Nerve Roots Lower

Question 1

Femoral n

Answer 1

• Innervates: quadriceps femoris, pectineus, iliacus, sartorius
• Nerve root: L2-L4

Question 2

Obturator n

Answer 2

• Innervates: adductor brevis, longus, Magnus, obturator internus & externus, pectineus, gracilis
• Nerve root: L2-L4
• Nerve to obturator internus: L5-S1

Question 3

Nerve to piriformis

Answer 3

• Innervates: piriformis
• Nerve root: S1-S2

Question 4

Nerve to quadratus femoris

Answer 4

• Innervates: quadratus femoris, gemellus inferior
• Nerve root: L4-S1

Question 5

Superior gluteal n

Answer 5

• Innervates: glute med & min, TFL
• Nerve root: L4-S1

Question 6

Inferior gluteal n

Answer 6

• Innervates: glute max
• Nerve root: L5-S2

Question 7

Sciatic n (tibial & common fibular)

Answer 7

• Innervates:
  
  • Tibial: semimembranosus, semitendinosus, biceps femoris (long), adductor Magnus, gastrocnemius, soleus, FDL, FHL, plantaria, tibialis posterior
  • Common fibular: biceps femoris (short)
    
    • Deep (L4-S2): tib ant, EDL, EHL, fibularis Tertius
    • Superficial (L5-S2): fibularis longus & brevis
• Nerve root: L4-S3 (sciatic)