Fig. 4.

Normalized, peak potassium current density as a function of test potential in motoneurons treated with control serum (circles; n = 13), serum from Patient III (squares; n = 8), or serum from Patient IV (triangles; n = 8). At high potentials, average potassium currents were slightly smaller than control for motoneurons treated with serum from Patient III and slightly greater for motoneurons treated with serum from Patient IV. However, these changes were not statistically significant. The inset shows a representative family of control potassium currents elicited by test potentials of −30 to 60 mV at 10 mV intervals.