Because vessels are large, they can be used as entry points to the vascular system. In addition, vessels in the lower limb are farthest from the heart and the most inferior in the body. Therefore, the nature of peripheral pulses in the lower limb can give important information about the status of the circulatory system in general.
Sensation and muscle action in the lower limb are tested to assess lumbar and sacral regions of the spinal cord.
Avoiding the sciatic nerve