SYSTEMS AND METHODS FOR REVERSIBLY BLOCKING NERVE ACTIVITY

摘要

A system and method for blocking nerve impulses using an implanted electrode located on or around a nerve. A specific waveform (34) is used that causes the nerve membrane to become incapable of transmitting an action potential. The waveform has a first phase (36) that produces subthreshold depolarization of the nerve membrane, and a second phase (38) having a shorter duration. The membrane is only affected underneath the electrode, and the effect is immediately and completely reversible. The waveform has a low amplitude and can be charge balanced, with a high likelihood of being safe to the nerve for chronic condition. It is possible to selectively block larger (motor) nerve fibers within a mixed nerve, while allowing sensory information to travel through unaffected nerve fibers.