If a patient experiences enlargement of the normally rudimentary central canal of the spinal cord in the MID cervical region, which, if any, muscular functions would become abnormal first?
Ans. C. Shoulder abductionMotor neurons controlling axial muscles are positioned most medially in the ventral horn area. An enlarged central canal would impinge on that pool of motor neurons first.
Finger flexion
Elbow flexion
Shoulder abduction
Truncal extension
Nervous System