Question

in doing a physical exam on mary you noted that when you do the babinski reflex there is an upward rise of her toes. this suggests that there is a lesion above: l4 l5 s1 s4

Explanation:

The Babinski reflex is an abnormal reflex in adults and indicates a lesion in the corticospinal tract. The corticospinal tract descends through the spinal cord. The L4 level is part of the spinal cord where such a lesion above it can lead to an abnormal Babinski reflex (upward toe rise).

Answer:

L4