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Lumbosacral Plexus!
Innervations of the LumboSacral Plexus
Question | Answer |
---|---|
Iliohypogastric nerve | (T12,L1) Innervates 1. External Obliques 2. Internal Obliques transverse abdominis |
Ilioguinal nerve | (T12,L1) Innervates 1. External Obliques 2. Internal Obliques transverse abdominis |
Genitofemoral nerve | (L1,L2) Innervates 1. Cremaster muscle 2. Skin of anterior thigh |
Nerves to Iliacus & Psoas Major | (L2,L3) Innervates 1. Psoas Major & Minor 2. Contribute to femoral nerve |
Femoral nerve | (L2,L3,L4) Innervates 1. Psoas 2. Iliacus 3. Pectineus 4. Sartorius 5. Rectus femoris 6. Vastus medialis 7. Vastus lateralis 8. Vastus intermedius |
Obturator nerve | (L2,L3,L4) Innervates 1. Adductor brevis 2. Adductor longus 3. Adductor magnus (anterior portion) 4. Gracilis 5. Obturator externus |
Superior Gluteal nerve | (L4,L5,S1) Innervates 1. Gluteus medias 2. Gluteus minimus 3. Tensor fascia latae |
Inferior Gluteal nerve | (L5,S1,S2) Innervates 1. Gluteus maximus |
Nerve to Obturator Internus & Superior Gemellus | (L5,S1,S2) Innervates 1. Obturator Internus 2. Superior Gemellus |
Nerve to the quadratus femoris & inferior gemellus | (L4,L5,S1,S2,S3) Innervates 1. Quadratus femoris 2. Inferior gemellus |
Nerve to piriformis | (S2) Innervates 1. Piriformis |
Prudenal nerve | (S2,S3,S4) Innervates 1. External anal sphincter |
Peroneal division of Sciatic nerve | (L4,L5,S1,S2,S3) Innervates 1. Biceps femoris short head |
Tibial nerve | (L4,L5,S1,S2) Innervates 1. Plantaris 2. Popliteus 3. Gastrocnemius 4. Soleus 5. Flexor digitorium longus 5. Flexor hallicus longus 6. Tibialis posterior |
Tibial division of Sciatic nerve | (L4,L5,S1,S2,S3) Innervates 1. Biceps femoris long head 2. Semitendinosus 3. Semimembranosus 4. Posterior portion of Adductor magnus |
Common Peroneal nerve | Splits into 1. Deep common peroneal nerve 2. Superficial peroneal nerve |
Deep Common Peroneal nerve | (L4,L5,S1) Innervates 1. Tibialis anterior 2. Extensor digitorium longus 3. Extensor hallicus longus 4. Peroneus tertius 5. Extensor hallicus brevis 6. Extensor digitorium brevis |
Superficial Common Peroneal nerve | (L4,L5,S1) Innervates 1. Peroneus longus 2. Peroneus brevis |
LumboSacral Plexus | L1, L2, L3, L4, L5, S1, S2, S3, & S4 |
Medial Plantar nerve | (L4,L5,S1) Innervates 1. Flexor digitorium brevis 2. Abductor hallicus 3. Flexor hallicus brevis 4. 1st lumbrical |
Lateral Plantar nerve | (S1,S2) Innervates 1. Adductor hallicus 2. Quadratus plantae 3. Abductor digiti minimi 4. Flexor digiti minimi 5. Plantar innterossei (3) 6. Dorsal interossei (4) 7. Lumbricals (lateral 3) |