Nerves of lower limb

What does T1-T12 merge together to form?

Plexuses

What form cervical plexus?

C1-C4

What form brachial plexus?

C5-T1

What form Lumbar plexus?

T12-L4

What form Sacral plexus?

L4-S4

What place do we not have plexuses in?

intercostal (T1-T12)

What is nerve plexuses?

intermingling of nerve cell processes (highway interchange)

What plexuses are associated with lower limbs?

Lumbar and sacral plexus

What does nerve plexus go through to get to the target?

Peripheral nerve

Where does the lumbar plexus merge?

anteriorly in false pelvis

Where does the sacral plexus merge?

Posteriorly in true pelvis

What nerve will you find in lumbar plexus?

anterior Femoral and obturator n

What levels are the femoral and obturator n?

L2-L4

What is the femoral n superficial to?

iliacus m

Femoral n. runs deep to _____ to enter anterior thigh

inguinal ligament

Femoral n is most _____ of femoral triangle

lateral

What does femoral n. innervates?

all muscles of anterior thigh, iliacus m, and half of pectineus m

What does obturator n runs medial to?

psoas major m

What does the obturator n pass through?

obturator foramen

What does the obturator n innervates

All medial thigh muscles

What is blue

Obturator n

What is pink

Femoral n

What nerves are in the sacral plexus?

Superior and inferior gluteal, common fibular, deep fibula, superficial fibular, tibial, and sciatic n

Whats the level of superior gluteal n?

L4-S1

What does the superior gluteal n exit through?

Greater sciatic foramen

Where is the superior gluteal n located?

Superior to piriformis m

What does superior gluteal n innervates?

gluteus medius, minimus, and tensor fasciae latae m

Whats the level of Inferior gluteal n

L5-S2

Where does inferior gluteal n exit?

Great sciatic foramen

Where is inferior gluteal n located?

inferior to piriformis m

What does inferior gluteal n innervates?

Gluteus maximus m

Whats the level of sciatic and tibial n?

L4-S3

Where sciatic nerve exit through?

great sciatic foramen

Where is the sciatic n located?

inferior to piriformis m

What does sciatic n split up (bifurcates) into?

tibial and common fibular n

Whats the level of common fibular n?

L4-S2

What division is tibial n to sciatic n?

medial

What does tibial n innervates?

posterior thigh m (except biceps, femoris, short head m) and all posterior leg m

What does the tibial n run with to get into the foot?

Tom, Dick, and Harry

What does the tibial n split (bifurcates) into

medial and lateral plantar n

Where does the plantar n split occur?

deep to abductor hallucis m

What does the medial plantar n innervates?

abductor hallucis m and flexor digitorum brevis m

What does the lateral plantar n innervates?

abductor digiti minimi m

Whats the division of common fibular n to sciatic n?

lateral

What does the common fibular n wraps around

neck of fibula

What does common fibula n split (bifurcates) into?

Superficial and deep fibular n

What does the common fubular n innervates?

only biceps femoris short head m

What division is the superficial fibular n to common fibular n?

Lateral

What does the superficial fibular n run between?

Fibularis longus and fibularis brevis m

Why does superficial fibular n continue into dorsum of foot?

cutaneous (sensory) innervation

What does superficial fibular n innervates?

Both lateral leg m

What division is the deep fibular n to the common fibular n?

medial

What does the deep fibular nerve travel between?

tibialis anterior m and extensor hallucis longus m

Why does deep fibular n continue into dorsum of foot?

cutaneous (sensory) innervation for “flip-flop” area only (area between big tow and 2nd toe)

What does deep fibular n innervates?

All anterior leg m and both m of dorsum of foot

Foot drop is when ____ is damage

Common fibular n

What does foot drop affect?

lateral and anterior compartments

What’s another name for foot drop?

Steppage gait

Damage to deep fibular n would mean that patient aren’t able to

Dorsiflex ankle and extension of digits

Damage to superficial fibular n would mean that patient aren’t able to

evert the foot

What is 1

Superior gluteal n

What is 2

Inferior gluteal n

What is 3

Sciatic n

What is 4

Common fibular n

What is 5

Tibial n

What is 6

Deep fibular n

What is 7

Superficial fibular n