A 25-year-old bull rider developed neck pain and vertigo after landing head first when he was thrown from a bull. Physical examination in the emergency department revealed that the man had decreased pain and temperature sense on the left half of his face and right side of his body, a Horner's syndrome on the left, and hoarseness and unsteady gate. An occlusion in which of the following vessels would most likely explain the deficits experienced by this patient?
A) Posterior inferior cerebellar artery B) Anterior inferior cerebellar artery C) Basilar artery D) Vertebral artery E) Anterior spinal artery
A 74-year-old man was playing poker with his neighbors when he noticed that he was having difficulty picking up his cards with his left hand. Determining that he was fatigued from his day of yard work, he went home and to bed. The next morning he staggered and nearly fell making his way to the bathroom. Concerned about her husband's condition his wife takes him to the emergency room. Neurological examination indicates that the man is unable to elevate and adduct his right eye; however, abduction and depression of his right eye is normal. The eye movement abnormalities in this patient are most indicative of which of the following?
A) Right trochlear nerve palsy B) Right abducens nerve palsy C) Right oculomotor nerve palsy D) Left trochlear nerve palsy E) Left oculomotor nerve palsy
A 29-year old man was brought to the emergency department following a motor vehicle collision. He has normal pupillary light reflexes, unsteady gait, and loss of pain and temperature sense on the left side of his body and right side of his face. He most likely has a lesion in which of the following areas?
A) Periventricular area of the rostral midbrain B) Tegmentum of the rostral pons C) Ventrolateral medulla D) Periventricular medulla E) Thalamus bilaterally