Clinical features of Conus Medullaris syndrome include all of the following Except:: (A) Plantar Extensor, (B) Absent knee & ankle jerks, (C) Sacral anesthesia, (D) Lower sacral & coccygeal involvement
Answer is B. The root value of Conus medullaris is S1-S5. Hence in conus medullaris syndrome, knee-jerk is preserved but ankle jerk is lost. Due to the involvement of coicospinal pathway, extensor plantars will be seen.