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KN 251 Week 13 Muscl

Includes thigh and leg (anterior & posterior compartment) muscles

TermDefinition
Psoas Major Action: Flexes the thigh, ipsilateral laterally bends the vertebral column Innervation: L1-L3 Origin: Lumbar vertebrae Insertion: Lesser trochanter Hip joint/Thigh-Anterior
Iliacus Action: Flexes the thigh Innervation: Femoral Origin: Iliac fossa Insertion: Lesser trochanter Hip joint/Thigh-Anterior
Psoas Minor Action: Aids in flexing of trunk Innervation: L2-L3 Origin: N/A Insertion: N/A
Gluteus Maximus Action: Extends the thigh, laterally rotate the thigh, abducts the thigh Innervation: Inferior gluteal Origin: Dorsal ilium, sacrum, coccyx Insertion: Gluteal tuberosity of femur, iliotibial tract Gluteal-Posterior
Gluteus Medius Action: Abducts the thigh, medially rotates the thigh, stabilizes the pelvis while walking Innervation: Superior gluteal Origin: Lateral surface of ilium Insertion: Greater trochanter of femur Gluteal-Posterior
Gluteus Minimus Action: Abducts the thigh, medially rotates the thigh, stabilizes the pelvis while walking Innervation: Superior gluteal Origin: Lateral surface of ilium Insertion: Greater trochanter of femur Gluteal-Posterior
Piriformis Action: Abducts the thigh, laterally rotates the thigh Innervation: L5, S1, S2 Origin: N/A Insertion: Greater trochanter of femur Gluteal-Deep
Gemellus Superior Action: Rotates thigh laterally Innervation: L5, S1 Origin: N/A Insertion: Greater trochanter of femur Gluteal-Deep
Obturator Internus Action: Abducts and laterally rotates thigh Innervation: L5, S1 Origin: N/A Insertion: Greater trocanther of femur Gluteal-Deep
Gemellus Inferior Action: Rotates thigh laterally Innervation: L5, S1 Origin: N/A Insertion: Greater trochanter of femur Gluteal-Deep
Obturator Externus Action: Laterally rotates thigh Innervation: Obturator Origin: N/A Insertion: Greater trochanter of femur Gluteal-Deep
Quadratus Femoris Action: Laterally rotates thigh Innervation: L5, S1 Origin: N/A Insertion: Greater trochanter of femur
Sartorius Action: Flexes thigh, flexes knee, abducts and laterally rotates the thigh, actions produce a crossed-legged position Innervation: Femoral Origin: ASIS Insertion: Medial side of proximal tibia Thigh-Anterior
Vastus Medialis Action: Extends leg Innervation: Femoral Origin: Linea aspera, intertrochanteric line Insertion: Patella and tibial tuberosity Thigh-Anterior-Quadriceps Femoris
Vastus Lateralis Action: Extends the knee, stabilizes the patella Innervation: Femoral Origin: Intertrochanteric line, proximal half of linea aspera Insertion: patella and tibial tuberosity Thigh-Anterior-Quadriceps Femoris
Vastus Intermedius Action: Extends leg Innervation: Femoral Origin: Anterior and lateral protion of proximal femur Insertion: Patella and tibial tuberosity Thigh-Anterior-Quadriceps Femoris
Rectus Femoris Action: Extends the knee, flexes the thigh at the hip Innervation: Femoral Origin: Anterior Inferior Iliac Spine (AIIS) Insertion: Patella and tibial tuberosity Thigh-Anterior-Quadriceps Femoris
Adductor Longus Action: Adducts and flexes the thigh, rotates the thigh medially Innervation: Obturator Origin: N/A Insertion: N/A Thigh-Medial
Adductor Brevis Action: Adducts and flexes the thigh, rotates the thigh medially Innervation: Obturator Origin: N/A Insertion: N/A Thigh-Medial
Adductor Magnus Action: Adducts and flexes the thigh, rotates the thigh medially Innervation: Obturator and Sciatic Origin: Ischial tuberosity, ischial ramus, inferior ramus of pubis Insertion: Linea aspera and adductor tubercle of femur Thigh-Medial
Pectineus Action: Adducts and flexes the thigh Innervation: Femoral Origin: N/A Insertion: N/A Thigh-Medial
Gracilis Action: Adducts and flexes the thigh, flexes and rotates the leg medially Innervation: Obturator Origin: Body and inferior ramus of pubis Insertion: Medial surface of proximal tibia Thigh-Medial
Biceps Femoris Action: Extends thigh, flexes knee Innervation: Long head-sciatic, Short head-common fibular Origin: Long head-ischial tuberosity, Short head-linea aspera Insertion: Head of fibula, lateral condyle of tibia Thigh-Posterior-Hamstrings
Semitendinosus Action: Extends thigh, flexes knee Innervation: Sciatic Origin: Ischial tuberosity Insertion: Medial surface of proximal tibia Thigh-Posterior-Hamstrings
Semimebranosus Action: Extends thigh, flexes knee Innervation: Sciatic Origin: N/A Insertion: N/A Thigh-Posterior-Hamstrings
Tensor Fascia Latae Action: Abducts and flexes thigh, rotates thigh medially, tightens the fascia lata and deep fascia of lateral thigh Innervation: Superior gluteal Origin: Iliac crest and Anterior Superior Iliac Spine (ASIS) Insertion: Iliotibial tract Thigh-Lateral
Iliotibial Band (Connective Tissues) Action: Laterally supports the knee when the tensor fascia lata contracts Innervation: N/A Origin: Iliac crest Insertion: Lateral condyle of tibia Thigh-Lateral
Tibialis Anterior Action: Dorsiflexes and inverts the foot Innervation: Deep fibular Origin: Lateral condyle and upper diaphysis of tibia Insertion: First cuneiform and base of first metatarsal Leg-Anterior
Extensor Hallicus Longus Action: Extends the big toe, dorsiflexes the foot Innervation: Deep fibular Origin: N/A Insertion: N/A Leg-Anterior
Extensor Digitorum Longus Action: Extends the toes, dorsiflexes the foot Innervation: Deep fibular Origin: N/A Insertion: N/A Leg-Anterior
Fibularis Longus Action: Everts the foot, plantar flexes the foot Innervation: Superficial fibular Origin: N/A Insertion: N/A Leg-Lateral
Fibularis Brevis Action: Everts the foot, plantar flexes the foot Innervation: Superficial fibular Origin: N/A Insertion: N/A Leg-Lateral
Gastrocnemius Action: Plantar flexes the foot assists with knee flexion Innervation: Tibial Origin: Medial and lateral condyles of femur Insertion: Posterior surface of calcaneus
Soleus Action: Plantar flexes the foot Innervation: Tibial Origin: Head of fibula, proximal tibia, and interosseus membrane Insertion: Posterior surface of calcaneus
Plantaris Action: Plantar flexes the foot, assists with knee flexion Innervation: Tibial Origin: N/A Insertion: N/A
Popliteus Action: Knee flexion, laterally rotating the femur on the tibia when walking Innervation: Tibial Origin: N/A Insertion: N/A
Tibialis Posterior Action: Inverts the foot and plantar flexion Innervation: Tibial Origin: N/A Insertion: N/A
Flexor Digitorum Longus Action: Flexes digits 2-5 and plantar flexion Innervation: Tibial Origin: N/A Insertion: N/A
Flexor Hallicus Longus Action: Flexes the great toe and plantar flexion Innervation: Tibial Origin: Posterior fibula and interosseus membrane Insertion: Base of distal phalanx of great toe
Created by: mprez2
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