A 55-year-old woman with known metastatic breast cancer presents to the emergency department complaining of new-onset weakness and numbness. The symptoms involve both arms and legs. She also has developed urinary incontinence over the past 24 hours. On physical examination, strength is 3/5 in the lower extremities and 4/5 in the upper extremities. Anal sphincter tone is decreased. -Babinski sign is positive. Sensation is decreased in the extremities, but not in the face. Cranial nerves are symmetric and intact, and mental status is normal. Based on this information, what is the most likely site of the lesion causing the patient’s symptoms?
A )Brainstem
B )Cerebrum
C) Cervical spinal cord
D )Lumbar spinal cord
E ) Neuromuscular junction