Lumbar Plexus Anatomy Quiz

Nerve responsible for sensation in the skin of the anteromedial thigh, medial leg, and foot, as well as for motor control of the quadriceps muscle (thigh extension).

Branches of the femoral nerve that supply sensory innervation to the skin of the anterior and medial thigh.

A nerve that originates from the lumbar plexus and supplies motor innervation primarily to the hip adductor muscles, aiding in thigh adduction movements.

Muscles innervated by the obturator nerve: obturator externus, adductor longus, adductor brevis, adductor magnus, gracilis, and pectineus.

A nerve that provides sensory innervation to the anterior labial/scrotal skin, skin over the pubis, and superior antero-medial thigh.

A nerve that provides motor innervation to the transversus abdominis and the internal oblique muscles.

This nerve provides sensory innervation to the proximal medial thigh and contributes to hip joint sensation.

The ilioinguinal nerve can be injured during inguinal hernia repair surgeries, potentially causing chronic groin pain.

The sacral plexus is located on the posterior pelvic wall and is formed by the ventral rami of spinal nerves L4, L5, S1-S4. This plexus gives rise to numerous nerves that innervate the lower limb.

This branch of the genitofemoral nerve provides sensation to the anterior, upper, and medial parts of the thigh.

A branch of the sacral plexus that innervates the gluteus medius, gluteus minimus, and tensor fasciae latae muscles, all responsible for hip abduction and external rotation.

A branch of the sacral plexus that innervates the gluteus maximus muscle, responsible for hip extension and external rotation.

This branch of the genitofemoral nerve provides sensation to the anterior scrotal skin in males and the mons pubis and labia majora in females.

The genital branch of the genitofemoral nerve supplies the cremaster muscle in males, which elevates the testes.

This nerve originates from the lateral border of the psoas major muscle and emerges anterior to the sartorius muscle.

The lateral femoral cutaneous nerve provides sensory innervation to the skin of the anterior and posterior lateral thigh, extending down to the knee.

The perforating cutaneous nerve arises from spinal nerve roots S2-S3, exits the pelvis through the greater sciatic foramen, and provides cutaneous innervation to the inferior medial part of the buttock.

The posterior femoral cutaneous nerve originates from the posterior divisions of the sacral plexus (S1-S3), exits the pelvis through the greater sciatic foramen, and travels deep to the gluteus maximus to supply the posterior surface of the thigh and leg.

The nerve to the quadratus femoris originates from L4-S1, exits the pelvis through the greater sciatic foramen, and supplies the quadratus femoris and inferior gemellus muscles as well as a branch to the hip joint.

The nerve to the obturator internus originates from L5-S2, exits the pelvis through the greater sciatic foramen, enters the lesser sciatic foramen, and supplies the obturator internus and superior gemellus muscles.

The pudendal nerve (S2-S4) is a branch of the sacral plexus and provides motor and sensory innervation to the perineum.

The sciatic nerve (L4-S3) is the largest nerve in the human body and arises from the sacral plexus.

The tibial nerve is a branch of the sciatic nerve that supplies motor innervation to the posterior muscles of the leg.

The common fibular nerve is a branch of the sciatic nerve and innervates the anterior and lateral compartments of the leg, providing sensation to the dorsum of the foot.

The iliohypogastric nerve originates from spinal nerves T12 and L1, runs along the psoas major muscle, pierces the transversalis muscle near the iliac crest, and branches into anterior and lateral cutaneous branches.

The iliohypogastric nerve provides sensory innervation to the skin of the posterolateral gluteal region through its lateral cutaneous branch, and to the skin of the suprapubic region via its anterior cutaneous branch.

The iliohypogastric nerve contributes to the motor function of the transversalis muscle, internal oblique muscle, and the conjoint tendon, all involved in abdominal wall movement.

Damage to the iliohypogastric nerve can occur due to surgical procedures, sports injuries, or pregnancy-related abdominal expansion. Symptoms include burning pain in the suprapubic and inguinal regions.

The ilioinguinal nerve originates from spinal nerve L1, travels behind the psoas major muscle, crosses the quadrates lumborum muscle, pierces the transversalis muscle, and passes through the internal oblique muscle.

T12, L1, L2, L3, and L4 spinal nerves form the lumbar plexus. The anterior ramus of T12 also contributes.

The femoral nerve is a major nerve of the lumbar plexus, originating from spinal nerves L2-L4, and responsible for innervating the anterior thigh muscles and providing sensory input for the anterior thigh and knee.

The obturator nerve, originating from spinal nerves L2-L4, innervates the medial thigh muscles and provides sensory input for the medial thigh.

The medial sural cutaneous nerve is a branch of the tibial nerve. It provides sensory innervation to the medial aspect of the leg.

The tibial nerve provides motor innervation to the muscles of the posterior compartment of the leg. This includes muscles involved in plantarflexion of the ankle and flexion of the knee.

The lateral plantar nerve is a branch of the tibial nerve that innervates the lateral aspect of the foot. It supplies motor innervation to muscles controlling movement of the little toe and its surrounding region.

The medial plantar nerve is a branch of the tibial nerve responsible for innervating the medial aspect of the foot. It primarily controls the movement and sensation of the big toe and the area around it.

The common fibular nerve is a major nerve in the lower limb that branches into the deep and superficial fibular nerves. It provides motor innervation to muscles involved in dorsiflexion and eversion of the foot, as well as sensory innervation to the lateral and anterior parts of the leg and foot.

The Deep fibular nerve supplies motor function to the muscles of the anterior compartment of the leg, which are responsible for dorsiflexion and inversion of the foot. It also provides sensory innervation to the skin between the big toe and the second toe.

The superficial fibular nerve provides motor function to muscles involved in eversion of the foot. It also provides sensory innervation to the anterior surface of the leg and the dorsal (top) surface of the foot.

The sural nerve is formed by the union of the medial sural cutaneous nerve and the lateral sural cutaneous nerve. It provides sensory innervation to the back of the leg and the lateral side of the foot.