Anterior & medial Thigh Muscles

Question 1

Anterior compartment of thigh (6)? Common function? Common nerve innervation?

Answer 1

1. Sartorius
2. Rectus Femoris
3. Vastus Lateralis
4. Vastus medialis
5. Vastus Intermedius
6. Articularis Genus

**extensor of knee joint
EXCEPTION: sartorius

N: femoral

Question 2

Sartoruis O, I & function (5)?

Answer 2

O: ASIS
I: Medial proximal tibia shaft (pes anserine tendon)
Function: FALF + med rot
1. Flex thigh @ hip
2. Abd @ hip
3. Lateral rot @ hip
4. Flex leg @ knee
5. Med rot. of knee

Question 3

Rectus femoris O,I & function?

Answer 3

O:
straight/anterior: AIIS
reflected posterior: groove above acetabulum
I: base of petalla via quad tendon & tibial tuberosity via patella ligament
Function:
1. Extend leg @ knee
2. Flex thigh @ hip

Question 4

Vastus lateralis & vastus intermedius function?

Answer 4

1. extend leg @ knee

Question 5

Vastus Medialis O, I & function

Answer 5

O: intertrochanteric line, linea aspera (medial lip), medial supracondylar line
I: Medial border of patella via quad tendon & tibial tuberosity via patella tendon
F:
1. Extend leg @ knee

Question 6

Articularis genus function (2)?

Answer 6

1. Elevates capsule & synovial membrane of the knee joint
2. Prevents them from being pinched during leg extension

Question 7

Medial/adductor compartment of the thigh muscles (5)?

Answer 7

1. Pectineus
2. Adductor Longus
3. Adductor Brevis
4. Adductor Magnus
5. Gracilis

Question 8

Nerve innervation of medial /adductor compartment of thigh?

Answer 8

All obturator n. except
Pectineus = femoral n.
Adductor Magnus posterior head = tibial n

Question 9

Pectineus functions (2)?

Answer 9

1. Add thigh @ hip
2. Flex thigh @ hip

Question 10

Adductor longus & brevis functions (3)?

Answer 10

1. Add thigh @ hip
2. Flex thigh @ hip
3. Lateral rotation @ hip

Question 11

Adductor Magnus function (4)?

Answer 11

anterior & posterior head

1. Add thigh @ hip
2. Flex thigh @ hip (anterior)
3. Extend thigh @ hip (post)
4. Lat. rot @ hip joint

Question 12

Adductor Hiatus?

Answer 12

opening between 2 heads of adductor Magnus where femoral a & v pass through

Question 13

Gracilis function (4)?

Answer 13

1. Add thigh @ hip
2. Flex thigh @ hip
3. Flex leg @ knee
4. Med rot @ knee

Question 14

Scissor’s Gait?

Answer 14

Adductor muscle spastic in patients with cerebral palsy
-need tenotomy

Question 15

Pes Anserinus?

Answer 15

Sartorius + gracilis + semitendinosus all insert on proximal medial tibial shaft

**Say Grace before Tea (from outside to inside)
1. Sartorius
2. Gracilis
3. Semitendinosus

Question 16

Femoral triangle?

Answer 16

triangular depression on front upper thigh with apex continuous with adductor canal (Intermuscular space situated on medial side of middle 1/3 thigh)

Question 17

Femoral triangle borders?

Answer 17

SAIL
Lateral: Sartorius m.
Medial: Adductors
Base: Inguinal Ligament

Question 18

Femoral triangle contents?

Answer 18

Lateral to medial:

Navel
Nerve (femoral)
Artery (femoral)
Vein (femoral)
Empty space
Lymph

Question 19

Femoral Canal?

Answer 19

-inverted cone shaped fascial space within femoral triangle, medial to femoral v.
-opens superiorly as femoral ring
FNC: allows vein to expand during increased venous blood return
-femoral hernias can occur in the empty space