Lumbosacral Plexus Flashcards
Femoral Nerve Supplies?
anterior thigh
Obturator Nerve supplies?
medial thigh
Sciatic Nerve supplies?
posterior thigh
What spinal nerves form Lumbar plexus?
L1-L4
What are the nerves of the lumbar plexus that you need to know?
Lateral cutaneous nerve
Femoral nerve
Obturator nerve
lumbosacral trunk
Spinal nerves of lateral cutaneous nerve?
L2-L3
Spinal nerves of femoral nerve?
L2-L4
Spinal nerves of obturator nerve?
L2-L4
Spinal nerves of lumbosacral trunk?
L4-L5, joins sacral plexus
Innervation of Obturator nerve?
Motor to all muscles in medial thigh and obturator externus
Sensory to skin over upper medial aspect of thigh
Innervation of Femoral nerve?
Motor to all muscles in anterior thigh
Motor to iliacus and pectineus
Sensory to skin of anterior thigh, anteromedial knee, medial side of leg and medial side of foot
Innervation of Lateral cutaneous nerve?
sensory innervation to skin on anterior and lateral aspect of thigh
What are the nerves of the sacral plexus that you need to know?
Tibial Nerve
Superior gluteal nerve
Inferior gluteal nerve
Common fibular nerve
What spinal nerves form Sacral plexus and location?
L4-S4
Forms on posterior wall of pelvis
Most nerves exit via greater sciatic foramen
Spinal nerves of Tibial nerve?
Anterior división of sciatic nerve
L4-S3
Spinal nerves of Superior gluteal nerve?
L4-S1
Spinal nerves of Inferior gluteal nerve?
L5-S2
Spinal nerves of common fibular nerve?
Posterior division of sciatic nerve
L4-S2
innervation of superior gluteal nerve?
Gluteus medius & minimus
tensor fasciae latae muscles
Innervation of inferior gluteal nerve?
gluteus maximus muscle
Sciatic nerve composed of what 2 nerves and where do they split?
Tibial nerve (anterior)
Common fibular nerve (posterior)
Sciatic nerve splits near popliteal fossa
Sciatic nerve supplies?
Posterior thigh muscles, all leg and foot muscles, skin of most of leg and foot
Innervation of Tibial Nerve?
Motor to posterior thigh muscles, posterior leg muscles, muscles of sole of foot
Sensory to skin on plantar aspect of foot
Tibial nerve splits into?
Medial plantar nerve
Lateral plantar nerve
What are the two cutaneous branches of Tibial nerve?
Medial sural cutaneous nerve
Sural Nerve
Innervation of Common fibular nerve?
Motor to muscles of lateral leg (evertors) via superficial fibular branch
Motor to muscles in anterior of leg and forum of foot via deep fibular branch
Sensory to skin on lateral aspect of inferior half of leg and between hallux and 2nd toe
Common fibular nerve splits into?
Superficial fibular nerve
Deep fibular nerve
