KIN 100 - Muscles Of The Anterior And Medial Thigh (lecture 18)

Question 1

What muscle compartments does the fascia last extends into

Answer 1

1. Anterior thigh
2. Medial thigh
3. Posterior thigh

Question 2

What are the muscles of the Anterior thigh

Answer 2

1. Pectineus
2. Iliopsoas
3. Sartorius
4. Quadriceps femoris

Question 3

Pectineus

Answer 3

Proximal attachment: superior ramus of pubis

Distal attachment: Pectineal line

Innervation: femoral nerve and obturator nerve

Actions:
- hip flexion
- hip adduction
- hip medial rotation

Question 4

Iliopsoas

Answer 4

Proximal attachment:
iliacus: iliac fossa
Psoas major: Lateral aspect of lumbar vertebrae

Distal attachment: Lesser trochanter of femur

Innervation: Femoral nerve

Actions:
- Trunk flexion (psoas major only)
- Hip flexion
- Hip stability

Question 5

Sartorius

Answer 5

Proximal attachment: ASIS

Distal attachment: Medial tibia (pes anserinus)

Innervation: Femoral nerve

Actions:
- Hip flexion
- Hip abduction
- Hip lateral rotation
- Knee flexion

Question 6

Quadriceps femoris

Answer 6

Proximal attachment:
Rectus femoris: AIIS
Vastus medialis: Linea aspera
Vastus lateralis: Linea aspera
Vastus intermedius: Shaft of femur

Distal attachment: Tibial tuberosity via quadriceps tendon, patella, and patellar ligament

Innervation: Femoral nerve

Actions:
- Hip flexion (rectus femoris only)
- Knee extension

Question 7

What are the muscles of the medial thigh

Answer 7

1. Adductor longus
2. Adductor brevis
3. Adductor magnus
4. Gracilis
5. Obturator externus

Question 8

What makes up the medial border of the femoral triangle

Answer 8

adductor longus

Question 9

Adductor longus

Answer 9

Proximal attachment: Pubic bone

Distal attachment: Linea aspera

Innervation: Obturator nerve

Action: Hip adduction

Question 10

Adductor brevis

Answer 10

*deep to adductor longus
Proximal attachment: Pubic bone

Distal attachment: Linea aspera

Innervation: Obturator nerve

Action: Hip adduction

Question 11

Adductor magnus

Answer 11

*deep to adductor longus and brevis
Proximal attachment:
Adductor part: Pubis and ischium
Hamstring part: Ischial tuberosity

Distal attachment:
Adductor part: Linea aspera
Hamstring part: Adductor tubercle

Innervation:
Adductor part: Obturator nerve
Hamstring part: Tibial branch of sciatic nerve

Actions:
- Hip adduction (both parts)
- Adductor part: Hip flexion
- Hamstring part: Hip extension

Question 12

Gracilis

Answer 12

Proximal attachment: Pubic bone

Distal attachment: Medial tibia (pes anserinus)

Innervation: Obturator nerve

Actions:
Hip adduction
Knee flexion

Question 13

Obturator Externus

Answer 13

Proximal attachment: External surface of obturator membrane

Distal attachment: Trochanteric fossa

Innervation: Obturator nerve

Action: Lateral hip rotation