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MSAK-1 > Muscles of the Thigh > Flashcards

Muscles of the Thigh Flashcards

1
Q

What is the IT band?

A

thickening of deep fascia of the thigh on the lateral side

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2
Q

What is deep fascia of the thigh?

A

tough fibrous sheath that invests the entire thigh like sleeve, its thickened laterally and forms IT band

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3
Q

What are the compartments of the thigh? What divides them?

A

anterior (ext), medial (ADD), post (flex) compartments separated by three intermuscular septae from fascia lata

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4
Q

What does the anterior (extensor) compartment of the thigh house? What joint does it act on?

A

houses extensors in the thigh that act on the knee joint

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5
Q

What nerve innervates the anterior (Extensor) compartment? Are there any exceptions?

A

femoral nerve, no

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6
Q

What does the medial (adductor) compartment of the thigh house? What joint does it act on?

A

houses the adductor muscles of the thigh (hip joint adductor)

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7
Q

What nerve innervates the medial (adductor) compartment? Are there any exceptions?

A

obturator nerve, pectineus is innervated by femoral nerve, adductor magnus is innervated by obturator and tibial nerve

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8
Q

What does the posterior (flexor) compartment of the thigh house? What joint does it act on?

A

flexor muscles in the thigh that act on the knee joint

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9
Q

What nerve innervates the posterior (flexor) compartment? Are there any exceptions?

A

sciatic nerve

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10
Q

What is the origin of the biceps femoris?

A

long head: ischial tuberosity, short head: linea aspera and lateral supracondylar ridge of femur

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11
Q

What is the insertion of the biceps femoris?

A

head of fibula and lateral condyle of the tibia

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12
Q

What are the functions of the biceps femoris?

A

flexion of leg @ knee joint, lateral rotation of leg @ knee joint when the knee is flexed, extension of thigh @ hip joint (long head), and posterior pelvic tilt @ hip joint

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13
Q

What nerve innervates the biceps femoris?

A

tibial nerve to the long head and common fibular to short head

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14
Q

What group of muscles are the main flexors of the leg?

A

hamstrings

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15
Q

What is the origin of the semitendinosus?

A

ischial tuberosity

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16
Q

What is the insertion of the semitendinosus?

A

the proximal part of the medial surface of the shaft of the tibia

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17
Q

What are the functions of the semitendinosus?

A

medial rotation of leg @ knee joint, extension of thigh @ hip joint, flexion of leg @ knee joint, posterior pelvic tilt @ hip joint

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18
Q

What nerve innervates the semitendinosus?

A

tibial nerve

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19
Q

What is the origin of the semimembranosus?

A

ischial tuberosity

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20
Q

What is the insertion of the semimembranosus?

A

posterior surface of the medial condyle of the tibia

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21
Q

What are the functions of the semimembranosus?

A

medial rotation of leg @ knee joint, extension of thigh @ hip joint, Flexion of leg @ knee joint, and posterior pelvic tilt @ hip joint (same as semitendinosus)

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22
Q

What nerve innervates semimembranosus?

A

tibial nerve

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23
Q

What is the tailor’s muscles?

A

sartorius

24
Q

What is the longest muscle in the body?

A

sartorius

25
Q

What is the origin of the sartorius?

A

ASIS

26
Q

What is the insertion of the sartorius?

A

proximal anteromedial tibia

27
Q

What are the functions of the sartorius?

A

flexion of leg @ knee joint, flexion of thigh @ hip joint, lateral rotation of thigh @ hip joint, medial rotation of leg @ knee joint, abduction of thigh @ hip joint

28
Q

What is the origin of the rectus femoris?

A

AIIS

29
Q

What is the insertion of the rectus femoris?

A

tibial tuberosity via patellar ligament and the base of the patella via quadriceps tendon

30
Q

What are the functions of the rectus femoris?

A

extension of leg @ knee joint, flexion of thigh @ hip joint

31
Q

What nerve innervates the rectus femoris?

A

femoral nerve

32
Q

What nerve innervates the sartorius?

A

femoral nerve

33
Q

What is the origin of the vastus lateralis?

A

lateral lip of linea aspera of femur

34
Q

What is the insertion of the vastus lateralis?

A

tibial tuberosity via patellar ligament

35
Q

What are the functions of the vastus lateralis?

A

extension of the leg @ knee joint

36
Q

What is the innervation of the vastus lateralis?

A

femoral nerve

37
Q

What is the origin of the vastus medialis?

A

medial lip of the linea aspera

38
Q

What is the insertion of the vastus medialis?

A

medial border of the patella via quadriceps tendon then the tibial tuberosity via patellar tendon

39
Q

What are the functions of the vastus medialis?

A

extension of the leg @ knee joint

40
Q

What nerve innervates the vastus medialis?

A

femoral nerve

41
Q

What is the origin of the adductor longus?

A

pubis

42
Q

What is the insertion of the adductor longus?

A

middle 1/3 of the medial lip of the linea aspera

43
Q

What are the functions of the adductor longus?

A

adduction of the thigh @ hip joint, flexion of thigh @ hip joint

44
Q

What nerve innervates the adductor longus?

A

obturator nerve

45
Q

What muscle acts as a border between the anterior and posterior thigh?

A

adductor magnus

46
Q

What is the origin of the adductor magnus

A

pubis and ischium

47
Q

What is the insertion of the adductor magnus

A

linea aspera, gluteal tuberosity, medial supracondylar line, adductor tubercle of the femur

48
Q

What are the functions of the adductor Magnus?

A

adduction of thigh @ hip joint, extension of thigh @ hip joint (posterior fibres), flexion of thigh @ hip joint (anterior fibres)

49
Q

What nerve innervates the adductor magnus?

A

anterior head obturator and posterior head by sciatic nerves (tibial nerve)

50
Q

What is the adductor hiatus?

A

borderline between anterior and medial thigh and posterior thigh for the femoral artery

51
Q

What is the origin of the gracilis?

A

pubis

52
Q

What is the insertion of the gracilis?

A

proximal part of the medial surface of the shaft of the tibia

53
Q

What are the functions of the gracilis?

A

flexion of thigh @ hip joint, adduction of thigh @ hip joint, flexion of leg @ knee joint, medial rotation of leg @ knee joint

54
Q

What is the innervation of the gracilis?

A

obturator nerve

55
Q

What muscles make up the pes anserinus tendon? Where is it located?

A

sartorius, gracilis, and semitendinosus attach to the upper medial side of the tibia in three-pronged pattern so their combined tendons of insertion are termed the pes anserinus

MSAK-1 (19 decks)

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