We all know the musketeers were four. Well, actually 3 + 1. That last one was always somewhat mysterious.

We all know the quadriceps has four members, too. However one is still rather a mystery to rehabilitators and personnel in the field alike, and being a deep muscle, is hidden to clinical and instrumental quick assessments. The Vastus intermedius.

I’m glad to share the link to this paper, that for the first time in literature introduces a descriptive analysis of the Vastus intermedius activation during gait in stroke patients with stiff knee, as assessed by fine wire electrodes. Never forget D’Artagnan!