The purpose of this study is to explore whether 4 weeks of at-home transcutaneous auricular neurostimulation (tAN) can reduce chronic pain after a stroke. Investigators will recruit up to 24 participants with chronic post-stroke upper extremity pain. The goal is to determine if there is a pain reduction after ear stimulation.
In this study, the investigators main goal is to establish transcutaneous auricular neurostimulation (tAN) as an effective non-invasive neuromodulation method for pain management of post-stroke pain (PSP) and to investigate the brain circuit changes between pre- and post-treatment in individuals with PSP using brain imaging techniques. Aim 1. Assess the feasibility and efficacy of self-administered, at-home tAN for pain management in stroke survivors with chronic pain compared to sham. Aim 2. Investigate pain-induced brain activity changes over a one-month tAN treatment to understand the analgesic mechanisms of tAN. Aim 3. Explore renormalization of brain functional connectivity and dynamic brain state throughout tAN treatment and develop brain imaging biomarkers to track and predict treatment efficacy for chronic post-stroke pain.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
24
Transcutaneous Auricular Neurostimulation (tAN) is a wearable, electrical stimulation device that delivers electricity to specific parts of the human ear.
30 Bee Street
Charleston, South Carolina, United States
RECRUITINGMedical University of South Carolia
Charleston, South Carolina, United States
NOT_YET_RECRUITINGSensory Threshold
We will determine the pain threshold with a 30 × 30 mm thermode attached to the non-affected forearm of participants (TSA2 thermode; Medoc, Durham, NC, USA). Using the TSA2, we will determine heat sensitivity beginning at 32°C and increasing by 0.5°C per second. Participants will be asked to press a button (to record temperatures) when the stimulus is first detected (sensory threshold). We will acquire QST data at baseline, after one session (30 minutes) of tAN, after 2 weeks of tAN, and after 4 weeks of tAN.
Time frame: 4 weeks
Pain Threshold
We will determine the pain threshold with a 30 × 30 mm thermode attached to the non-affected forearm of participants (TSA2 thermode; Medoc, Durham, NC, USA). Using the TSA2, we will determine heat sensitivity beginning at 32°C and increasing by 0.5°C per second. Participants will be asked to press a button (to record temperatures) when the stimulus becomes painful (pain threshold). We will acquire QST data at baseline, after one session (30 minutes) of tAN, after 2 weeks of tAN, and after 4 weeks of tAN.
Time frame: 4 weeks
Pain tolerance
We will determine the pain threshold with a 30 × 30 mm thermode attached to the non-affected forearm of participants (TSA2 thermode; Medoc, Durham, NC, USA). Using the TSA2, we will determine heat sensitivity beginning at 32°C and increasing by 0.5°C per second. Participants will be asked to press a button (to record temperatures) when the stimulus is intolerable (pain tolerance). We will acquire QST data at baseline, after one session (30 minutes) of tAN, after 2 weeks of tAN, and after 4 weeks of tAN.
Time frame: 4 weeks
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