1. The interference curve of the normal muscle on maximal voluntary contraction is found also in cases of severe weakness. Roughly speaking, when the muscle is just able to perform a movement in the joint, "single -discharge " is observed. The reduction in the number of spikes in advanced cases shows a patchy distribution in the muscle
2. Greater response to the exploring needle electrode;fibrillation, Spontaneous
3. Greater duration and larger amplitude of the action potentials. Polycyclic potentials may occur. Altenburger, H;3, 944. Berlin,1937
4. Bowden, R. E. M., and Gutmann, E. (1946). Arch. Neurol. Psychiat., Chicago, 56, 1.
5. Buchthal, F., and Clemmesen, S. (1941). Acta Psychiat. Kbh., 16, 143. ~(1943). Ibid., 18, 377.