Muscles of Hip + Thigh Flashcards Preview

Jonathan's Locomotor > Muscles of Hip + Thigh > Flashcards

Flashcards in Muscles of Hip + Thigh Deck (37):
1

What are the major muscles arising from 1) inside the pelvic basin 2) Outside the pelvic basin

1) iliacus
2) gluteal muscles

2

What's the angle of inclination for the femur?

the angle between the neck and the shaft, which is approximately 120 degrees

3

what are the muscles inserting into the fascia lata?

glu max posteriorly
tensor fascia lata anteriorly

4

What are the actions of glut max?

extension of the hip
lateral rotation of the hip

5

What are the actions of tensor fascia lata?

hip flexion and medial rotation

6

What is the origin and insertion of glut max?

arises from the back of sacrum and the posterior gluteal line

insert into fascia lata (iliotibial tract) and the gluteal tuberosity

7

Where is the gluteal tuberosity?

inferior to the greater trochanter

8

T/F glut max mainly helps us to walk on level ground

False, it is a powerful muscle that helps us to move from flexion to standing position

9

T/F Glut medius arises medial to glut minimus on the pelvic gluteal surface

True, and medius will be superficial to minimus

10

What are the actions of glut medius and minimus

main abductor of the thigh
medial rotation of the thigh (because it attaches to anterior greater trochanter)

11

Where is piriformis?

triangular muscle inferior to glut minimus

12

What is the origin and insertion of piriformis?

arises inside the pelvis, exit the GSN, insert lateral greater trochanter

13

What's the function/action of piriformis?

abduction of the hip
also serves as a organising structure for neurovascular structures

14

Which muscles are inferior to piriformis?

obturator internus and the superior/inferior gemelli

15

Which muscle is directly posterior to the hip joint?

quadratus femoris

16

What's the course of diretion of sartorius?

infero-medial

17

What's the action of sartorius?

muscle for checking dog poo

18

Which muscle can be found above the line set by sartorius?

iliopsoas, into the lesser trochanter medially on the femur

pectineous and adductor muscles

19

What is the function of iliopsoas?

hip flexion
important for posture control + maintaining normal lumbar lordosis

20

How is pectineous a "transitional muscle"

it has components in anterior and medial compartments of the thigh, hence has dural nerve supply

21

What are the actions of pectineous?

anteriorly, it is a hip flexor
medially, it is an adductor

22

Where do the quads muscles insert into?

tibial tuberosity anteriorly on the tibia, via the patella

23

What are the four quad muscles?

vastus lateralis, medialis, intermedius

rectus femoris

24

How does rectus femoris oppose the action of vastus medialis?

contraction of RF on patella tend to displace the patella laterally. VM keeps the patella in place

25

Does rectus intermedius insert into the quadraceps tendon?

yes, it has an anterior aponeurosis that blends wit hthe tendon

26

Which quad muscle crosses two joints?

rectus femoris, classically for kicking a ball

27

Which adductor muscle forms the medial border of the medial compartment?

gracilis

28

T/F gracilis crosses two joints

True, it is the only muscle of the medial compartment that crosses hip and knee joints

29

Where do adductors muscles arise from?

inferior ramus of the pelvis

30

What are the 3 main adductor muscles and where do they insert into?

adductor brevis (proximal linear aspera)
adductor longus (distal LA)
adductor magnus (whole LA)

31

How is adductor magnus another "transitional muscle"?

it shares action with hamstrings
origin extends to ischial ramus laterally, which travels vertically down to insert into adductor tubercle

32

What are the muscles of the posterior compartment?

semimembranosus
semitendonosus
biceps femoris

33

Looking on the back of the thigh superficially, list the muscles from most medial to most lateral

Gracilis/adductor magus
Semimembranosus
Semitendonosus
long head biceps
iliotibial tracts

34

Where do the hamstring muscles arise from?

all from ischial tuberosity aside from short head of biceps, arising on linear aspera

35

Where does biceps femoris insert into?

head of fibula

36

Which muscles insert into the proximal tibia as pes anserinus?

sartorius
gracilis
semi-tendinosus

37

Where does the semimembranosus muscle insert into?

medial condyle of the tibia