ADDUCTOR MAGNUS• Origin:

– anterior fibers: inferior pubic ramus – oblique fibers: ischial ramus – posterior fibers: ischial tuberosity

• Insertion: – proximal 1/3 of linea aspera – adductor tubercle

• Action: – adducts the thigh – posterior fibers also extend and laterally rotate thigh

• Blood: – muscular branches of profunda femoris

• Nerve: – anterior fibers: obturator nerve, L2,3,4 – posterior fibers: tibial nerve of sciatic bundle, L4,5

Actions•Adduction of the thigh atthe hip joint•Extension of the thigh atthe hip joint•Posterior tilt of thepelvis at the hip joint•Elevation of the pelvisat the hip jointInnervationThe obturator nerve andthe sciatic nerveArterial Supply•Anterior head: thefemoral artery and thedeep femoral artery•Posterior head: the deepfemoral artery and theinferior gluteal artery

Concetta Langford - Anatomy - 2/22/11

ADDUCTOR MAGNUS (cont’d)

Concetta Langford - Anatomy - 2/22/11

GRACILIS• Origin: body of pubis & inferior

pubic ramus • Insertion:

– medial surface of proximal tibia, inferior to tibial condyle

– contributes to the pez anserine• Action:

– adducts thigh – flexes knee – medially rotates tibia

• Blood: obturator artery • Nerve: obturator nerve, L2,3,4

Actions•Adduction of the thigh atthe hip joint•Flexion of the thigh atthe hip joint•Flexion of the leg at theknee joint•Anterior tilt of the pelvisat the hip joint•Medial rotation of theleg at the knee joint•Elevation of the pelvis atthe hip jointInnervationThe obturator nerveArterial SupplyThe deep femoral artery

Concetta Langford - Anatomy - 2/22/11

Gracilis (cont’d)

Concetta Langford - Anatomy - 2/22/11

OBTURATOR EXTERNUS• Origin:

– medial surface of obturator foramen

– external surface of obturator membrane

• Insertion: trochanteric fossa of femur

• Action: – laterally rotates thigh – assists in flexion of hip joint

• Blood: obturator artery • Nerve: obturator nerve,

L2,3,4

Actions•Lateral rotation of the thigh at the hip joint•Contralateral rotation ofthe pelvis at the hip jointInnervationThe obturator nerveArterial SupplyThe obturator artery

Concetta Langford - Anatomy - 2/22/11

OBTURATOR EXTERNUS (cont’d)

Concetta Langford - Anatomy - 2/22/11

SARTORIUS• Origin: anterior superior iliac spine

(ASIS) • Insertion:

– upper medial surface of body of tibia – contributes to pez anserine

• Action: – flexes hip and knee – laterally rotates thigh if flexed at the

hip• Blood:

– muscular branches of profunda femoris artery

– saphenous branch of descending genicular artery

• Nerve: branches of femoral nerve, L2,3

DID YOU KNOW?•The sartorius is the longest muscle in the human body.• It is also one of threemuscles that attach into the pes anserine tendon.

Concetta Langford - Anatomy - 2/22/11

SARTORIUS (cont’d)

Concetta Langford - Anatomy - 2/22/11

RECTUS FEMORIS• Origin:

– anterior head: anterior inferior iliac spine (AIIS)

– posterior head: ilium just above the acetabulum

• Insertion: – common quadriceps tendon into patella – tibial tuberosity via patellar ligament

• Action: – extends knee – flexes hip

• Blood: lateral femoral circumflex artery • Nerve: branches of femoral nerve,

[L2],3,4

Actions•Extension of the leg at the knee joint•Flexion of the thigh at the hip joint•Anterior tilt of the pelvisat the hip joint InnervationThe femoral nerveArterial SupplyThe femoral artery and the deep femoral artery

Concetta Langford - Anatomy - 2/22/11

RECTUS FEMORIS (cont’d)

Concetta Langford - Anatomy - 2/22/11