University of Oklahoma
This study will evaluate the effects of a form of non-invasive brain stimulation on brain functioning and memory in participants with post-stroke cognitive impairment (PSCI).
The goal of this study is to learn important information about the effects of electrical stimulation (Transcranial direct current stimulation (tDCS) on brain functioning in those with post-stroke cognitive impairment (PSCI). The findings will help determine how stimulation affects the brain's activity, cerebral blood flow, and circulating blood biomarkers of neuroinflammation after stroke. The study will use different forms of non-invasive brain imaging to see whether stimulation changes how the brain responds during a memory task. Functional near-infrared spectroscopy (fNIRS) and electroencep…
Inclusion Criteria: 1\) ischemic stroke participants in sub-acute phase (at least 10 days after stroke event or discharge and under 5 months post-event) with cognitive dysfunction (MoCA \<26); Exclusion Criteria: 1. clinically significant or unstable medical or psychiatric condition; 2. diagnosis of severe depression; 3. history of relevant neurological diagnosis (e.g., epilepsy); 4. previous neurosurgical procedure with craniectomy; 5. contraindications to tDCS (implanted brain medical devices); 6. severe visual impairment, hearing impairment, aphasia, neglect or dementia.
tDCS will deliver direct current through rubber electrodes in saline-soaked sponges. Device sends a low-level current from the positive electrode, the anode, to the negative electrode, the cathode. Direct current will be transferred by a saline-soaked pair of surface sponge electrodes (35cm2) and delivered by a specially developed, battery-driven, constant current stimulator with a maximum output of 10mA. The anode will be placed over the LDLPFC and the cathode over the contralateral supra-orbital area.
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