Nerves - Lumbosacral plexus

6 important questions on Nerves - Lumbosacral plexus

What are the three components of the lumbosacral plexus?

1. Femoral nerve: Motor to quadriceps femoris group
2. Obturator nerve: Motor to medial adductor muscles
3. Sciatic nerve: Motor to caudal thigh muscles

What region of the spine does the lumbosacral plexus innervate?

L4-L7, and S1-S2/3

What region of the spine does the femoral nerve innervate?

L4-L6, passes through the iliopsoas muscles and innervates muscles that extend the stifle. It is necessary for weight bearing
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

What region of the spine does the obturator nerve innervate?

L4-L6, passes through the obturator foramen and innervates medial adductor muscles (e.g. Gracilis) it is necessary to adduct legs

What region of the spine does the sciatic nerve innervate?

L6/7-S2, it is the largest nerve of the lumbosacral plexus, it passes caudal to acetabulum via the greater sciatic foramen and it innervates caudal thigh muscles (e.g. Biceps femoris) and muscles distal to stifle.

Where is the lumbosacral plexus relative to the acetabulum?

Cranial: Femoral nerve
Medial: Obturator nerve
Caudal: Sciatic nerve

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo