Muscles LL Flashcards
Compartment, Action, Innervation
Iliopsoas: psoas major
Iliopsoas: psoas major
Compartment
Anterior thigh
Action
Flexes thigh
Innervation
Branches of Lumbar Plexus (L2 - L3)
Proximal Attachment
Transverse processes and bodies of T12 - L5 vertebrae
Distal Attachment
Lesser trochanter of femur with iliacus
Compartment, Action, Innervation
Iliopsoas: iliacus
Iliopsoas: iliacus
Compartment
Anterior thigh
Action
Flexes thigh
Innervation
Femoral n.
Proximal Attachment
Iliac fossa
Distal Attachment
Lesser trochanter of femur with psoas major
Compartment, Action, Innervation
Sartorius
Sartorius
Compartment
Anterior thigh
Action
Flexes thigh and laterally rotates thigh; flexes leg and medially rotates leg
Innervation
Femoral n.
Proximal Attachment
Anterior superior iliac spine
Distal Attachment
Tibial tuberosity, medial side
Compartment, Action, Innervation
Rectus femoris
Rectus femoris
Compartment
Anterior thigh
Action
Flexes thigh; extends leg
Innervation
Femoral n.
Proximal Attachment
Anterior inferior iliac spine
Distal Attachment
Quadriceps tendon to patella and then patellar ligament to tibial tuberosity
Compartment, Action, Innervation
Adductor longus
Adductor longus
Compartment
Medial thigh
Action
Adducts thigh; flexes thigh
Innervation
Obturator n.
Proximal Attachment
Pubis near pubic symphysis
Distal Attachment
Linea aspera of femur
Compartment, Action, Innervation
Adductor brevis
Adductor brevis
Compartment
Medial thigh
Action
Adducts thigh; flexes thigh
Innervation
Obturator n.
Proximal Attachment
Inferior ramus and body of pubis
Distal Attachment
Upper third of linea aspera of femur
Compartment, Action, Innervation
Gracilis
Gracilis
Compartment
Medial thigh
Action
Adducts and flexes thigh; flexes leg
Innervation
Obturator n.
Proximal Attachment
Inferior ramus and body of pubis
Distal Attachment
Upper medial surface of tibia
Compartment, Action, Innervation
Pectineus
Pectineus
Compartment
Medial thigh
Action
Flexes thigh; adducts thigh
Innervation
Femoral n. or Obturator n.
Proximal Attachment
Pectineal line of pubis
Distal Attachment
Pectineal line of femur
Compartment, Action, Innervation
Adductor magnus: Adductor portion
Adductor magnus: Adductor portion
Compartment
Medial thigh
Action
Adducts and flexes thigh
Innervation
Obturator n.
Proximal Attachment
Inferior ramus of pubis and ischial tuberosity
Distal Attachment
Adductor tubercle of femur
Compartment, Action, Innervation
Adductor magnus: Hamstring portion
Adductor magnus: Hamstring portion
Compartment
Posterior thigh
Action
Adducts thigh, extends and laterally rotates thigh
Innervation
Obturator n.
Proximal Attachment
Inferior ramus of pubis and ischial tuberosity
Distal Attachment
Linea Aspera of femur
Compartment, Action, Innervation
Tensor of Fasciae Latae
Tensor of Fasciae Latae
Compartment
Gluteal thigh
Action
Abducts thigh; medially rotates thigh
Innervation
Superior Gluteal n.
Proximal Attachment
Iliac crest and lateral surface of anterior superior iliac spine
Distal Attachment
Iliotibial band
Compartment, Action, Innervation
Gluteus maximus
Gluteus maximus
Compartment
Gluteal thigh
Action
Extends thigh; laterally rotates thigh
Innervation
Inferior Gluteal n.
Proximal Attachment
Iliac crest, sacrum, coccyx
Distal Attachment
Iliotibial tract of fascia lata; linea aspera and gluteal tuberosity of femur
Compartment, Action, Innervation
Gluteus medius
Gluteus medius
Compartment
Gluteal thigh
Action
Abducts thigh; medially rotates thigh
Innervation
Superior gluteal nerve (L4 - S1)
Proximal Attachment
Posterior iliac crest; lateral surface between posterior and anterior gluteal lines
Distal Attachment
Greater trochanter of femur
Compartment, Action, Innervation
Gluteus minimus
Gluteus minimus
Compartment
Gluteal thigh
Action
Abducts thigh; medially rotates thigh
Innervation
Superior Gluteal n. (L4 - S1)
Proximal Attachment
Lateral surface of ilium between inferior and anterior gluteal lines
Distal Attachment
Greater trochanter of femur
Compartment, Action, Innervation
Piriformis
Piriformis
Compartment
Gluteal thigh
Action
Laterally rotates thigh
Innervation
Nerve to Piriformis
Proximal Attachment
Anterolateral surface of sacrum
Distal Attachment
Greater trochanter
Compartment, Action, Innervation
Biceps femoris: long head
Biceps femoris: long head
Compartment
Posterior thigh
Action
Extends thigh, flexes leg, laterally rotates leg
Innervation
Tibial division of Sciatic n.
Proximal Attachment
Ischial tuberosity
Distal Attachment
Head of fibula
Compartment, Action, Innervation
Biceps femoris: short head
Biceps femoris: short head
Compartment
Posterior thigh
Action
Flexes leg, laterally rotates leg
Innervation
Common Fibular division of Sciatic n.
Proximal Attachment
Linea aspera of femur
Distal Attachment
Head of fibula
Compartment, Action, Innervation
Semimembranosus
Semimembranosus
Compartment
Posterior thigh
Action
Extends thigh and flexes leg; medially rotates leg
Innervation
Tibial division of Sciatic n.
Proximal Attachment
Ischial tuberosity
Distal Attachment
Posterior surface of medial condyle of tibia
Compartment, Action, Innervation
Semitendonosus
Semitendonosus
Compartment
Posterior thigh
Action
Extends thigh and flexes leg; medially rotates leg
Innervation
Tibial division of Sciatic n.
Proximal Attachment
Ischial tuberosity
Distal Attachment
Proximal medial surface of tibia
Compartment, Action, Innervation
Vastus Intermedius
Vastus Intermedius
Compartment
Anterior thigh
Action
Extends leg
Innervation
Femoral n.
Proximal Attachment
Anteriolateral surface of femur
Distal Attachment
Quadriceps tendon to patella and then patellar ligament to tibial tuberosity
Compartment, Action, Innervation
Vastus Lateralis
Vastus Lateralis
Compartment
Anterior thigh
Action
Extends leg
Innervation
Femoral n.
Proximal Attachment
Greater trochanter and linea aspera
Distal Attachment
Quadriceps tendon to patella and then patellar ligament to tibial tuberosity
Compartment, Action, Innervation
Vastus Medialis
Vastus Medialis
Compartment
Anterior thigh
Action
Extends leg
Innervation
Femoral n.
Proximal Attachment
Intertrochanteric line and linea aspera of the femur
Distal Attachment
Quadriceps tendon to patella and then patellar ligament to tibial tuberosity
Compartment, Action, Innervation
Fibularis tertius
Fibularis tertius
Compartment
Anterior leg
Action
Dorsiflexes and weak evertor of foot
Innervation
Deep Fibular n.
Proximal Attachment
Anterior distal surface of fibula; interosseous membrane
Distal Attachment
Base of metatarsal V
Compartment, Action, Innervation
Tibialis anterior
Tibialis anterior
Compartment
Anterior leg
Action
Dorsiflexes foot; inverts foot
Innervation
Deep Fibular n.
Proximal Attachment
Lateral condyle and proximal shaft of tibia; interosseous membrane
Distal Attachment
Metatarsal I and first (medial) cuneiform
Compartment, Action, Innervation
Fibularis longus
Fibularis longus
Compartment
Lateral leg
Action
Everts foot; weak plantar flexor
Innervation
Superficial Fibular n.
Proximal Attachment
Head and upper 2/3 of shaft fibula; lateral condyle of tibia
Distal Attachment
Base of metatarsal I; medial cuneiform
Compartment, Action, Innervation
Fibularis brevis
Fibularis brevis
Compartment
Lateral leg
Action
Everts foot; weak plantar flexor
Innervation
Superficial Fibular n.
Proximal Attachment
Midlateral shaft of fibula
Distal Attachment
Base of metatarsal V
Compartment, Action, Innervation
Gastrocnemius
Gastrocnemius
Compartment
Posterior/Superficial leg
Action
Flexes leg; plantar flexes foot
Innervation
Tibial n.
Proximal Attachment
Superior and posteiror surfaces of lateral and medial condyles of femur
Distal Attachment
Calcaneus (via calcaneal tendon)
Compartment, Action, Innervation
Soleus
Soleus
Compartment
Posterior/Superficial leg
Action
Plantar flexes foot
Innervation
Tibial n.
Proximal Attachment
Head and proximal shaft of fibula; medial border of tibia
Distal Attachment
Calcaneus (via calcaneal tendon)
Compartment, Action, Innervation
Flexor digitorum longus
Flexor digitorum longus
Compartment
Posterior/Deep leg
Action
Plantar flexes foot; flexes MP, PIP and DIP joints of toes 2-5
Innervation
Tibial n.
Proximal Attachment
Posteromedial surface of tibia
Distal Attachment
Distal phalanges of toes 2-5
Compartment, Action, Innervation
Flexor hallucis longus
Flexor hallucis longus
Compartment
Posterior/Deep leg
Action
Plantar flexes foot; flexes MP, PIP and DIP joints of great toe (1)
Innervation
Tibial n.
Proximal Attachment
Posterior lower 2/3 of fibula
Distal Attachment
Distal phalanx of great toe (1)
Compartment, Action, Innervation
Tibialis posterior
Tibialis posterior
Compartment
Posterior/Deep leg
Action
Plantar flexes foot; inverts foot
Innervation
Tibial n.
Proximal Attachment
Fibula, tibia and interosseous membrane
Distal Attachment
Metatarsals II-IV; navicular bone; cuboid bone; all cuneiforms
Compartment, Action, Innervation
Extensor digitorum brevis
Extensor digitorum brevis
Compartment
Foot (dorsal)
Action
Extends MP and PIP joints of toes 2-4
Innervation
Deep Fibular n.
Proximal Attachment
Calcaneus and inferior extensor retinaculum
Distal Attachment
Proximal phalanges of toes 2-4
Compartment, Action, Innervation
Extensor hallucis brevis
Extensor hallucis brevis
Compartment
Foot (dorsal)
Action
Extends MP joint of great toe (1)
Innervation
Deep Fibular n.
Proximal Attachment
Calcaneus and inferior extensor retinaculum
Distal Attachment
Proximal phalanx of great toe (1)
Compartment, Action, Innervation
Flexor digitorum brevis
Flexor digitorum brevis
Compartment
Foot (plantar 1)
Action
Felxes MP and PIP joints of toes 2-5
Innervation
Medial Plantar n.
Proximal Attachment
Calcaneus
Distal Attachment
Middle phalanges of toes 2-5
Compartment, Action, Innervation
Lumbricals
Lumbricals
Compartment
Foot (plantar 2)
Action
Flexes MP joints and extends PIP and DIP joints of toes 2-5
Innervation
Medial Plantar n. (1st lumbrical); Lateral Plantar n. (lumbricals 2-4)
Proximal Attachment
Tendons of flexor digitorum longus
Distal Attachment
Tendons of extensor digitorum longus
Compartment, Action, Innervation
Extensor digitorum longus
Extensor digitorum longus
Compartment
Anterior leg
Action
Extends toes 2-5; dorsiflexes foot
Innervation
Deep Fibular n.
Proximal Attachment
Lateral condyle of tibia; anterior surface of fibula; interosseous membrane
Distal Attachment
Distal phalanges of toes 2-5
Compartment, Action, Innervation
Extensor hallucis longus
Extensor hallucis longus
Compartment
Anterior leg
Action
Extends great toe (1); dorsiflexes foot
Innervation
Deep Fibular n.
Proximal Attachment
Anterior surface of fibula; interossesous membrane
Distal Attachment
Distal phalanx of great toe (1)
