Glute and Thigh Muscles Flashcards Preview

S1 Anatomy > Glute and Thigh Muscles > Flashcards

Flashcards in Glute and Thigh Muscles Deck (87)
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1

tensor fascia latae
-origin

anterior part of iliac crest
iliac tubercle
ASIS
deep surface of fascia lata

2

tensor fascia latae
-insertion

iliobitial tract of fascia lata
-attaches to lateral condyle of tibia

3

tensor fascia latae
-actions

thigh
-flexion
-medial rotation (internal)
-abduction
tenses fascia lata
may assist in knee extension
steadies trunk on thigh

4

tensor fascia latae
-innervation

superior gluteal nerve
-dorsal divisional of L4, L5, S1

5

gluteus maximus
-origin

external surface
-ala of ilium - posterior to posterior gluteal line
-iliac crest
dorsal surface of sacrum
coccyx
sacrotuberous ligament

6

gluteus maximus
-insertion

iliotibial tract (which inserts in lateral condyle of tibia)
gluteal tuberosity of femur

7

gluteus maximus
-actions

thigh
-extension (more in forced movements such as climbing and running)
lateral rotation
steadies thigh flexion (during sitting)
extends pelvis when thigh fixed

8

gluteus maximus
-innervation

inferior gluteal nerve
-dorsal divisions of L5, S1, S2

9

gluteus medius
-origin

external surface of ilium
-between anterior and posterior gluteal lines

10

gluteus medius
-insertion

lateral surface of greater trochanter of femur

11

gluteus medius
-actions

abduction of thigh
medial rotation of thigh (anterior fibers)
lateral rotation of thigh (posterior fibers)
steadies pelvis (tilts) to same side during locomotion, allowing opposite side foot to clear ground
-fixing of femur and abduction tilts the pelvis

12

gluteus medius
-innervation

superior gluteal nerve
-dorsal divisions of L4, L5, S1

13

gluteus minimus
-origin

external surface of ilium
-between anterior and inferior gluteal lines

14

gluteus minimus
-insertion

anterior surface of greater trochanter of femur

15

gluteus minimus
-actions

abduction of thigh
medial rotation of thigh
steadies pelvis (same as G. medius)

16

gluteus minimus
-innervation

superior gluteal nerve
-dorsal divisions of L4, L5, S1

17

piriformis
-origin

anterior surface of sacrum (within the pelvis)
superior margin of greater sciatic notch
sacrotuberous ligament

18

piriformis
-insertion

superior border of the greater trochanter
-leaves pelvis minor through greater sciatic foramen

19

piriformis
-actions

rotates thigh (extended) laterally
abducts (flexed) thigh
assist in holding the head of the femur in the acetabulum

20

piriformis
-innervation

dorsal division branches of ventral rami of S1 and S2

21

obturator internus
-origin

pelvic surfaces of ilium and ischium
internal surface of obturator membrane

22

obturator internus
-insertion

medial surface of greater trochanter of femur

23

obturator internus
-actions

laterally rotates extended thigh
abducts flexed thigh
assists in holding head of femur in acetabulum

24

obturator internus
-innnervation

nerve to obturator internus (ventral divisions of L5, S1

25

obturator externus
-origin

rami of pubis and ischium
external surface of obturator membrane

26

obturator externus
-insertion

trochanteric fossa of femur

27

obturator externus
-actions

laterally rotates extended thigh
steadies head of femur in acetabulum

28

obturator externus
-innervation

obturator nerve (L3, L4)

29

gemellus superior, inferior
-origin

superior
-ischial spine
inferior
-ischial tuberosity

30

gemellus superior, inferior
-insertion

medial surface of greater trochanter
-common tendon with obturator internus