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The purpose of this study is to determine if the enhancement of electroencephalographic (EEG) slow-wave activity using transcranial electrical stimulation (TES) at Slow Oscillation (SO) frequency, during a restricted period of nocturnal sleep, enhances the restorative properties of that period of sleep and improves performance during a subsequent period of sleep deprivation.
The goal of this clinical trial is to learn about the effects of transcranial electric stimulation on attentional control and brain dynamics in healthy adults. The main questions are: Does stimulation affect how subjects exert attentional control? Do mathematical models predict brain activity changes in response to stimulation? Participants will have electroencephalography (EEG) brain data recorded while: They sit relaxed They receive stimulation, while relaxed They receive stimulation while completing computerized tasks to measure cognitive abilities ("cognitive tasks") They receive sham (ineffective) stimulation during cognitive tasks
Postoperative pain after major surgery for obstructive sleep apnea (OSA), such as palatopharyngoplasty (PPP) and maxillomandibular advancement (MMA) is moderate-to-severe, and may persist for weeks. Control of this pain may be difficult, because OSA patients are very sensitive to traditional opioid pain medications, and their side effects. Poorly controlled pain slows down patients' recovery after surgery, including a return to normal daily activities and work, and may also delay wound healing. This study will investigate whether pain relief and recovery after surgery may be improved with the application of a weak electrical current to the skin of the patient's head (transcranial electrostimulation, TES). The TES works by blocking pain in the central nervous system through multiple mechanisms, which result in non-pharmacological pain relief, without drug-associated side effects.
The goal of this clinical trial is to learn about the ability of non-invasive brain stimulation during sleep to enhance people's deep sleep and its potential benefit on memory in people with mild cognitive impairment via home use sleep therapy device (SleepWISP) as well as learn about biomarkers associated with Alzheimer disease (AD). The clinical trial aims to answer the following main questions: 1. Whether the non-invasive transcranial electrical stimulation (TES) delivered by SleepWISP could provide short-term enhancement of deep sleep in a single night in the target population. 2. Whether TES delivered by SleepWISP could enhance deep sleep over multiple nights in the target population. 3. Whether enhance on deep sleep could improve memory performance in the target population. Participants will be asked to wear non-invasive and painless devices that record their brain activity during sleep along with an actigraphy watch that measures their movement throughout the day. In addition, blood samples or nasal swab assays will be collected from participants multiple times during the study.
The two goals of the proposed study are: (1) To determine how brain activity changes with cognitive recovery over time from acute to chronic phases of traumatic brain injury (TBI). (2) To determine how the time of anodal transcranial electrical stimulation (A-tES) administration affects cognitive performance and brain activity in TBI. To achieve these study goals, the investigators will conduct a pilot clinical trial over three years in which the investigators aim to recruit 60 patients with moderate to severe TBI at the University of Cincinnati Medical Center (UCMC). During the acute phase of TBI, all participants will complete clinical questionnaires and perform 2 cognitive computer tasks while their brain activity is recorded. Half of the participants will be randomly selected to receive A-tES for 15 minutes while performing cognitive tasks and the other half will receive sham stimulation. All participants will be followed for 6 months. During their 3-month follow-up, the investigators will perform another session where all participants complete the questionnaires and receive A-tES while performing cognitive tasks during brain recording. In their last visit at 6 months post-injury, all participants will complete the questionnaires and cognitive tasks with brain recording but no stimulation treatment. From the collected data, the investigators will determine if time from brain injury correlates with brain activity during performance of cognitive tasks. The investigators will also assess the efficacy of early A-tES treatment for improving cognitive task performance and clinical test ratings at 6 months post-injury in comparison to A-tES delivered during the 3-month follow-up visit.
Working memory (WM) is the ability to hold relevant information in mind in the absence of sensory input. The capacity for WM is a foundation for cognitive control and higher cognitive function more broadly. Previous research demonstrated that during the delay period of WM tasks, oscillatory electrical activity in the prefrontal cortex in the theta-frequency band (4-8 Hz) increased in amplitude. However, other groups found that the slope of the aperiodic signal in the brain was positively correlated with individual differences in WM capacity. Since low-frequency power and a steeper slope of the aperiodic signal are confounded in many analyses, it is not clear whether the slope of the aperiodic signal or the amplitude of low-frequency oscillations underlie WM capacity. With many studies investigating the causal role of theta oscillations in WM, the purpose of this project is to investigate the role of the aperiodic signal in WM performance.
Walking is a complex and continuous task that entails repetitive motions of the body. Relatively high gait variability sensitively predicts falls and cognitive decline in older adults. Previous work has identified an unique brain network relationship linked to gait variability and its relevant cognitive function (i.e., sustained attention). This project aims to develop a non-invasive brain stimulation montage designed to modulate the shared brain networks dynamics and to demonstrate its effects on resting state functional connectivity, gait and cognitive performance in older adults at risk for falls.
The goal of this small (n=75) proof-of-concept randomized clinical trial is to test the effects of transcranial alternating current stimulation (tACS) during motivational interviewing (MI) sessions with participants who drink at above the low-risk level. Participants will be randomized to receive either MI with active stimulation, MI with sham stimulation, or a delayed treatment group that receives MI with no stimulation. Measures will include brain imaging, alcohol use, cannabis use, risk-taking behavior, emotions, and others. Participants who are randomized to the delayed-treatment group will not receive brain imaging.