Muscles of the Lower Limb Flashcards Preview

Systemic Anatomy Unit 2 > Muscles of the Lower Limb > Flashcards

Flashcards in Muscles of the Lower Limb Deck (14)
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1

Gluteus Maximus

Gluteus Maximus
Origin: iliac crest, sacrum, coccyx and sacrospinalis ligament
Insertion: iliotibial tract and gluteal tuberosity of femur
Action: upper part abduction and laterally rotates the thigh; lower part extends and laterally rotates thigh

2

Piriformis

Piriformis
Origin: internal surface of sacrum and sacrotuberous ligament
Insertion: greater trochanter
Action: laterally rotates and abducts thigh

3

Adductor Longus

Adductor Longus
Origin: anterior body of pubis
Insertion: medial lip of linea aspera
Action: adducts thigh

4

Gracilis

Gracilis
Origin: body and inferior ramus of pubis
Insertion: superior medial shaft of tibia (at pes anserinus)
Action: adducts thigh at hip joint and flexes leg at knee joint

5

Sartorius

Sartorius
Origin: anterior superior iliac spine
Insertion: superior medial shaft of tibia (at pes anserinus)
Action: flexes, abducts, and laterally rotates thigh

6

Rectus Femoris

Rectus Femoris
Origin: anterior inferior iliac spine
Insertion: patella via quadriceps tendon; then to tibial tuberosity via patellar ligament
Action: extends leg at the knee joint; assists hip flexion

7

What are the four muscles in the quadriceps?

Rectus femoris
Vastus Lateralis
Vastus Medialis
Vastum Intermedius

8

What muscle flexes the thigh?

Rectus Femoris

9

What muscle aids in knee and hip flexion?

Sartorius

10

What is the tensor fasciae latae?

Braces the knee when opposite foot is lifted.

11

Biceps Femoris

Biceps Femoris
Origin: long head = ischial tuberosity; short head = linea aspera
Insertion: head of fibula and lateral condyle of tibia
Action: flexes leg and knee joint; assists in hip extension

12

Semitendinosus

Semitendinosus
Origin: ischial tuberosity
Insertion: superior medial shaft of tibia (at pes anserinus)
Action: flexes and slightly medially rotates leg at knee, and extends thigh at hip

13

Tibialis Anterior

Tibialis Anterior
Origin: lateral condyle and body of tibia, interosseous membrane
Insertion: first metatarsal and medial cuneiform
Action: dorsiflexion at ankle and foot inversion

14

Gastrocnemius

Gastrocnemius
Origin: medial and lateral condyles of femur
Insertion: calcaneus via tendocalcaneus (Achilles') tendon
Action: plantar flexion and assists in knee flexion