Thigh

Question 1

Sartorius attachments and actions

Answer 1

Attachments:
ASIS and superior half of notch inferior to ASIS
superior medial tibia (pes anserinus)

Action:
flexes thigh at hip
abducts thigh
laterally rotates thigh
flexes leg at knee

Question 2

Rectus Femoris attachments and actions

Answer 2

Attachments:
AIIS and ilium superior to acetabulum
base of patella (and tibial tuberosity via patella ligament)

Action:
flexion of thigh at hip
extension of leg at knee

Question 3

Vastus Medialis attachments and actions

Answer 3

Attachments:
intertrochanteric line and medial lip of linea aspera
base of patella (and tibial tuberosity via patella ligament)
aponeurotic fibres form medial patellar retinacula

Action:
extend leg at knee
counterbalance lateral pull of rectus femoris and vastus lateralis on patella (VMO)

Question 4

Vastus Lateralis attachments and actions

Answer 4

Attachments:
greater trochanter and lateral lip of linea aspera
base of patella (tibial tuberosity via patella ligament)
aponeurotic fibres form lateral patellar retinacula

Action:
extends leg at knee

Question 5

Vastus Intermedius attachments and actions

Answer 5

Attachments:
anterior and lateral surfaces of femoral shaft
base of patella (tibial tuberosity via patella ligament)

Action:
extension of the leg at the knee

Question 6

Articularis Genu attachments and actions

Answer 6

small, flat muscle attached to inferior anterior shaft of femur and superior aspect of knee joint (suprapatellar bursa)

Action:
pulls synovial membrane superiorly during extension of the leg at the knee

Question 7

Adductor Longus attachments and actions

Answer 7

Attachments:
body of pubis
middle third of linea aspera

Action:
adducts thigh
active during flexion and extension of thigh and gait

Question 7

Pectineus attachments and actions

Answer 7

Attachments:
superior pubic ramus
pectineal line

Action:
adducts and flexes thigh at hip joint
assists medial rotation

Question 8

Adductor Brevis attachments and actions

Answer 8

Attachments:
body and inferior ramus of pubis
pectineal line and proximal part of linea aspera

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

Question 9

Adductor Magnus attachments and actions

Answer 9

Attachments:
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

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

Question 10

Gracilis attachments and actions

Answer 10

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

Action:
adducts thigh
flexes leg at knee
rotates leg medially

Question 11

Semitendinosus attachments and actions

Answer 11

Attachments:
ischial tuberosity
medial superior tibia (pes anserinus)

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

Question 11

Pes Anserinus attachments and actions

Answer 11

distal tendinous attachments of:
gracilis
semitendinosus
sartorius

Question 12

Semimembranosus attachments and actions

Answer 12

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

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

Question 13

Biceps Femoris attachments and actions

Answer 13

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

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