a first-line treatment modality.

The implementation of yogic practices has proven benefits in both organic and psychological diseases. Forty-five women with anxiety selected by a random sampling method were divided into three groups. Experimental group I was subjected to asanas, relaxation and pranayama while Experimental group II was subjected to an integrated yoga module. The control group did not receive any intervention. Anxiety was measured by Taylor's Manifest Anxiety Scale before and after treatment. Frustration was measured through Reaction to Frustration Scale. All data were spread in an Excel sheet to be analysed with SPSS 16 software using analysis of covariance (ANCOVA). Selected yoga and asanas decreased anxiety and frustration scores but treatment with an integrated yoga module resulted in significant reduction of anxiety and frustration. To conclude, the practice of asanas and yoga decreased anxiety in women, and yoga as an integrated module significantly improved anxiety scores in young women with proven anxiety without any ill effects.

OBJECTIVES:The objective of this study was to evaluate the potential anxiolytic effect of sweet orange (Citrus sinensis) aroma in healthy volunteers submitted to an anxiogenic situation.

DESIGN:Forty (40) male volunteers were allocated to five different groups for the inhalation of sweet orange essential oil (test aroma: 2.5, 5, or 10 drops), tea tree essential oil (control aroma: 2.5 drops), or water (nonaromatic control: 2.5 drops). Immediately after inhalation, each volunteer was submitted to a model of anxiety, the video-monitored version of the Stroop Color-Word Test (SCWT).

OUTCOME MEASURES:Psychologic parameters (state-anxiety, subjective tension, tranquilization, and sedation) and physiologic parameters (heart rate and gastrocnemius electromyogram) were evaluated before the inhalation period and before, during, and after the SCWT.

RESULTS:Unlike the control groups, the individuals exposed to the test aroma (2.5 and 10 drops) presented a lack of significant alterations (p>0.05) in state-anxiety, subjective tension and tranquillity levels throughout the anxiogenic situation, revealing an anxiolytic activity of sweet orange essential oil. Physiologic alterations along the test were not prevented in any treatment group, as has previously been observed for diazepam.

CONCLUSIONS:Although more studies are needed to find out the clinical relevance of aromatherapy for anxiety disorders, the present results indicate an acute anxiolytic activity of sweet orange aroma, giving some scientific support to its use as a tranquilizer by aromatherapists.

INTRODUCTION:Patients undergoing endodontic therapy often have severe perioperative and intraoperative anxiety, which may lead to increased perceptions of pain and vital sign instability throughout treatment. The purpose of this study was to test the influences of music, as a nonpharmacologic adjuvant, in terms of significant changes for systolic blood pressure (SBP), diastolic blood pressure (DBP) and heart rate (HR) before, during, and after endodontic treatment in a population with different levels of anxiety assessed with the Corah Dental Anxiety Scale.

METHODS:A total of 100 patients were recruited in the present study; before starting the endodontic treatment, the interviewer administered the Corah Dental Anxiety Scale to the participants to assess the baseline level of anxiety. Patients were randomly divided into 2 groups: the first one listened to the music and the second one did not. Before, during, and after the endodontic procedures, the vital signs (diastolic and systolic blood pressure and heart rate) were recorded. Results were collected and statistically analyzed.

RESULTS:Direct contrasts between patients listening or not listening to music showed that all the measured vital signs decreased considering the overall period (during and after the canal therapy) in the group of patients listening to music (P < .05).

CONCLUSIONS:This study shows the effects of music therapy on vital values and on subjective perception of anxiety during endodontic therapy. Music and medicine always work together; the soothing effects of sounds and musical frequencies make this union an extraordinary tool of synergistic care. Music therapy is a valid nonpharmacologic adjuvant to anxiety perception in endodontic therapies.

OBJECTIVE:This study explored test anxiety benefits of wholistic hybrid derived from eye movement desensitization and reprocessing and Emotional Freedom Techniques (WHEE), Emotional Freedom Techniques (EFTs), and cognitive behavioral therapy (CBT).

PARTICIPANTS:Canadian university students with severe or moderate test anxiety participated.

METHODS:A controlled trial of WHEE (n = 5), EFT (n = 5), and CBT (n = 5) was conducted. Standardized anxiety measures included the Test Anxiety Inventory and Hopkins Symptom Checklist-21.

RESULTS:Despite small sample size, significant reductions in test anxiety were found for all three treatments. In only two sessions, WHEE and EFT achieved the same benefits as CBT did in five sessions. Participants reported high satisfaction with all treatments. Emotional freedom techniques and WHEE participants successfully transferred their self-treatment skills to other stressful areas of their lives.

CONCLUSIONS:Both WHEE and EFT show promise as feasible treatments for test anxiety.

This study examined the changes in cortisol levels and psychological distress symptoms of 83 nonclinical subjects receiving a single hour long intervention. Subjects were randomly assigned to either an emotional freedom technique (EFT) group, a psychotherapy group receiving a supportive interviews (SI), or a no treatment (NT) group. Salivary cortisol assays were performed immediately before and 30 minutes after the intervention. Psychological distress symptoms were assessed using the symptom assessment-45. The EFT group showed statistically significant improvements in anxiety (-58.34%, p<0.05), depression (-49.33%, p<0.002), the overall severity of symptoms (-50.5%, p<0.001), and symptom breadth (-41.93%, p<0.001). The EFT group experienced a significant decrease in cortisol level (-24.39%; SE, 2.62) compared with the decrease observed in the SI (-14.25%; SE, 2.61) and NT (-14.44%; SE, 2.67) groups (p<0.03). The decrease in cortisol levels in the EFT group mirrored the observed improvement in psychological distress.

OBJECTIVE:Investigate the effects of lavender oil on the central nervous system, autonomic nervous system, and mood responses in humans after inhalation.

MATERIAL AND METHOD:Twenty healthy volunteers participated in the experiments. The present study assessed autonomic parameters such as blood pressure, heart rate, respiratory rate, and skin temperature to determine the arousal level of the autonomic nervous system. In addition, subjects were asked to estimate their mood responses such as feeling pleasant or unpleasant, uncomfortable, sensuality, relaxation, or refreshing in order to assess subjective behavioral arousal. Finally, electroencephalogram (EEG) was recorded from 31 electrodes on the scalp according to the international 10 to 20 system, and EEG power spectra were calculated by Fast Fourier Transform (FFT). Data was analyzed by comparing the effects of lavender oil on physiological and mood states with sweet almond oil. These assessments were measured before and after using paired t-test statistical procedure.

RESULTS:The results revealed that lavender oil caused significant decreases of blood pressure, heart rate, and skin temperature, which indicated a decrease of autonomic arousal. In terms of mood responses, the subjects in the lavender oil group categorized themselves as more active, fresher relaxed than subjects just inhaling base oil. Compared with base oil, lavender oil increased the power of theta (4-8 Hz) and alpha (8-13 Hz) brain activities. The topographic map showed obviously more scattering power in alpha range waves particularly in bilateral temporal and central area.

CONCLUSION:The findings provided evidence the relaxing effect of inhaling lavender oil.