Lateral femoral cutaneous nerve
Nerve Supply |
Sensory Innervation |
L2 + L3 |
Skin over anterolateral thigh and lateral knee |
* This nerve is associated with Meralgia Paresthetica = the compression of the Lateral femoral cutaneous nerve as it passes through the inguinal ligament.
*Causes shooting pain down the lateral aspect of the thigh
*Common in gymnasts, scuba divers = when clothing is too tight and compresses inguinal ligament
Sciatic Nerve (Tibial Division)
Nerve Supply |
Motor Innervation |
Sensory Innervation |
L4-S3 |
Muscles of the posterior thigh (Hamstring muscles: biceps femoris, semimembranosus and semitendinosus) and hamstring portion of adductor magnus + muscles of the posterior leg (Gastrocnemius, Soleus, Tibialis Posterior, Flexor Digitorum Longus, Flexor Hallucis Longus, Popliteus |
Innervates the skin of the posterolateral leg, lateral foot and the sole of the foot. |
* The primary action of these muscles is PLANTARFLEXION of the foot.
1. Tarsal tunnel syndrome
2. “claw foot” (hyperext MTP, flex IP)
3. Inability to plantar flex and invert = slap
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Iliohypogastric Nerve
Nerve Supply |
Motor Innervation |
Sensory Innervation |
L1 |
Muscles of the abdomen: rectus abdominis, obliques |
Skin of suprapubic region |
Ilioinguinal nerve
Nerve Supply |
Motor Innervation |
Sensory innervation |
L1 |
Abdominal muscles: transverse abdominal muscle, internal oblique muscle |
Medial thigh and external genitalia |
Femoral Nerve
Nerve Supply |
Motor Innervation |
Sensory Innervation |
L2-L4 |
Innervates the anterior thigh muscles that flex the hip joint (pectineus, iliacus, sartorius) and extend the knee (quadriceps femoris: rectus femoris, vastus lateralis, vastus medialis and vastus intermedius) |
Supplies cutaneous branches to the anteromedial thigh (anterior cutaneous branches of the femoral nerve) and the medial side of the leg and foot (saphenous nerve). |
Common Fibular/Peroneal Nerve (Sciatic Nerve)
Nerve Supply |
Motor Innervation |
Sensory Innervation |
L4-S2 |
Short head of biceps femoris. The superficial fibular nerve innervates the muscles of the lateral compartment of the leg; fibularis longus and brevis (foot eversion). The deep fibular nerve innervates the muscle of the anterior compartment of the leg; tibialis anterior, extensor digitorum longus and extensor hallucis longus. These muscles act to dorsiflex the foot and extend the digits. It also innervates some intrinsic muscles of the foot. |
Superficial fibular nerve: Innervates the skin of the anterolateral leg, and dorsum of the foot (except the skin between the first and second toes). Deep fibular nerve: Innervates the skin between the first and second toes. |
Dysfunction of CFN:
Foot Drop (inability to dorsiflex the ankle)
Presentation
• High stepping gait to prevent scraping toes
• Cant evert foot on uneven surfaces
Causes
Herniated disc compressing L5 = foot drop
Knee dislocation = foot drop
Lateral blow/trauma to the head of fibula= foot drop
Compensate by exaggerated hip and knee flexion (+ external rotation) to avoid dragging the toes along the ground
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Genitofemoral Nerve
Nerve Supply |
Sensory innervation |
L1 + L2 |
Skin over external genitalia and lateral femoral triangle |
Obturator Nerve
Nerve Supply |
Motor Innervation |
Sensory innervation |
L2 - L4 |
Innervates the muscles of the medial compartment of the thigh (obturator externus, adductor longus, adductor brevis, adductor magnus and gracilis). |
the skin of the medial thigh. |
Superior Gluteal Nerve
Nerve Supply |
Motor Innervation |
L4-21 |
Superior to piriformis and innervates the gluteus medius + minimus and Tensor Fasciae Latae |
Inferior Gluteal Nerve
Nerve Supply |
Motor Innervation |
L5-S2 |
Exits inferior to piriformis and innervates gluteus maximus muscle only |
Posterior Femoral Cutaneous Nerve
Nerve Supply |
Sensory Innervation |
S1-S3 |
posterior regions of thigh, proximal part of leg, and skin of perineum |
PFCN entrapment has posterior buttocks and thigh pain, from the gluteal fold to the back of the knee
Pudental Nerve
Nerve Supply |
Motor Innervations |
Sensory Innervation |
S2-S4 |
innervates various pelvic muscles, the external urethral sphincter and the external anal sphincter. |
innervates the external genitalia of both sexes and the skin around the anus, anal canal and perineum |
A pudendal nerve block is a form of analgesia occasionally given before vaginal childbirth, episiotomy and other minor vaginal procedures.
Epidural targets S2-S4
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