CUTANEOUS INNERVATION OF THIGH: *THE ILIO-LINGUAL NERVE (L1), a branch of the lumbar plexus, supplies the skin: -at the root of penis in the male or over the mons pubis in the female, -at the anterior one-third of the scrotum (male) or labium majus(female), -at the superomedial part of the thigh. *THE FEMORAL BRANCH OF GENITO FEMORAL NERVE(L1,L2), which is in turn a branch of the lumbar plexus, supplies the skin over the femoral triangle.
*THE LATERAL CUTANEOUS NERVE OF THIGH(L2,L3), also abranch of the lumbar plexus, supplies the skin: -on the anterolateral side of thigh & -the anterior part the gluteal region, -by dividing into anterior and posteriorbranches.*THE INTERMEDIATE CUTANEOUS NERVE OF THIGH(L2,L3) isa branch of the anterior division of femoral nerveand supplies a strip of skin on the front of thighextending from the sartorius muscle to the knee.*THE MEDIAL CUTANEOUS NERVE OF THIGH(L2.L2) is also abranch of the anterior division of the femoral nerve.It supplies the skin on the medial side of the lowertwo-thirds of the thigh.
THE PATELLAR PLEXUS: -a plexus of fine nerves situated inthe front of the patella, the ligamentumpatellae, and the upper end of the tibia. -formed by the contributions from: 1)The anterior division of the lateralcutaneous nerve, 2)The intermediate cutaneous of thigh, 3)The anterior division of the medialcutaneous nerve, 4)The infrapatellar branch of the saphenousnerve.
CUTANEOUS INNERVATION OF THE GLUTEALREGION: The cutaneous nerves converge on the gluteal region from all directions. 1)The upper and anterior part is supplied by the LATERAL CUTANEOUS BRANCHES OF THE SUBCOSTAL T12 and ILIOHYPOGASTRIC L1 nerves. 2)The upper and posterior part is supplied by the posterior primary rami of spinal nerves L1, L2, L3 and S1, S2, S3. 3)The lower and the anterior part is supplied branches from the posterior division of the LATERAL CUTANEOUS NERVE OF THE THIGH(S1, S2)
4)The lower and the posterior part is supplied by thebranches from the posterior cutaneous nerve of thethigh (s1, s2, s3) and the perforating cutaneousNerve (S2, S3).
CUTANEOUS INNERVATION OF THE LEG anddorsum of foot:1)THE SAPHENOUS NERVE is a branch of the femoralnerve. It supplies the skin of the medial sid eofthe leg and the medial border of the foot up tothe ball of the big toe.2)THE INFRAPATELLAR BRANCH of the Saphenous nervesuplies the skin over the ligamentum patellae.3)THE LATERAL CUTANEOUS NERVE OF THE CALF is abranch of the common peroneal nerve. It suppliesthe skin of the upper two-thirds of the lateralside of the leg.
4)THE SUPERFICIAL PERONEAL NERVE is a branch of thecommon peroneal. It supplies -the skin over the lower one-third of thelateral of the lateral side of the leg, -the skin over the dorsum of the footexcept the lateral border(sural nerve), medialborder(saphenous nerve), and the cleft between 1stand 2nd toes(deep peroneal nerve).5)THE SURAL NERVE is a branch of the tibial nerve.It supplies the skin of the lower half of the backof leg and the whole lateral border of the foot upto the tip of the little toe.6)THE DEEP PERONEAL NERVE supplies the skin on thecleft between 1st and 2nd toes.
7)THE DIGITAL BRANCHES OF THE MEDIAL AND LATERALPLANTAR NERVES supply the distal parts of thedorsum of the toes. Medial plantar nerve-medial 3 1/2 toes. Lateral plantar nerve-lateral 1 ½ toes.
Cutaneous innervation of sole of foot: 1)LATERAL PLANTAR NERVE supplies lateral one fourth of foot . 2)MEDIAL PLANTAR NERVE supplies medial three fourths of foot . 3)MEDIAL CALCANEOUS NERVE, a branch of TIBIAL nerve (just before it divides into medial and lateral plantar nerves) supplies the skin over calcaneus .
Applied aspects:AFFECTED SENSORY LOSSNERVEFEMORAL NERVE Anterior side of thigh and medial side of leg upto big toe.SCIATIC NERVE Back and lateral side of leg, most of dorsum of foot, sole of foot.COMMONPERONEAL Lateral & anterior side of leg, most of dorsum of foot, most of digits.TIBIAL Skin of sole. Trophic ulcers can develop.OBTURATOR Small area on the medial side of thigh.SUPERIOR GLUTEAL -INFERIOR GLUTEAL -PUDENDAL Skin of perineumDEEP PERONEAL 1st inter digital cleftSUPERFICIAL Lateral side of leg, most of dorsum of foot.PERONEAL
INJURED NERVE SENSORY LOSSMEDIAL PLANTAR Medial 2/3 rd of sole and digital nerves to medial 3 ½ toes, including nail beds.LATERAL PLANTAR Lateral 1/3 rd of sole and digital nerves to lateral 1 ½ toes, including nail beds.