Muscle Innervations, Actions, Insertions, and Origins Flashcards
Sartorius Muscle
Innervation: Femoral Nerve
Origin: Anterior Superior Iliac Spine (ASIS)
Insertion: Medial Shaft of Tibia
Action: Flexes, ABDucts, medially rotates thigh
Iliac Muscle
Innervation: Femoral Nerve
Origin: Iliac Fossa
Insertion: Lesser Trochanter
Action: flexes thigh
Psoas Major Muscle
Innervation: femoral nerve
Origin: transverse process and intervertebral disks of T12-L5
Insertion: Lesser trochanter
Action: flexes thigh
Pectineus Muscle
Innervation: Femoral Nerve
Origin: Pectin Pubis of Superior Ramus of Pubis
Insertion: below the lesser trochanter
Action: flex and adduct thigh
Rectus Femoris Muscle
Innervation: Femoral Nerve
Origin: Anterior inferior Iliac Spine
Insertion: quadriceps tendon into patella
Action: flexes thigh, extends knee
Vastus Lateralis Muscle
Innervation: femoral nerve
Origin: upper end of femur, upper half linea aspera, lateral intermuscular septum
Insertion: quadriceps tendon into patella
Action: extends leg
Vastus Medialis Muscle
Innervation: femoral Nerve
Origin: upper end of femur, linea aspera, medial supracondylar line, medial intermuscular septum
Insertion: quadriceps tendon into patella
Action: extension of leg
Vastus Intermedialis Muscle
Innervation: Femoral Nerve
Origin: upper femur, anterior and lateral surface of femur shaft
Insertion: quadriceps tendon into patella
Action: extension of leg at knee joint, articulates genuine retracts synovial membrane during knee motion
Gluteus Maximus Muscle
Innervation: inferior gluteal nerve
Origin: ilium behind posterior gluteal line, Sarum, coccyx, sacrotuberous ligament
Insertion: iliotibial tract and gluteal tuberosity of femur
Action: extension thigh, laterally rotates thigh, extends knee
Gluteus Medius Muscle
Innervation: superior gluteal nerve
Origin: ilium between posterior and anterior gluteal line
Insertion: greater trochanter
Action: abducts thigh, tilts pelvis when walking, medially rotate thigh
Gluteus Minimus Muscle
Innervation:superior gluteal nerve
Origin: ilium between anterior and inferior gluteal line
Insertion: greater trochanter
Action: abducts thigh, tilts pelvis when walking, medially rotate thigh
Tensor Fasciae Latae Muscle
Innervation: superior gluteal nerve
Origin: iliac crest
Insertion: iliotibial tract
Action: flex thigh, abduct thigh, extend knee
Piriformis
Innervation: Nerve to piriformis
Origin: sacrum
Insertion: greater trochanter
Action: lateral rotates thigh
Obturator Internus
Innervation: nerve to obturator internus
Origin:obturator membrane and obturator foramen
Insertion: greater trochanter
Action: lateral rotator of thigh
Gemellus Superior
Innervation: nerve to obturator internus
Origin: spine of ischium
Insertion: blends with tendon of obturator internus
Action: lateral rotator of thigh
Gemellus Inferior
Innervation: nerve to quadratus femoris
Origin: ischial tuberosity
Insertion: blends with tendon of obturator internus
Action: lateral rotator of thigh
Quadratus Femoris
Innervation: nerve to quadratus femoris
Origin: ischial tuberosity
Insertion: intertrochanteric crest and quadrate tubercle of femur
Action: lateral rotator of thigh
Gracilis
Innervation: anterior division of obturator nerve
Origin:ramus of pubis, ramus of ischium
Insertion: upper tibia shaft between sartorial and semitendinosis
Action: adducts thigh, flex leg, rotate tibia medially
Adductor Longus
Innervation: anterior division of obturator nerve
Origin: body of pubis between pubic crest and symphysis
Insertion: medial lip of linea aspera
Action: adducts thigh, assists in medial rotation
Adductor Brevis
Innervation: anterior division of obturator nerve
Origin: body and inferior ramus of pubis
Insertion: upper half of linea aspera
Action: adducts thigh, assists in medial rotation
Adductor Magnus
Innervation: adductor portion- posterior division of obturator nerve; hamstring portion- tibial nerve
Origin: inferior ramus of pubis, ramus of ischium, ischial tuberosity,
Insertion: posterior surface of femur, adductor tubercle
Action: adducts thigh, medially rotates thigh, extend thigh
Obturator Externus
Innervation: posterior division of obturator nerve
Origin: obturator membrane
Insertion: trochanteric fossa
Action: laterally rotates thigh
