Asymmetric single electrode cuff for generation of unidirectionally propagating action potentials for collision blocking
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United States of America Patent
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-
Mar 17, 1987
Grant Date -
N/A
app pub date -
Oct 11, 1984
filing date -
Oct 11, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A single electrode, asymmetric electrode cuff (B) is disposed around a nerve trunk (A). A signal generator (C) is connected between a cathode (20) disposed asymmetrically in the electrode cuff and an anode (22) disposed in an electrically conductive relationship within the body tissue. The signal generator applies a stimulus signal (FIG. 3) which generates unidirectionally propagating action potentials on the nerve trunk. The electrode cuff includes a dielectric sleeve (10) in which the cathode is positioned a first distance (L1) from an escape end (14) and a second distance (L2) from an arrest end (16). The first distance is at least 1.7, and preferably about 7, times the second distance. This asymmetry causes a primary or forward stimulus signal current (30) to be correspondingly greater than a secondary or reverse current (32).
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