Case 254. (Tubby, January, 1915.)

A private was wounded by a shell fragment, September 16, 1914, and admitted to the London General Hospital, September 27. A high-velocity shell fragment had passed through the soft parts of the left arm at a spot exactly corresponding to the musculospiral groove. He could extend the middle finger of the left hand, but the other fingers were held in flexion. The last two phalanges of index finger could not be moved, it was found, on account of severance of the extensor tendon some years previously. Accordingly, the loss of function due to the shell injury was that of thumb, ring, and little fingers. Supination could not be executed completely to the extent of 15 degrees; there was no R. D. upon electrical test, October 2. The sensation of affected fingers was woolly. November 3, the little finger had recovered, but supination could not be completely executed.

The treatment consisted in a bent malleable iron splint, with the wrist and affected fingers hyperextended. November 20 all power had returned with full supination, except for the two phalanges of index finger previously injured.

Major Tubby thinks this a case of physiological blocking, as from a small hemorrhage amongst the fibers or around the nerve.

Re inhibition, Myers thinks it is the functional cause of the effects of shell-shock. He thinks it is not a fixation of the idea of the paralysis of volition, but that it is a fixation of the process of inhibition itself that produces the effects we see in Shell-shock. It is a block of ascending paths that produces the anaesthesia so characteristic of Shell-shock. It is a blocking of sensory paths that produces mutism or aphonia. But according to Myers, there is also a block in certain cases of descending paths that control and coördinate various mechanisms. The result of a block in the descending paths is shown in spastic, clonic, or ataxic phenomena of, e.g., functional dysarthria. See also Case 253 (Tinel).