A 45-year-old left-handed man presents to the emergency department with an injury to his left hand. He was playing basketball with his son and developed sudden onset of pain in the distal aspect of his long finger when trying to catch the ball. Exam findings at rest are shown above. The patient is unable to actively extend his distal interphalangeal joint. Which of the following is the most likely diagnosis?a. Spinal shock
b. Central cord syndrome
c. Anterior cord syndrome
d. Brown-Séquard syndrome
e. Cauda equina syndrome