3Gluteus MaximusO: lower posterior iliac crest and posterior surface of the sacrumI: gluteal tuberosity (upper, posterior aspect of the femur) & I.T. bandActions:Extension of the hipExternal rotation of the hipLower fibers (below the center of motion) assist in adduction
5Gluteus MaximusProduces hip extension beyond 15 degrees; not used extensively during walkingStrongly used during running, hopping, skipping, and jumpingBest isolated with the knee flexed to reduce hip extension from the hamstrings40 degrees
6Gluteus Medius O: outer surface of the ilium just below the crest I: greater trochanterActions:Abduction of the hipAnterior fibers: Internal rotation,Posterior fibers: External rotation.
7Gluteus MinimusO: outer surface of the ilium beneath the gluteus mediusI: greater trochanter of the femurActionsAbduction of the hipInternal rotation
10Gluteus Medius and Minimus During walking these muscles abduct (or hold up) the free leg, preventing it from sagging.Both are important in transferring weight from one leg to the other (e.g. running, hopping, skipping, etc.)Their effectiveness decreases with age.
11Biceps Femoris Lateral side Origin: Insertion: Head of the fibula 1.) Long head - ischial tuberosity;2.) Short head - lower half of the linea asperaInsertion: Head of the fibulaAction:Extension of hipExternal rotation of the hip (and knee)(Flexion of knee)
12Biceps FemorisOne of the hamstring muscles (semitendinosus and semimembranosus)A two-joint muscle which is a powerful hip extensor unless the knees are flexedIsolated during leg curls with some external rotation of the hip and knee. This “lines up” the origin and insertion.
14Semitendinosus Medial side; superficial Origin: Ischial tuberosity Insertion: Medial surface of proximal end of the tibiaAction:Extension of the hipInternal rotation of the hip (and knee)Flexion of the knee
16Semimembranosus Medial side, deeper than semitendonosus Origin: Ischial tuberosityInsertion: Medial surface of the tibiaAction:Extension of the hipInternal rotation of the hip (and knee)Flexion of the knee
18Semitendinosus & Semimembranosus Two-joint musclesUsed in ordinary walking for hip extensionBest exercised with knee flexion exercises (leg curls) with the hip and knee internally rotatedHelp to medially stabilize knee
19Tensor Fasciae Latae O: iliac crest I: iliotibial (I.T.) band Actions: Flexion of the hipInternal rotationAbduction of the hip
20Tensor Fasciae Latae Prevents external rotation at the hip is flexed StretchingStrengthening
22Iliopsoas Origins: I: lesser trochanter of the femur Actions: iliac fossavertebral bodies of the last thorasic and lumbar vertebraeI: lesser trochanter of the femurActions:Flexion of the hipExternal rotation
23Iliopsoas Strong hip flexor muscle Raises legs off the floor from the supine position.Pulls anteriorly on the lower lumbar vertebraeMay aggravate lower back problemsAbdominal muscles can prevent lumbar strainUsed during complete sit-ups and straight leg sit-ups.Stretching this muscle requires hyper-extension of the hip.
24Pectineous O: pubic crest or ramus I: below the linea aspera Actions FlexionAdductionInternal rotation
28Adductor Longus Below the adductor brevis O: front of the pubis just below its crestI: middle third of the linea asperaActions:AdductionFlexion
29Adductor Magnus Located posterior to the longus O: edge of the pubic crest and ischial tuberosityI: linea asperaActions:AdductionExternal rotation
30Gracilis O: pubic crest I: medial condyle of tibia Actions: Adduction at the hipInternal rotation[Flexion at the knee]
31Adductor Muscles Adductor Brevis Adductor Longus Adductor Magnus GracilisNot heavily used in ordinary movementsHorse back riding, the breaststroke kick in swimming
32Sartorius Origin: Anterior-superior spine of the ilium Insertion: Anterior medial condyle of the tibia (behind the medial condyle)Action:Flexion of hipExternal rotation of the hip[Flexion of the knee]
34Sartorius Longest muscle in the body It is a two-joint muscle; hip flexion and knee flexionIt is weak when both actions take place at the same time.
35Rectus Femoris Two joint muscle; most superficial Origin: anterior-inferior iliac spine of the iliumInsertion: top of the patella and patellar ligament to the tibial tuberosityActions:Flexion of the hip [Extension of the knee]
36Rectus Femoris A two-joint muscle: hip flexion and knee extension Powerful knee extension when the hip is extended but weaker when the hip is flexed.The gluteus maximus and the hamstring muscles will extend the hip making the rectus femoris stronger during knee extension
41Six Hip Rotator Muscles Common action is External RotationPowerful external rotation of the hip is required to throw a baseball, swing a bat or golf club.The sciatic nerve passes just inferior to the piriformis therefore a tight piriformis muscle my contribute to compression on the sciatic nerve.
54Name the muscle Gluteus Maximus Actions: extension of the thigh at the hiplateral rotation of the thighlower fibers (below the center of motion) assist adductionupper fibers (above the center of motion) assist in abductionGluteus Maximus
55Name the muscle Actions adduction of the thigh at the hip aids in flexionAdductor Brevis
56Name the muscle Actions Gluteus Minimus abduction of the thigh medial rotationflexionGluteus Minimus
57Name the muscle Actions: Adductor Longus adduction of the thigh assists in flexion of the thigh at the hipAdductor Longus
58Name the muscle Actions: abduction of the thigh anterior fibers: flexion and medial rotation,posterior fibers: extension and lateral rotation.Gluetus Medius
59Name the muscle Actions: adduction at the hip medial rotation [flexion at the knee]Gracilis
60Name the muscle Iliopsoas Actions: flexion of the thigh at the hip slight adductionflexion of the spine
61Name the muscleActionsflexion of the hipadductionPectineus
62Name the muscle Actions: flexion of the thigh at the hip medial rotationabduction of the thigh, medial rotation (weak)Tensor Fasciae Latae
63Name the muscle Actions: adduction of the thigh at the hip flexion (anterior fibers)extension (posterior fibers)Adductor Magnus
64What is the most anterior hip rotator muscle? Obturator Externus
65What is the common action of these muscles? PiriformisGemellus superiorObturator internusGemellus inferiorQuadratus femorisExternal Rotation
66Name the muscle Deep muscle Action: Extension of the hip Flexion of the kneeInternal rotation of the hip (and knee)Semimembranosus
67Name the muscle Superficial muscle Action: Extension of the hip Flexion of the kneeInternal rotation of the hip (and knee)Semitendonosis
68Name the muscle Action: Sartorius Flexion of hip External rotation of the hip[Flexion of the knee]Sartorius
69Name the muscle Actions: Rectus Femoris Flexion of the hip [Extension of the knee]Rectus Femoris
70Name the muscle Action: Extension of hip Flexion of knee Lateral rotation of the hip (and knee)Biceps Femoris