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PHTH 510 > Thigh Muscles > Flashcards

Thigh Muscles Flashcards

1
Q

What are the muscles of the anterior compartment of the thigh?

A

1.psoas major
2.illiacus
3.iliopsoas (combo)
4. sartorius
5. vastus medialis
6.vastus intermedius
7. vastus lateralis
8. rectus femoris

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2
Q

what is the origin of the psoas major?

A

The sides of T12 to L5 and the intervertebral discs

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3
Q

what is the insertion of the psoas major?

A

lesser trochanter

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4
Q

what is the action of the psoas major?

A

flex the thigh and the trunk

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5
Q

what is the innervation of the psoas major?

A

Spinal nerves L1-L3

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6
Q

what is the origin of the illiacus?

A

iliac fossa

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7
Q

what is the insertion of the illiacus?

A

lesser trochanter

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8
Q

what is the action of the illiacus?

A

flexes the thigh and the trunk

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9
Q

what is the action of the iliopsoas?

A

-To maintain upright posture.
-Start the swinging phase.
-Pull the trunk froward from standing to sitting
-From sitting to lying, pulls on the pelvis and lower vertebrae to pull the trunk up

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10
Q

what major nerve innervates the anterior compartment of the thigh?

A

Femoral Nerve (L2&L3)

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11
Q

what is the origin of the sartorius?

A

ASIS

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12
Q

what is the insertion of the sartorius?

A

The pes anserinus (medial surface of superior shaft of tibia)

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13
Q

what is the action of the sartorius?

A

flex the hip and flex the leg

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14
Q

what is the origin of rectus femoris?

A

AIIS and the grove superior to the acetabulum

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15
Q

what is the insertion of rectus femoris?

A

Base of patella to form the more central portion of the quad femoris tendon

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16
Q

what is the action of rectus femoris?

A

Extend the leg and flex the hip

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17
Q

what is the orgin of vastus lateralis?

A

greater trochanter

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18
Q

what is the insertion of vastus lateralis?

A

Base of patella to form the more lateral portion of the quad femoris tendon

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19
Q

vastus lateralis, vastus intermedius, and vastus medialis will…. (action)

A

extend the leg

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20
Q

what is the origin of vastus intermedius

A

the intertrochanteric line of the femur and the upper anterior surface of the femur

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21
Q

what is the insertion of vastus intermedius

A

Base of patella to form the quad femoris tendon

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22
Q

what muscles in the anterior compartment of the thigh will extend the leg?

A

rectus femoris, vastus lateralis, vastus intermedius, vastus medialis.

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23
Q

what is the origin of vastus medialis?

A

intertrochanteric line and linea aspera

24
Q

what is the insertion of vastus medialis?

A

Base of patella to form the more medial portion of the quad femoris tendon

25
Q

what two muscles in the anterior compartment of the thigh have the lesser trochanter as their insertion?

A

Psoas major and illiacus

26
Q

What are the muscles of the medial compartment of the thigh?

A

1.gracilis
2. pectineus
3. adductor magnus
4.adductor brevis
5. adductor longus

27
Q

what is the major innervation of the medial compartment of the thigh?

A

the obturator nerve
HOWEVER the pectineus will be innervated by the femoral nerve.

28
Q

What is the origin of the adductor longus?

A

body of the pubis close to the symphysis

29
Q

what is the insertion of adductor longus?

A

linear aspera of the femur

30
Q

what is the major muscle action of the medial compartment of the thigh?

A

adduction of the thigh

31
Q

what is the action of the adductor longus?

A

adduct the thigh and medially rotate the thigh

32
Q

what is the origin of the adductor brevis?

A

inferior pubic ramus close to the symphysis

33
Q

what is the insertion of adductor brevis?

A

upper part of the linea aspera

34
Q

what is the action of the adductor brevis

A

adduct the thigh

35
Q

what is the origin of adductor magnus?

A

inferior ramus of pubis, inferior ramus of ischium, and ischial tuberosity

36
Q

what is the insertion of adductor magnus?

A

linea aspera and supracondylar line

37
Q

what is the action of adductor magnus?

A

adduct thigh

38
Q

what is the origin of gracilis?

A

inferior ramus of pubis

39
Q

what is the insertion of gracilis?

A

pes anserinus

40
Q

what is the action of gracilis?

A

adduct and flex the thigh

41
Q

what is the origin of pectineus

A

superior ramus of pubis

42
Q

what is the insertion of pectineus

A

pectineal line of femur

43
Q

what is the action of pectineus

A

adduct and flex the thigh

44
Q

what is the main innervation of the posterior compartment of the thigh?

A

the tibial nerve with the exception of common fibular for biceps femoris short head

45
Q

what is the main action of the posterior compartment of the thigh?

A

knee flexion and thigh extension

46
Q

what is the origin of biceps femoris long head

A

ischial tuberosity

47
Q

what is the insertion of biceps femoris long head?

A

lateral tibia

48
Q

what is the action of the biceps femoris long head?

A

thigh extension

49
Q

what is the origin of bicep femoris short head?

A

linea aspera

50
Q

what is the insertion of bicep femoris short head?

A

head of fibula

51
Q

what is the action of bicep femoris short head?

A

knee flexion

52
Q

what is the origin of semitendinosus

A

ischial tuberosity

53
Q

what is the insertion of semitendinosus

A

pes ansernius

54
Q

what is the shared action between semitendinosus and semimembranosus?

A

thigh extension and knee flexion

55
Q

what is the origin of semimembranosus

A

ischial tuberosity

56
Q

what is the insertion of semimembranosus

A

medial condyle of tibia

PHTH 510 (7 decks)

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