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Innervation of muscles of posterior compartment of the thigh
sciatic n.
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Innervation of muscles of medial compartment of the thigh
ALL obturator n.
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Innervation of muscles of anterior compartment of the thigh
femoral n.
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Popliteus m
- 1. medial rotates
- 2. "unlocks" knee
- 3. flexes knee
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Flexor hallus longus
- 1. Flexor of hallux
- 2. Plantarflexor
- 3. Invertor
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Extensor digitorum longus
- 1. Dorsiflexor
- 2. Evertor
- 3. Extensor of 2-5
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Peroneus tertius
- Shaft of 5th metatarsal
- 1. Evertor
- 2. Dorsiflexor
deep peroneal n
-
Peroneus longus
- 1. Evertor
- 2. Plantarflexor
superficial peroneal n.
-
Peroneus brevis
- 1. Evertor
- 2. Plantarflexor
superficial peroneal n.
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Medial longitudinal arch
- Bones- *talus*, calcaneus, navicular, 3 cuneiforms, medial 3 MTs
- Spring ligament
- tendon of tibialis posterior (when active)
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Lateral longitudinal arch
- Bones- calcaneus, *cuboid*, lateral 2 MTs
- long plantar ligament
- short plantar ligament
- tendon of peroneus longus
-
Transverse arch
- Bones- navicular, 3 cuneiforms, cuboid, 5 MTs
- shaped like arc, so both feet standing together make arch
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Sacral plexus
lumbosacral trunk + S1 - S4
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Cutaneous-- lateral thigh (from what plexus?)
lateral cutan of thigh, lumbar plexus
-
Cutaneous-- anterior thigh (from what plexus?)
femoral n, lumbar plexus
-
Cutaneous-- medial thigh (from what plexus?)
obturator n, lumbar plexus
-
Cutaneous-- posterior thigh (from what plexus?)
posterior cutaneous n. of thigh, sacral plexus
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Pes anserinus (common action)
- sartorius, gracilis, semitendinosus
- -flexes knee
-
Action: posterior compartment of thigh
- extends hip:
- EXCEPTION: short head, biceps femoris is common peroneal. DOES NOT cross hip
The hamstrings- ALL flex knee
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Exception: INVERTORS from anterior compartment
- Tibialis anterior
- Extensor HALLUCIS longus
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Medial Compartment of thigh
- -ALL oburator
- -ADDuct hip
- 1. Gracilis- also, flex knee
- 2. Adductor longus
- 3. Adductor brevis
- 4. Adductor magnus
-
Gluteus medius
Gluteus maximus
Tensor fasciae latae
superior gluteal n.
- Abduct, medial rotate hip
- Tenor Fasciaw latae- ALSO-- flexes hip
-
Lateral rotators of hip
gluteus maximus, sartorius, piriformis, superior gemellus, obturator internis, inferior gemellus, obturator externus, quadratus femoris
-
Iliopsoas
MOST PWRFUL flexe or hip
- L1-L3 (psoas)
- femoral (iiacus)
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Pectineus
femoral and obturator n.
flex hip, adducts hip
-
interossei
lateral plantar n.
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Cutaneous of anterior leg
- 1. Medial two-thirds – saphenous
- 2. Lateral one-third – sural
- 3. Superficial peroneal innervates some distal lateral skin
-
Cutaneous of posterior leg
- 1. Medial one-third – saphenous
- 2. Lateral two-thirds – sural
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Plantar surface: Motor innerv
LAFF muscles
medial plantar nerve
- 1. First lumbrical
- 2. Abductor hallucis
- 3. Flexor hallucis brevis
- 4. Flexor digitorum brevis
Remainder--> lateral plantar nerve
-
extensor digitorum brevis
extensor hallucis brevis
deep peroneal n.
extend digits 2-4, extends hullux, respectively
-
Iliohypogastric nerve
(L1), supplies skin over the iliac crest and pubic region; motor to internal oblique and transversus abdominis muscles.
-
Ilioinguinal nerve
- (L1), skin of the external genitalia and adjacent medial thigh; motor to internal
- oblique and transversus abdominis muscles
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Genitofemoral nerve
genital branch to skin of external genitalia; motor to cremaster muscle.
femoral branch to skin of anterior superior thigh.
-
Lateral femoral cutaneous
skin on the lateral surface of the thigh
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Femoral nerve
abdomen, motor to the iliacus; continues to lower extremity
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Obturator nerve
supplies hip adductor muscles and small patch of skin on the thigh
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Lumbosacral trunk
joins sacral plexus in supplying pelvis and rest of lower extremity
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