Final- Regional Neuroanatomy Part 2 Flashcards
What plexuses provide motor and sensory innervation for the pelvis and lower limbs?
- Lumbosacral plexus
- Lumbar plexus (superior)
- Sacral plexus (inferior)
What spinal nerves contribute to the lumbosacral plexus?
- Spinal Nerves L1 to S4.
What spinal nerves contribute to the lumbar plexus?
- Spinal Nerves L1 to L4
What spinal nerves contribute to the sacral plexus?
- Spinal Nerves L4 to S4.
What are the 6 nerves that make up the lumbar plexus?
- Iliohypogastric nerve (L1)
- Ilioinguinal nerve (L1)
- Genitofemoral nerve (L1-L2)
- Lateral cutaneous nerve of the thigh (Lateral femoral cutaneous) (L2-L3)
- Obturator nerve (L2-L4)
- Femoral nerve (L2-L4)
What is the largest diameter nerve in the lumbar plexus?
- Femoral nerve
What are the 3 superior pelvic nerves?
- Iliohypogastric nerve
- Ilioinguinal nerve
- Genitofemoral nerve
What muscle do the 3 superior pelvic nerves originate (come out of/through) from?
- Psoas major muscle
The Iliolhypogastric nerve will provide sensory innervation to what parts of the body?
- Small part of the lateral pelvis/hip through the lateral cutaneous branch
- Anterior portion of the reproductive system through the anterior cutaneous branch
What muscles will have motor innervation through the iliohypogastric nerve?
- Transverse abdominis (may be utilized when breathing under labor/stress)
- Internal abdominis muscles
The Ilioinguinal nerve will provide sensory innervation to what parts of the body?
- Medial upper quadricep muscle
- Right above the reproductive organs
What muscles will have motor innervation through the ilioinguinal nerve?
- Internal oblique muscle
The genitofemoral nerve branches off into what two nerves branches?
- Femoral branch
- Genital branch
What muscles in men will have motor innervation through the genitofemoral nerve?
- Cremaster muscle/ Reflex
What ligament is attached to the pubic tubercle?
- Inguinal Ligament
What are two attachment points for the inguinal ligament?
- Anterior Superior Iliac Spine (ASIS)
- Pubic Tubercle
A horizontal line across the iliac crest will indicate what landmark on the spine?
- Above - The border between L3 and L4
- Below - The border between L4 and L5
What are the muscles that make up the femoral triangle?
- Iliopsoas
- Sartorius
- Pectineus
- Adductor Longus
Describe the position of the femoral nerve, femoral artery, and femoral vein in the femoral triangle.
- Femoral Nerve: Lateral
- Femoral Artery: Middle
- Femoral Vein: Medial
These structures are about 1 cm apart from each other.
What wraps around the femoral nerve, artery, and vein?
- Femoral sheath
What nerve is responsible for the sensory innervation of the lower leg?
- Saphenous Nerve
Saphenous Nerve is branched off the femoral nerve
The adductor canal is between what two muscles?
- Anterior and medial thigh muscles
- The adductor canal is also inferior to the femoral triangle.
What are the three muscles that surround the adductor canal?
- Sartorius
- Adductor Longus
- Vastus Medialis
What does the adductor canal provide a pathway for?
- Pathway for the saphenous nerve to pass through.