Autonomic Effects of Stimulation in SCI

Autonomic Effects of Transcutaneous Spinal Cord Stimulation in Veterans With SCI

This study aims to determine the effects of transcutaneous spinal cord stimulation to increase blood pressure and use that device to increase power output and heart rate recovery during arm cycle ergometry. In addition, the investigators will see if the stimulation helps regulate body temperature when in a cool environment.

This study aims to determine the effects of transcutaneous spinal cord stimulation to increase blood pressure and use that device to increase exercise power output and heart rate recovery during arm cycle ergometry. In addition, the investigators will see if the stimulation helps regulate body temperature when in a cool environment. Study 1 (arm cycle ergometry) will consist of 2 visits that will be between 2-3 hours in duration, separated by no less than 3 days, and will consist of putting the electrode at the optimal spot on the spine and completing a submaximal arm ergometry exercise and the other visit will be a sham visit. Study 2 (cool environment) will consist of 2 visits that will be between 3-4 hours in duration, separated by no less than 3 days, and will consist of assessing core temperature when in a cool environment with the stimulator on and off.

Inclusion Criteria:

• injury more than 1 year ago, non-ambulatory
• level of lesion C3-T6, AIS A, B, or C
• stable prescription medication regimen for at least 30 days
• must be able to commit to study requirements of 7 visits within a 60-day period

Exclusion Criteria:

• extensive history of seizures
• ventilator dependence or patent tracheostomy site
• history of neurologic disorder other than SCI
• history of moderate or severe head trauma
• contraindications to spine stimulation
• significant cardiovascular disease
• active psychological disorder
• recent history (within 3 months) of substance abuse
• open skin lesions over spine at levels targeted for stimulation (L1/L2) and pregnancy