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One of the regular subjects, a toothless old man with nerve damage so severe that he could not feel the electrodes, is having his left platysma muscle “electrized.”

The platysma myoides, which is well developed on the neck, belongs to this system, but cannot be voluntarily brought into action.

In all cases the contraction of the platysma causes the wound to gape widely, and its edges tend to be turned in.

Cautiously divide skin, platysma, and fascia; the lower end of the parotid must be pulled upwards, and the veins, which are numerous, cautiously separated.

He could throw into energetic single action the biceps, the supinator longus, the radial extensors, the platysma myoides, and many other muscles.