Muscles of thigh and gluteal region Flashcards by Breea Buckley

Pectineus- attachments

Superior ramus pubis

Pectineal line of femur

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Pectineus- action

Adducts, flexes, and medially rotates thigh

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Pectineus- innervation

Femoral n. (L2-L3)

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Sartorius- attachments

Anterior superior iliac spine

Inferior to medial condyle of tibia via the pes anserinus (common tendon of gracilis, sartorius, & semitendinosus m.)

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Sartorius- action

Abducts, flexes, and laterally rotates thigh

Flexes and medially rotates leg

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Sartorius- innervation

Femoral n. (L2-L3)

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Rectus femoris- attachments

Anterior inferior iliac spine

Patellar (quadriceps) tendon to patella to patellar ligament to tibial tuberosity

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Rectus femoris- action

Flexes thigh, extends leg

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Rectus femoris- innervation

Femoral n. (L2-L4)

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Vastus lateralis- attachments

Greater trochanter of femur, linea aspera of femur
Patellar tendon to patella to patellar ligament to tibial tuberosity, lateral patellar retinaculum to lateral patella and lateral condyle of tibia

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Vastus lateralis- action

Extends leg

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Vastus lateralis- innervation

Femoral n. (L2-L4)

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Vastus medialis- attachments

Intertrochanteric line of femur, linea aspera of femur
Patellar tendon to patella to patellar ligament to tibial tuberosity, medial patellar retinaculum to medial patella and medial condyle of tibia

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Vastus medials- action

Extends leg

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Vastus medialis- innervation

Femoral n. (L2-L4)

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Vastus intermedius- attachments

Anterior surface of femur

Patellar tendon to patella to patellar ligament to tibial tuberosity

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Vastus intermedius- action

Extends leg

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Vastus intermedius- innervation

Femoral n. (L2-L4)

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Adductor longus- attachments

Body of pubis

Linea aspera of femur

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Adductor longus - action

Adducts & flexes thigh

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Adductor longus- innervation

Obturator n. (L2-L4)

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Adductor brevis- attachments

Body & inferior ramus of pubis

Pectineal line of femur, linea aspera of femur

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Adductor brevis- action

Adducts & flexes thigh

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Adductor brevis- innervation

Obturator n. (L2-L4)

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Adductor magnus (adductor part)- attachment

Adductor part: ischiopubic ramus (ramus of ischium + inferior ramus of pubis) Adductor part: gluteal tuberosity, linea aspera, & medial supracondylar line of femur

Adductor magnus (adductor part)- action

Adducts thigh, adductor part: flexes thigh

Adductor magnus (adductor part)- innervation

Adductor part: obturator n. (L2-L4)

Adductor magnus (hamstring part)- attachment

Ischial tuberosity | Adductor tubercle of femur

Adductor magnus (hamstring part)- action

Adducts thigh | Hamstring part: extends thigh or trunk

Adductor magnus (hamstring part)- Innervation

Tibial n. (L4)

Gracilis- attachments

Body and inferior ramus of pubis | Inferior to medial condyle of tibia via the pes anserinus

Gracilis- action

Adducts thigh | Flexes & medially rotates leg

Gracilis- innervation

Obturator n. (L2-L3)

Obturator externus- attachments

Margins of obturator foramen externally External surface of obturator membrane (covers obturator foramen) Trochanteric fossa of femur

Obturator externus- action

Laterally rotates thigh

Obturator externus- innervation

Obturator n. (L3-L4)

Gluteus maximus- attachments

Ilium posterior to gluteal line, posterior surface of sacrum and coccyx, sacrotuberous ligament Iliotibial tract to anterolateral (Gerdy's) tubercle of tibia, gluteal tuberosity of femur

Gluteus maximus- action

Extends and laterally rotates thigh, extends trunk

Gluteus maximus- innervation

Inferior gluteal n. (L5-S2)

Gluteus medius- attachments

Ilium between anterior and posterior gluteal lines | Greater trochanter of femur

Gluteus medius- action

Abducts and medially rotates thigh | Keeps pelvis level when standing on one leg

Gluteus medius- innervation

Superior gluteal n. (L5-S1)

Gluteus minimus- attachment

Ilium between anterior and inferior gluteal line | Greater trochanter of femur

Gluteus minimus- action

Abducts and medially rotates thigh | Keeps pelvis level when standing on one leg

Gluteus minimus- innervation

Superior gluteal n. (L5-S1)

Tensor of fascia lata- attachment

ASIS, iliac crest | IT tract to anterolateral (Gerdy's) tubercle of tibia

Tensor of fascia lata- action

Abducts and medially rotates thigh | Keeps pelvis level when standing on one leg

Tensor of fascia lata- innervation

Superior gluteal n. (L5-S1)

Piriformis- attachment

Anterior surface of sacrum | Greater trochanter of femur

Piriformis- action

Laterally rotates an extended thigh | Abducts a flexed thigh

Piriformis- innervation

Branches of anterior rami of S1-S2

Obturator internus- attachment

Internal surface of obturator membrane, internal margin of obturator foramen Greater trochanter of femur

Obturator internus- action

Laterally rotates an extended thigh | Abducts a flexed thigh

Obturator internus- innervation

N. to obturator internus (L5-S1)

Superior gemellus- attachment

Ischial spine | Greater trochanter of femur

Superior gemellus- action

Laterally rotates and extended thigh | Abducts a flexed thigh

Superior gemellus- innervation

N. to obturator internus (L5-S1)

Inferior gemellus- attachment

Ischial tuberosity | Greater trochanter of femur

Inferior gemellus- action

Laterally rotates an extended thigh | Abducts a flexed thigh

Inferior gemellus- innervation

N. to quadratus femoris (L5-S1)

Quadratus femoris- attachment

Ischial tuberosity | Intertrochanteric crest of femur

Quadratus femoris- action

Laterally rotates thigh

Quadratus femoris- innervation

N. to quadratus femoris (L5-S1)

Semitendinosus- attachment

Ischial tuberosity | Inferior to medial condyle of tibia via pes anserinus

Semitendinosus- action

Extends thigh or trunk | Flexes and rotates leg medially

Semitendinosus- innervation

Tibial n. (L5-S2)

Semimembranosus- attachment

Ischial tuberosity | Medial condyle of tibia

Semimembranosus- action

Extends thigh or trunk | Flexes and medially rotates leg

Semimembranosus- innervation

Tibail n. (L5-S2)

Biceps femoris- attachment

Long head: Ischial tuberosity Short head: Linea aspera of femur and lateral supracondylar line of femur Head of fibula

Biceps femoris- action

Long head only: extends thigh or trunk | Both heads: Flex and rotate leg laterally

Biceps femoris- innervation

Long head: tibial n. (L5-S2) | Short head: common fibular n. (L5-S2)