Figure 38. Diagrammatic representation

of the symptoms that result from acute destruction of the anterior cornua of the spinal cord.—(Bramwell.)
On the left side the destruction of the nerve-cells is complete; the anterior nerve-roots, motor nerve-fibers, and the muscles which they supply are all degenerated; there is a total "block" to the passage of voluntary motor and reflex motor impulses. On the right side two-thirds of the motor cells are destroyed; two-thirds of the muscular area connected with the right anterior cornu are degenerated and atrophied: one-third (M) remains healthy, and can be made to contract by voluntary or reflex motor impulses. (Lockwood.)

This image is from Anterior Poliomyelitis. in Thomas' Eclectic Practice of Medicine.

Figure 38. Diagrammatic representation