Posterior Thigh and Gluteal Region Flashcards Preview

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Flashcards in Posterior Thigh and Gluteal Region Deck (45):
1

how many muscles are there in the posterior thigh compartment?

3

2

name the 3 muscles of the posterior thigh

biceps femoris
semitendinosus
semimembranosus

3

what is an alternative name for the posterior thigh muscles?

hamstrings

4

what is the general function of the hamstrings?

extension at hip, flexion at knee

5

which nerve innervates the posterior thigh?

sciatic nerve (L4-S3)

6

where can the common tendon of the biceps femoris be felt?

laterally at posterior knee

7

what are the attachments of the biceps femoris?

long head: ischial tuberosity, short head: linea aspera
both to head of fibula

8

what is the action of the biceps femoris?

flexion at knee
also, extension at hip, lateral rotation at hip and at knee

9

describe the innervation of the biceps femoris

long head = tibial part of sciatic nerve
short head = common fibular part of sciatic nerve

10

what are the attachments of semitendinosus?

ischial tuberosity to medial surface of tibia

11

what is the action of semitendinosus and semimembranosus?

flexion at knee
extension of thigh at hip
medially rotates thigh at hip and leg at knee

12

which is more superficial, semitendinosus or semimembranosus?

semitendinosus

13

what is the innervation of semitendinosus and semimembranosus?

tibial part of sciatic nerve

14

what are the attachments of semimembranosus?

ischial tuberosity to medial tibial condyle

15

how many muscles are there in the superficial gluteal region?

3

16

how many muscles are there in the deep gluteal region?

5

17

how many muscles are there in the gluteal region?

8

18

name the three superficial gluteal muscles

gluteus maximus, medius and minimus

19

which gluteal muscle gives the shape of the buttocks?

gluteus maximus

20

name the five deep gluteal muscles

piriformis
obturator internus
gemelli - superior and inferior
quadratus femoris

21

what is the general action of the superficial gluteal region?

abduction and extension of thigh

22

what are the attachments of gluteus maximus

gluteal surface of ilium, sacrum and coccyx to iliotibial tract and greater trochanter of femur

23

what is the action of gluteus maximus?

main extensor of thigh
assists with lateral rotation

24

what is the innervation of gluteus maximus?

inferior gluteal nerve

25

what does the inferior gluteal nerve innervate?

gluteus maximus

26

what does the superior gluteal nerve innervate?

gluteus medius and minimus

27

what are the attachments of gluteus medius?

gluteal surface of ilium to lateral surface of greater trochanter

28

what is the action of gluteus medius?

abducts and medially rotates lower limb
secures pelvis during locomotion

29

which two superficial gluteal muscles help secure the pelvis during locomotion?

gluteus medius and minimus

30

what is the innervation of gluteus medius?

superior gluteal nerve

31

what are the attachments of gluteus minimus?

ilium, converges to form a tendon to the anterior side of greater trochanter

32

what is the innervation of gluteus minimus?

superior gluteal nerve

33

what is the action of gluteus minimus?

abducts and medially rotates lower limb
secures pelvis during locomotion

34

which of the deep gluteal muscles produces ONLY lateral rotation, no abduction?

quadratus femoris

35

what is the general action of the deep gluteal muscles?

lateral rotation and abduction (apart from quadratus femoris)

36

what are the attachments of piriformis?

anterior surface of sacrum, through greater sciatic foramen to greater trochanter of femur

37

what is the innervation of piriformis?

nerve to piriformis

38

what are the attachments of the obturator internus?

pubis and ischium at obturator foramen, through sciatic foramen to greater trochanter

39

what is the innervation of the obturator internus?

nerve to obturator internus

40

what are the attachments of the gemelli?

superior: ischial spine, inferior: ischial tuberosity
both go to greater trochanter of femur

41

describe the innervation of the gemelli

superior = nerve to obturator internus
inferior = nerve to quadratus femoris

42

what does the nerve to quadratus femoris innervate?

quadratus femoris and inferior gemellus

43

what does the nerve to obturator internus innervate?

obturator internus and superior gemellus

44

what are the attachments of quadratus femoris?

lateral side of ischial tuberosity to quadrate tuberosity on intertrochanteric crest

45

name the 7 muscles that attach to the greater trochanter

origin: vastus lateralis
insertion:
obturator internus
gemelli - superior and inferior
piriformis
gluteus medius
gluteus minimis