Post Traumatic Stress Disorder Clinical Trial
Official title:
Assessing the Clinical Utility of tACS in the Treatment of Anxious Arousal and Sensory Sensitivity
Verified date | October 2017 |
Source | Florida State University |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Interventional |
The present study seeks to evaluate the clinical utility of repeated transcranial alternating current stimulation (tACS) by assessing long-term, lasting changes in oscillatory activity and subsequent changes in related behavioral processes of anxious arousal and sensory sensitivity. To date, only transient effects of tACS have been reported, lasting no longer than 30 to 70 minutes. In order to be truly impactful within a clinical setting, however, evidence for long-term effects of tACS is needed.
Status | Completed |
Enrollment | 38 |
Est. completion date | March 31, 2017 |
Est. primary completion date | March 31, 2017 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | All |
Age group | 18 Years to 60 Years |
Eligibility |
Inclusion Criteria: - Right-handed Exclusion Criteria: - History of severe neurological disorder or traumatic brain injury - Psychotropic medication use - Metal plates/implants in head - Pregnancy - Implanted medical devices (e.x. pacemaker) |
Country | Name | City | State |
---|---|---|---|
n/a |
Lead Sponsor | Collaborator |
---|---|
Florida State University |
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Immediate and lasting changes in alpha oscillatory power and directed, long-range cortico-cortical connectivity. | Occipitoparietal alpha power and long-range, directed oscillatory connectivity within the alpha frequency will be assessed from 2 minutes of eyes-open, resting-state electroencephalogram (EEG) activity. Oscillatory power will be estimated using the multitaper spectral estimation technique, averaging over the alpha frequency bin of 8-12 Hz. Directed connectivity will be assessed using spectral Granger causality within the 8-12 Hz range. Specifically, long-range, posterior-frontal connectivity with be assessed. | Immediately before, immediately after, and 30 minutes after stimulation on the first day. Immediately before (24 hours after most recent stimulation), immediately after, and 30 minutes after stimulation on the final (fourth) day. | |
Secondary | Immediate and lasting reductions in anxious arousal | Self-report ratings of subjective units of anxious arousal are acquired using a visual analog scale, ranging from 0 (not at all anxiously aroused) to 100 (extremely anxiously aroused). | Immediately before, immediately after, 30 minutes after stimulation on the first and final day. Immediately before (24 hours after most recent stimulation) and immediately after stimulation on the second and third days. | |
Secondary | Immediate and lasting changes in affective perception of sensory stimuli | Pleasantness ratings of neutral and negative olfactory and auditory stimuli are acquired on a visual analog scale, ranging from 0 (extremely unpleasant) to 100 (extremely pleasant). Auditory stimuli consist of a simple tone (neutral) and scream (negative) at three different intensities (quiet, medium, and loud), each presented once for 2 seconds through headphones. Olfactory stimuli consist of a neutral odor (acetophenone) and negative odor (burning rubber), diluted in mineral oil for three different intensities (weak, medium, strong). Approximately 3 mL of each odor are presented in 30 mL amber bottles, upon which participants are asked to take one steady sniff. | Immediately before, immediately after, and 30 minutes after stimulation on the first day. Immediately before (24 hours after most recent stimulation), immediately after, and 30 minutes after stimulation on the final (fourth) day. |
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