A 67-year-old woman with a history of hypertension, hyperthyroidism, and atrail fibrillation awoke early one morning with pain behind her right eye. She tried to walk to the bathroom but fall at the doorway. Her family later found her on the floor, unable to move her left side, and as they called the ambulance she kept repeating "do not call anyone" because she believed that nothing was wrong. On exam, when shown her left hand and asked what it was, she replied, "someone's hand". When asked whose hand it was, she replied "the doctor's".

She had no blink to threat on the left and no voluntary gaze to the left past the midline, and there was marked weakness of the lower portion of the left face. Strength was 0/5 in the left arm and leg, the left plantar response was upgoing, and there was no response to pinprick on the left side.

On the basis of the signs and symptoms shown in bold above, where is the lesion?