Pure Motor Monoparesis in the Leg due to a Lateral Medullary Infarction

Figure 1

(a) Fluid-attenuated inversion recovery image and (b) diffusion-weighted image of cranial magnetic resonance imaging on the axial images demonstrated a small infarct lesion in the lower lateral medulla oblongata on the left side (arrow). (c) Cranial magnetic resonance angiography demonstrated an absence of flow of the left vertebral artery.