Gross Anatomy

PA: med 1/2 of inf border of 12th rib, lumbar TPs

DA: iliolumb lig, internal lip of iliac crest

Ant branch T12, L1-L4

Ext, lat flex vert colum, fix 12th rib

PA: sup iliac fossa, sacroiliac ligs

DA: lesser troch to psoas major tendon

Femoral n (l2-l4)

Flex thigh, stabilize hip

PA: TPs of lumb, sides of bodies T12-L5

DA: Strong tendon to lesser troch

Ant Rami L1, L2, L3

Flex thigh, lat flex vert column, balance trunk

PA: body of pubis, ischial spine

DA: perineal body, coccyx, rectum

N to levator ani

Most of pelv diaphragm, support viscera, resist intra-ab pressure

PA: ischial spine

DA: inf end of sacrum & coccyx

Branches S4, S5

Small part of pelv diaphragm to support viscera, flex coccyx

PA: ilium post to post gluteal line, dorsal surface of sacrum & coccyx

DA: IT band --> Gerdys tubercle

Inferior gluteal n (L5-S2)

Ext thigh especially when flexed, ER, steadies thigh

PA: ext surface of ilium btwn ant & post gluteal lines

DA: lat surface of g. troch

Superior gluteal N (L5, S1)

Abduct, IR, keep pelvis level while ipsilat leg WB

PA: ext surface of ilium btwn ant & inf gluteal lines

DA: ant surface of g troch

Superior Gluteal n (l5, s1)

Abduct, IR, keep pelvis level

PA: ASIS, ant iliac crest

DA: IT band --> gerdys tubercle

Superior Gluteal N (L5, s1)

Abduct, IR, keep pelv level

• PA: sup- ischial spine
• inf- ischial tuberosity

DA: medial surface of g troch

• Sup- Nerve to obturator internus (L5-s2)
• Inf- Nerve to quadratus femoris (L4-S1)

Laterally rotate extended thigh, ABDUCT flexed thigh

PA: pelv surface of obturator membrane

DA: Med surface of g. troch

Nerve to obturator internus

Lat rotate extended thigh, abduct flexed thigh

PA: post to pectineus

DA: trochanteric fossa

Obturator n (l3,l4)

Lat rotate, steady head

PA: lat border of ischial tuberosity

DA: quadrate tubercle on intertroch crest

N to quad fem (l4-s1)

Lat rotate thigh, steady head

PA: ant surface of sacrum

DA: sup border of g troch

Branches ant rami S1,s2

Lat rotate extended thigh, ABDUCT flexed thigh, steady head

PA: sup ramus of pubis (pectineal line)

DA: pectineal line of femur

Femoral n L2, L3

Adduct, flex thigh, IR

PA: ASIS

DA: sup border of medial surface of tib (pes anserine)

Femoral N L2, L3

Flex, Abd, Ext Rot, Flex knee (4 dog shit)

PA: AIIS

DA: Quad tendon

Femoral n L2, L3, L4

• Extend leg at knee
• ** also flex thigh

PA: lat lip of linea aspera

DA: Quad tendon

Femoral n L2, L3, L4

Extend leg at knee

PA: intertroch line, med lip of linea aspera

DA: Quad tendon

Femoral n L2, L3, L4

Extend leg at knee

PA: ant & lat surface of femur shaft

DA: Quad tendon

Femoral n L2, L3, L4

Extend leg at knee

PA: Body of pubis inferior to pubic crest

DA: middle linea aspera

Obturator n (l2, l3, l4)

Adduct thigh

PA: body & inf ramus of pubis

DA: pectineal line & proximal part of linea aspera

Obturator n L2, l3, l4

Adducts thigh, helps w/ flexion

• PA: add-inf ramus of pubis, ramus of ischium
• hammy- ischial tuberosity

• DA: add-gluteal tub, linea aspera
• hammy-add tubercle of femur

• Add: obturator n- l2, l3, l4
• Hammy: tibial part of sciatic n (l4)

• both adduct
• add- flex thigh
• hammy- ext thigh

PA: body & inf ramus of pubis

DA: Sup part of medial surface of tibia (pes anserine)

Obturator n (l2, l3)

Adduct thigh, flex leg, helps IR

PA: ischial tub

DA: pes anserine

Tibial part of sciatic n (L5, s1, s2)

Ext thigh, flex leg, also IR when flexed

PA: Ischial tuberosity

DA: post part of medial condyle of tibia

Tibial part of sciatic n (L5, s1, s2)

Ext thigh, flex leg, also IR when flexed (SAME AS SEMITEND)

• PA: longhead- ischial tub
• shorthead-linea aspera

DA: lat side of head of fibula

• Long-tibial part of sciatic n
• short-common fib of sciatic

Flex leg, ER when flexed, extend thigh

PA: lat tibial condyle, sup lat tibia, interosseous membrane

DA: medial surface of med. cuneiform, base 1st MT

Deep Fibular n (l4,l5)

Dorsiflex, Inversion

PA: lat tibial condyle, superior anterior surface of fibula, IO membrane

DA: mid & distal phalynx 2-5

Deep Fibular n (l4,l5)

• Extends 4 toes (DIP, PIP, MTP)
• Dorsiflex

PA: middle ant surface of fibula, IO membrane

DA: distal phalynx great toe

Deep fibular n (l4,l5)

• Dorsiflex
• Ext IP, MTP of big toe

PA: distal ant surface of fibula

DA: base to shaft 5th MT

Deep fibular n (L5,S1)

Dorsiflex, EVersion

PA: head & sup lateral fibula

DA: medial cuneiform & base of 1st MT (same as tib ant but on inside)

Superficial fibular (l5, s1, s2)

Plantarflex, Eversion--- antagonist to tib ant

PA: lower lateral fibula

DA: tuberosity of 5th MT

Superficial fibular (L5,s1)

Plantarflex, Eversion (same as fib longus)

• PA: lat head- lat aspect of lat condyle of femur
• med head- popliteal surface of femur, sup to medial condyle

DA: post surface of calcaneous via calcaneal tendon

Tibial n (s1,s2)

Plantarflex when knee ext, flexes leg @ knee

PA: post aspect of head & sup post surface of fibula ; soleal line & medial border tibia

• DA:post surface of calcaneous via calcaneal tendon
• * same as gastroc & plantaris

tibial n s1,s2

Plantarflex (independent of knee)

PA: inf end of lat supracondylar line of femur; oblique popliteal lig

• DA: post surface of calcaneous via calcaneal tendon
• *** same as gastroc & soleus

Tibial n s1, s2

Weakly assist gastroc

PA: lat condyle of femur, lat meniscus

DA: post surface of tibia, above soleal line

tibial n (l4-s1)

Weakly flex knee, IR

PA: IO membrane, posteromed fibula, posterolat tibia

DA: tuborosity of navicular, cuboid, cuneiforms, MT 2-4

Tibial n (l4,l5)

Plantarflex, INversion