Awasome L4 L5 Pinched Nerve References. Web the lumbar plexus is a network of nerve fibres that supplies the skin and musculature of the lower limb. A prominent spinous process in the middle and two transverse processes on the sides.

Web a pinched nerve occurs when too much pressure is applied to a nerve by surrounding tissues, such as bones, cartilage, muscles or tendons. Herniated disks often affect one side of the body. If your herniated disk is in your lower back, you'll typically feel pain in your lower back, buttocks, thigh and calf.