Posterior Thigh

Question 1

The muscles in the posterior compartment of the thigh are collectively known as the…

Answer 1

• Hamstrings

Question 2

Name the 3 muscles of the posterior thigh:

Answer 2

1. Biceps femoris
2. Semitendinosus
3. Semimembranosus

Question 3

Bicep Femoris:

• Description: (1)
• Attachments: (2)
• Actions (4)
• Innervation: (2)
• Blood supply (1)

Answer 3

• Description: Lateral
• Attachments:
  
  • Long head: Ischial tuberosity
  • Short head: Linea aspera
  • Head of fibula
• Action:
  
  • Knee: Flexion, lateral rotation
  • Hip: Extension, lateral rotation
• Innervation:
  
  • Long head: Tibial part - of sciactic nerve
  • Short head Common fibular part - of sciatic nerve
• Blood supply:
  
  • Profunda femoris

Question 4

Semitendinosus is ……… to bicep femoris and …………… to semimembranosus

Answer 4

• Medial
• Superficial

Question 5

Semimembranosus is ……….. to semitendinosus.

Answer 5

• Deep

Question 6

Semitendinosus & Semimembranosus

• Attachment: (2)
• Actions (4)
• Innervation (1)
• Blood supply (2)

Answer 6

• Attachment:
  
  • Semitendinosus: Ischial tuberosity - medial surface of tibia
  • Semimembranosus: Ischial tuberosity - medial tibial condyle
• Actions:
  
  • Knee: Flexion & medial rotation
  • Hip: Extension & medial rotation
• Innervation: Tibial part of sciatic nerve
• Blood supply: Profunda femoris & inferior gluteal