Attachments, innervations, actions of LL

Gluteus Maximus

Inn: inferior gluteal nerve

Action: hip extension/lateral rotation of the hip (helps prevent hip abduction)

A: posterior sacrum/ilium

B: posterior lateral femur

Gluteus Medius and Gluteus Minimums

Inn: superior gluteal nerve

A: lateral ilium

B: greater trochanter (lateral femur)

Action: abduction/medial hip rotation

Tensor Fascia Lata

Inn: superior gluteal nerve

A: illiac crest

B: lateral tibia (iliotibial tract)

Action: abduction/medial rotation/flexion

what is the action of the gluteus maximus

hip extension and lateral rotation

what are the two attachments of the tensor fascia lata

iliac crest and the lateral part of the tibia (illiotibial tract)

what two components is the iliopsoas made out of

psoas major and the illiacus

psoas major

A: Lumbar vertebrae

B:iliacus

Inn: L2-L3

Action: hip flexion

Illiacus

A: illiac fosa

B: lesser trochanter

action: hip flexion

inn: femoral nerve

What action are the iliopsoas muscles responsible for?

hip flexion

Piriformis

A: anterior sacrum

B: greater trochanter

Action: abduction and lateral hip rotation

Quadratus femoris

A: ischial tuberosity

B: intertrochanteric crest

Action: lateral rotation of hip

Superior/Inferior Gemellus

A: ischial Spine

B: proximal femur

Action: lateral hip rotation/abduction

Obturator internus

A: ischium

B: medial greater trochanter (prox. femur)

Action: abduction/lateral hip rotation

what is the A attachment of the superior/inferior gemellus

ischial spine because it goes from medial to lateral with a B attachment of the obturator internus tendon

what is the action of the piriformis

lateral rotation of the hip and abduction

what are the attachments of the quadratus femoris

A: ischial tuberosity

B: intertrochanteric crest

Rectus Femoris

A: anterior illiac spine

B: patella/tibial tuberosity

Inn: femoral nerve

Action: hip flexion, knee extension

Sartorius

A: anterior superior illiac spine

B: medial proximal tibia

Action: lateral hip rotation, knee flexion, abduction

Inn: femoral nerve

Vastus medius

A: linea aspera of femur

B: patella/tibial tuberosity

Action: knee extension

inn: femoral nerve

Vastus intermedius

A: anterior part of femur

B: patella/tibial tuberosity

Inn: femoral nerve

Action: knee extension

Vastus Lateralis

A: linea aspera of femur

B: patella/tibial tuberosity

Action: knee extension

Inn: femoral nerve

what connections do all three of the vastus muscles have?

tibial tuberosity

what is the action of the rectus femoris

hip flexion and knee extension

what are the attachment points of the sartorius

A: ant. sup. iliac spine

B: medial tibia

Adductor Longus

A: body of pubis

B: linea aspera of the femur

Inn: Obturator nerve

Action: adduction and flexion of hip

Adductor Magnus

A: inferior pubic ramus

B: linea aspera

inn: obturator nerve

action: hip adduction/extension/flexion

Adductor Brevis

A: inferior pubic ramus

B: proximal linea aspera

Action: hip adduction/flexion

Inn: obturator nerve

Pectineus

A: superior pubic ramus

B: pectineal line of femur

Inn: obturator nerve

Action: hip adduction/flexion

Gracilis

A: inferior pubic ramus

B: medial proximal tibia

action: hip adduction/flexion and knee extension

inn: obturator nerve

what job do all the medial thigh muscles have in common?

Hip adduction and flexion (if really big then hip extension as well)

Biceps femoris

A: ischial tuberosity

B: head of fibula

Action: limits knee extension, flexion

Inn: sciatic nerve

Semimembranosus

A: ischial tuberosity

B: medial posterior tibia

Action: knee flexion (and hip extension)

Inn: sciatic nerve

Semitendinosus

A: Ischial tuberosity

B: medial proximal tibia

Action: knee flexion (and hip extension)

Inn: sciatic nerve

What proximal attachment do all posterior thigh muscles have in common?

A: ischial tuberosity

Fibularis longus

A: lateral fibula

B: 1st metatarsal

Inn: superficial fibular nerve

Action: plantar flexors

Fibularis Brevis

A: Lateral fibula (distal)

B: 5th metatarsal

Inn: superficial fibular nerve

Action: plantar flexion/eversion

Tibialis anterior

A: Lateral Tibia

B: 1st metatarsal/navicular

Inn: deep fibular nerve

Action: dorsiflexion/inversion

Extensor digitorum longus

A: anterior fibula

B: distal phalanges of digits 2-5

Inn: deep fibular nerve

Action: dorsiflexion/inversion

Extensor hallucis longus

A: anterior fibula

B: distal phalanx of the 1st digit

Inn: deep fibular nerve

Action: dorsiflexion/inversion

Fibularis Tertius

A: anterior distal fibula

B: 5th metatarsal

Inn: deep fibular nerve

Action: dorsiflexion/inversion

Soleus

A: head of fibula

B: calcaneus

Inn: tibial nerve

Action: plantarflexion

Gastrocnemius

A: medial/lateral condyle of femur

B: calcaneus

Action: plantar flexion

Inn: tibial nerve

Plantaris

A: distal femur

B: calcaneus

Inn: tibial nerve

Action: plantarflexion

Popliteus

A: lateral condyle of femur

B: proximal tibia

Inn: tibial nerve

Action: knee flexion/knee stabilization

Flexor digitorum longus

A: posterior tibia

B: distal phalanges of digits 2-5

Action: plantar flexion

Inn: tibial nerve

Flexor digitorum longus

A: posterior tibia

B: distal phalanges of digits 2-5

Inn: tibial nerve

Action: plantarflexion

Tibialis Posterior

A: posterior tibia

B: navicular

Inn: tibial nerve

Action: plantar flexion