Thigh Muscles Flashcards
Anterior Thigh muscles
Quads, Sartorius, articularis genu
Rectus femoris O and I
O: AIIS (straight tendon) and groove above acetabulum
I: base of patella
Rectus femoris function
knee extension and hip flexion
Anterior compartment N and Artery
Femoral N, femoral A
Vastus lateralis O and I
O: lateral lip of linea aspera, lateral lip of gluteal tuberosity, anterior and inferior boarders of greater trochanter, proximal intertrochanteric line
I: lateral border of patella
Vastus medialis O and I
O: medial lip of linea aspera, tendon of adductor longus/magnus, medial IM septum, proximal suprachondylar line, distal intertrochanteric line
I: medial border of patella
Vastus Intermedius O and I
O: proximal 2/3 of anterior and lateral surface of femur
I: base of patella
Sartorius O and I and function
O: ASIS
I: medial tibia (part of pos anserinus)
F: hackisack motion
Articularis genu O, I and function
O: anterior surface of distal femur
I: synovial membrane and supra patellar bursa
F: draws synovium proximally during knee flexion
Medial Compartment Muscles
gracilis, obturator externus, pectineus, adductor brevis, adductor longus, adductor magnus
Medial compartment A and N
A: medial circumflex, profunda femoris, obturator arteries
N: Obturator N
Gracilis O and I
O: inferior 1/2 of pubic symphysis, pubic body, superior 1/2 of inferior pubic rams
I: medial tibia (pes anserinus)
Gracilis Function
thigh adduction and medial rotation, knee flexion
Obturator externus O and I
O: external aspect of ischial and pubic rami, along margins of obturator foramen
I: trochanteric fossa
Pectineus O and I
O: pectin pubis and bone anterior to pectin pubis between pubic tubercle and iliopectineal line
I: Pectineal line of femur
Pectineus function
thigh adduction, flexion and medial rotation
Adductor brevis O and I
O: pubic body, inferior pubic ramus
I: Proximal linea aspera
Adductor longus O and I
O: anterior surface of pubic body
I: Medial lip of linea aspera, between vastus medals and adductor magnus
Adductor Magnus adductor portion O and I
O: inferior pubic ramus, ischial tuberosity
I: gluteal tuberosity, linea aspera
Adductor Magnus hamstring portion O and I
O: ischial tuberosity (triangular region)
I: medial supracondylar line and adductor tubercle
Adductor Magnus hamstring portion F and N
F: thigh extension
A: sciatic N (tibial portion)
Posterior compartment muscles
Biceps femoris, semimembranosus, semitendonosus
Biceps femoris short head O and I
O: lateral lip of linea aspera, lateral supracondylar line, lateral IM septum
I: lateral styloid process of fibula and lateral condyle of fibula
Biceps femoris short head N and F
F: knee flexion and lateral rotation when flexed
N: Sciatic N (common fibular portion)
Biceps femoris long head O and I
O: ischial tuberosity and sacrotuberous ligament
I: lateral styloid process of fibula and lateral condyle of tibia
Biceps femoris long head N and F
N: sciatic N (tibial portion)
F: thigh extension and lateral rotation, knee flexion and lateral rotation when flexed
Semimembranosus O and I
O: ischial tuberosity (upper, lateral portion of oblique line above semitendonosus and long head of biceps)
I: Medial condyle of tibia and lateral condyle of femur as oblique popliteal ligament
Semimembranosus F and N
F: hip extension, knee flexion, medial rotation of tibia when knee flexed
N: sciatic N (tibial portion)
Semitendonosus O and I
O: Ischial tuberosity (below the oblique line via common tendon with biceps long head)
I: medial tibia (pes anserinus)
Semitendonosus F and N
F: hip extension, knee flexion, medial rotation of tibia when knee flexed
N: sciatic N (tibial portion)
Superolateral border of popliteal fossa
biceps femoris M
Superomedial border of popliteal fossa
semimembranosus
Inferolateral border of popliteal fossa
gastroc lateral head
inferomedial border of popliteal fossa
gastroc medial head
Contents of popliteal fossa
popliteal A and V-genicular branches
Sciatic N divisions: tibial and superficial peroneal N
Plantaris and popliteus M
