5 下列何者不是胸部脊髓損傷（thoracic spinal cord injury）病患之臨床特徵？
(A)impaired pinprick sensation below T6
(B)reduced abdominal reflex
(C)presence of Babinski sign
(D)hyperactive biceps reflex

biceps為臂神經叢控制，神經來自C5...