MICROANATOMY

Detailed explanation-1: -The lumbosacral plexus is a network of nerve fibers, derived from the roots of lumbar and sacral spinal nerves that branch out to form the nerves supplying the lower limb.

Detailed explanation-2: -The sacral plexus (plexus sacralis) is a nerve plexus that provides motor and sensory nerves for the posterior thigh, most of the lower leg, the entire foot, and part of the pelvis (see the following image).

Detailed explanation-3: -The lumbar plexus is an essential collection of nerves that arise from mostly the lumbar spinal cord. The term plexus refers to a “web” of nerves that is created just lateral to where T12-L5 exit the spinal cord via intervertebral foramina.

Detailed explanation-4: -The lumbar plexus, formed by the ventral primary rami of L1–4, travels through the posterior psoas muscle and anterior to the L2–5 transverse processes. The sacral plexus, located deeper within the pelvis between the pelvic fascia and piriformis muscle, connects to the lumbar plexus via the lumbosacral trunk.

Detailed explanation-5: -In human anatomy, the sacral plexus is a nerve plexus which provides motor and sensory nerves for the posterior thigh, most of the lower leg and foot, and part of the pelvis.