Sacral Plexus

Question 0

Sacral- important nerves

Answer 0

Sciatic( largest nerve in body; splits to common fibular and tibial nerves just above knee)

• Common fibular( superficial and deep branches)
• Tibial ( including Sural and planter branches)

Superior and inferior gluteal

Question 1

Sacral- origin( from ventral rami)

Answer 1

L4-L5 and S1-S4

Question 2

Sacral- Sciatic- body area served

Answer 2

Lower trunk and posterior surface of thigh ( hip extensors and knee flexors)

Question 3

Sacral - sciatic- result of damage to plexus or its nerves

Answer 3

Inability to extend hip and flex knee; sciatica

Question 4

Sacral- common fibular( superficial and deep branches) - body area served

Answer 4

Lateral aspect of leg and foot

Question 5

Sacral- common fibular( superficial and deep branches) - result of damage to plexus or its nerves

Answer 5

Footdrop- inability to dorsiflex foot

Question 6

Sacral- tibial( including Sural and plantar branches)- body area served

Answer 6

Posterior aspect of leg and foot

Question 7

Sacral- tibial( including Sural and plantar branches)-result of damage to plexus or its nerves

Answer 7

Inability to plantar flex and invert foot; shuffling gait

Question 8

Sacral- superior and inferior gluteal- body area served

Answer 8

Gluteus muscles of hip

Question 9

Sacral- superior and inferior gluteal- result of damage to plexus or its nerves

Answer 9

Inability to extend hip ( Maximus) or abduct and medially rotate thigh ( Medius)