Brains II

Hemiplegia?

In an adult, a PURE motor hemiplegia (sensory spared) is nearly always from midbrain (vascular or other) and further refined by if other abnormal things (facial) are on same side ( higher before sides cross) or on the opposite side (below the crossing). Also note that the “Circle of Willis” is only a circle ON AVERAGE (lumping humanity in a single image). Typically it is “C” shape with a token narrow connection to form a full circle. The variability accounts for the variation of signs in many vascular distributions – especially in vaso-spasm syndromes.