Anterior Thigh

Question 1

Iliopsoas refers to 2 muscles, what are they?

Answer 1

1. Psoas major
2. Iliacus

Question 2

Iliopsoas: (2 muscles):

• Attachment of both
• Action
• Innervation of both
• Blood supply

Answer 2

• Attachment:
  
  • Psoas Major: Lumbar vertebrae - Lesser Trochanter
  • Iliacus: iliac fossa - Lesser Trochanter
• Action:
  
  • Hip flexion
• Innervation:
  
  • Psoas Major: Anterior Rami (L1-L3)
  • Iliacus: Femoral nerve
• Blood supply:
  
  • Illiolumbar (internal iliac)

Question 3

Quadriceps Femoris consists of 4 muscles, what are they?

Answer 3

1. Vastus Lateralis
2. Vastus Intermedius
3. Vastus Medialis
4. Rectus Femoris

Question 4

Quadriceps Femoris:

• Attachments (4)
• Actions of (2)
• Innervation (1)
• Blood supply (2)

Answer 4

• Attachments:
  
  • Vastus Lateralis: Greater trochanter/lateral lip of linea aspera
  • Vastus Intermedius: Anterior/lateral surfaces of femoral shaft
  • Vastus Medialis: intertrochanteric line/medial lip of the linea aspera
  • Rectus Femoris: ilium (superior to acetabulum)
    
    • Attach to patella via quad tendon
• Actions:
  
  • All:
  • Rectus Femoris: Hip flexion
• Innervation:
  
  • Femoral nerve
• Blood supply:
  
  • Profunda femoris (lateral circumflex) & popliteal (superior medial genicular)

Question 5

Why is rectus femoris involved in hip and knee actions?

Answer 5

• Crosses hip and knee joints

Question 6

• Give 3 descriptions of the muscle
• Attachment:
• Actions (4)
• Innervation:
• Blood supply (4)

Answer 6

• Long, superficial, Inferomedial direction
• Attachments: ASIS - Medial surface of tibia
• Actions:
  
  • HIP: Flexor, abductor and lateral rotator
  • KNEE: Flexor
• Innervation: Femoral nerve
• Blood supply: Iliac, femoral, profunda femoris (lateral circumflex) and popliteal (superior medial genicular)

Question 7

Clinical Relevance:

• Quadricep femoris muscles can be used to tests…
• How?
• Positive result?

Answer 7

• Femoral nerve
• Patient supine, knees slightly flexed, extend knee against resistance
• Contraction of quadricep femoris = absent

Question 8

Name the 7 muscles found in the anterior thigh:

Answer 8

• Iliacus
• Psoas Major
• Vastus lateralis
• Vastus Intermedius
• Vastus Medialis
• Rectus femoris
• Sartorius