O&I
Psoas major/minor:
O&I
Innervation
Action
O: Lumbar vertebrae, bodies of IV discs, lumbar transverse processes
I: Lesser trochanter
Innervation: Ventral rami
Action: hip flexion, (psoas minor) assists in posterior pelvic tilt
What nerve innervates the adductor muscles?
Obturator nerve EXCEPT
Pectineus: can be Femoral or Obturator or Both
Adductor Magnus: Obturator and Tibial part of Sciatic nerve
What are the muscles included in the anterior compartment of the lower leg?
Which nerve innervates these muscles?
Superficial: Tibialis anterior, Extensor hallucis longus, Extensor digitorum longus, Peroneus tertius
Deep: Extensor hallucis brevis, Extensor digitorum brevis
Innervation: Deep peroneal nerve
What are the actions of extensor hallucis longus and extensor digitorum longus?
Extensor hallucis longus: DF, extend big toe
Extensor digitorum longus: DF extend toes, forefoot eversion
What nerve innervates the gluteus maximus?
Inferior gluteal nerve
Iliacus:
O&I
Innervation
Action
O: Iliac fossa
I: Lesser trochanter
Innervation: Femoral nerve
Action: flexes hip
What action's do the pectineus, adductor longus and adductor brevis perform?
Adduction of the hip
Flexion of the hip
O&I:
Tibialis Anterior
Extensor Hallucis Longus
Extensor Digitorum Longus
Peroneus tertius
Tibialis Anterior:
-O: upper 2/3 tibia
-I: medial cuneiform, base of 1st metatarsal
Extensor Hallucis Longus:
-O: Lower fibula, interosseous membrane
-I: base of distal phalanx of big toe
Extensor Digitorum Longus
-O: lateral condyle of tibia, upper fibula, interosseous membrane
-I: base of distal phalanx of 4 lateral toes
Peroneus Tertius:
-O: continues with extensor digitorum longus
-I: base of 5th metatarsal
What is the O&I, Innervation and Action of posterior tibialis?
O: Tibia, fibula, interosseous membrane
I: navicular tuberosity, all cuneiforms, cuboid, 2nd, 3rd and 4ths metatarsals
Innervation: Tibial nerve
Action: PF and inversion, supports medial arch
What nerve innervates gluteus medius, gluteus minimus and TFL?
Superior gluteal nerve
Sartorius
O&I
Innervation
Actions
O: ASIS
I: pes anserine- upper medial surface of tibia
Innervation: Femoral nerve
Action: hip flexion, ER, knee flexion
Which muscle of the adductor group is also an external rotator of the hip?
Obturator Externus
What muscles are in the lateral compartment of the leg, name O&I, Innervation and Action's.
Peroneus longus
O: head of fibula, upper fibula
I: medial cuneiform, base of 1st metatarsal
Peroneus brevis
O: lower fibula
I: tuberosity of 5th metatarsal
Innervation: Superficial peroneal nerve
Action: Eversion and PF
Which muscles are innervated by the medial plantar nerve?
Adductor hallucis, Flexor digitorum brevis, Abductor digiti minimi & 1st lumbrical
Name the O&I for gluteus medius muscle and its actions.
O: Ilium between anterior and posterior gluteal lines
I: greater trochanter
Action: Hip abduction, Hip IR (anterior fibers), Hip ER (posterior fibers)
Quadriceps muscle group:
Rectus femoris O
Vastus Lateralis O
Vastus Medialis O
Vastus Intermedius O
Common Insertion
Innervation
Action
Rectus Femoris O: AIIS, Ilium above acetabulum
Vastus Lateralis: Lateral lip of linea aspera, lateral intermuscular septum
Vastus Medialis: Lower anterior part of intertrochanteric line, medial lip linea aspera
Vastus Intermedius: anterior and lateral surface of body of femur
Common Insertion: quadriceps tendon (upper border of patella)
Innervation: femoral nerve
Action: extends knee, (Rectus femoris) flexes the hip as well
Which muscle of the Adductor group adducts the hip, flexes the hip and flexes the knee?
Gracilis
What is the action of tibialis anterior?
DF and inversion
What are the 5 external rotators of the hip?
Piriformis, Obturator internus, Superior gemelli, Inferior gemelli, Quadratus femoris
Name the TFL O&I and actions.
O: Anterior part of iliac crest, ASIS
I: IT band which attaches to Gerdy's tubercle on tibia, patellar retinaculum
Action: hip flexion, knee extension
Adductor Muscles O&I (6 muscles)
Pectineus:
- O: pectineal line of pubis
- I: below lesser trochanter
Adductor Brevis:
- O: body of pubis, inferior ramus of pubis
- I: upper part of linea aspera, medial lip
Adductor Magnus
- O: Inferior ramus, body of pubis, ischium, ischial tuberosity
- I: Medial lip linea aspera, adductor tubercle
Adductor longus
- O: Body of pubis
- I: linea aspera, medial lip
Obturator Externus
- O: external surface of obturator membrane
- I: trochanteric fossa
Gracilis
- O: body of pubis, inferior ramus of pubis
- I: pes anserine
What is are the actions of Adductor Magnus?
Adducts and flexes the hip
Ischial fibers can EXTEND the hip as well
What is the action of peroneus tertius?
DF and eversion
What is the O&I, Innervation and Action's of Piriformis?
O: Pelvic surface of sacrum
I: Greater trochanter
Innervation: S1 and S2 in pelvis
Action: Hip ER
Name O&I, Innervation and action of the biceps femoris.
O: Long head- ischial tuberosity, Short head- lateral lip linea aspera
I: head of fibula, lateral tibial condyle
Innervation: Long head- tibial part of sciatic, Short head- common peroneal nerve
Action: flexes the knee, long head extends the hip, STRONG ER of the knee and hip