Thigh Attachments, Actions, Innervations

Question 1

Sartorius Attachments

Answer 1

ASIS and superior half of notch inferior to ASIS

Pes anserinus (superior medial tibia)

Question 2

Sartorius Action

Answer 2

Flexes the thigh at the hip
abducts thigh
laterally rotates thigh
flexes leg at knee

Question 3

Sartorius Innervation

Answer 3

Femoral Nerve

L2, L3

Question 4

Rectus Femoris Attachments

Answer 4

AIIS and ilium superior to acetabulum

Base of patella (and tibial tuberosity vis patella ligament)

Question 5

Rectus Femoris Action

Answer 5

Flexion of thigh at hip

extension of leg at knee

Question 6

Rectus Femoris Innervation

Answer 6

Femoral Nerve L2, L3, L4

L3, L4 Main suppliers

Question 7

Vastus Medialis Attachments

Answer 7

intertrochanteric line and medial lip of linea aspera

base of patella (and tibial tuberosity via patella ligament)

aponeurotic fibres form medial patellar retinacula

Question 8

Vastus Medialis Actions

Answer 8

extend leg at knee

counterbalance lateral pull of rectus femoris and vastus lateralis on patella (VMO)

Question 9

Vastus Medialis Innervation

Answer 9

femoral nerve (L2, L3, L4)

L3, L4 main suppliers

Question 10

Vastus Lateralis Attachments

Answer 10

greater trochanter and lateral lip of linea aspera

base of patella (tibial tuberosity via patella ligament)

aponeurotic fibres form lateral patellar retinacula

Question 11

Vastus Lateralis Actions

Answer 11

Extends leg at knee

Question 12

Vastus Lateralis Innervation

Answer 12

Femoral nerve L2, L3, L4 (L3, L4 main suppliers)

Question 13

Vastus intermedius Attachments

Answer 13

anterior and lateral surfaces of femoral shaft

base of patella (tibial tuberosity via patella ligament)

Question 14

Vastus Intermedius Action

Answer 14

Extension of the leg at the knee

Question 15

Vastus Intermedius Innervation

Answer 15

femoral nerve L2, L3, L4 (L3 and L4 main suppliers)

Question 16

What is the articularis genu?Where does it attach?

Answer 16

It is a small, flat muscle, attached to inferior anterior knee

shaft of femur and superior aspect of knee joint (suprapatellar bursa)

Question 17

Articularis Genu Action

Answer 17

Pulls synovial membrane superiorly during extension of the leg at the knee

Question 18

Pectineus Attachments

Answer 18

Superior pubic rams

pectineal line

Question 19

Pectineus Action

Answer 19

Adducts and flexes thigh at hip joint

assists medial rotation

Question 20

Pectineus Innervation

Answer 20

femoral nerve (L2, L3) L2 main supplier

Question 21

Adductor Longus Attachments

Answer 21

Body of pubis

Middle third of line aspera

Question 22

Adductor Longus Action

Answer 22

adducts thigh

active during flexion and extension of thigh and gait

Question 23

Adductor Longus Innervation

Answer 23

Anterior division of obturator nerve L2, L3, L4 (L3 main supplier)

Question 24

Adductor Brevis Attachment

Answer 24

body and inferior ramus of pubis

pectineal line and proximal part of linea aspera

Question 25

Adductor Brevis Action

Answer 25

adducts thigh, active during flexion and extension of the thigh and gait

Question 26

Adductor Brevis Innervation

Answer 26

anterior division of obturator nerve (L2, L3, L4 (L3 main supplier)

Question 27

Adductor Magnus Attachments

Answer 27

adductor part: inferior ramus of pubis and ramus of ischium gluteal tuberosity and linea aspera hamstring part: ischial tuberosity medial supracondylar line and adductor tubercle

Question 28

Adductor Magnus Actions

Answer 28

adducts thigh flexes thigh (adductor part) extends thigh (hamstring part)

Question 29

Adductor Magnus Innervation

Answer 29

adductor part: posterior division of obturator nerve (L2, L3, L4) L3, L4 main suppliers hamstring part: sciatic nerve (L4)

Question 30

Gracilis Attachments

Answer 30

body and inferior ramus of pubis superior medial tibia (pes anserinus)

Question 31

Gracilis Action

Answer 31

adducts thigh flexes leg at knee rotates leg medially

Question 32

Gracilis Innervation

Answer 32

Obturator nerve (L2, L3) L2 main supplier

Question 33

What three muscles make up the Pes Anserinus

Answer 33

Distal Tendinous Attachment of: Gracilis Semitendinosus Sartorius

Question 34

What does Pes Anserinus Mean?

Answer 34

Goose's foot

Question 35

Semitendinosus Attachment

Answer 35

ischial tuberosity pes anserinus

Question 36

Semitendinosus Action

Answer 36

extends thigh at hip flexes leg at knee medially rotates leg if knee flexed

Question 37

Semitendinosus Innervation

Answer 37

tibial division of sciatic nerve (L5, S1, S2) | L5 and S1 main suppliers

Question 38

Semimembranosus Attachments

Answer 38

ischial tuberosity posterior aspect medial tibial condyle, forms oblique popliteal ligament

Question 39

Semimembranosus Action

Answer 39

extends thigh at hip flexes leg at knee medially rotates leg if knee flexed

Question 40

Semimembranosus Innervation

Answer 40

tibial division of sciatic nerve (L5, S1, S2) L5, S1 main suppliers

Question 41

Biceps Femoris Attachments

Answer 41

long head: ischial tuberosity short head: linea aspera and lateral supracondylar line head of fibula

Question 42

Biceps Femoris Action

Answer 42

flexion of leg at knee extension of thigh at hip laterally rotates leg if knee flexed

Question 43

Biceps Femoris Innervation

Answer 43

long head: tibial division of sciatic nerve (L5, S1, S2) S1 main supplier short head: common fibular division of sciatic nerve (L5, S1, S2) S1 main supplier