Lecture 17: Lumbosacral Plexus (Hip, Thigh) Flashcards
1
Q
superior cluneal nerves
A
- L1-L3
- sensory to skin of superior buttock
2
Q
middle/medial cluneal nerves
A
- S1-S3
- sensory to skin of sacrum/anus and adjacent buttock
3
Q
inferior cluneal nerves
A
- S2 and S3
- sensory to skin of inferior buttock (over glute max)
4
Q
Posterior Cutaneous Nerve to Thigh
A
- S1-S3
- sensory to skin of inferior buttock, posterior medial thigh, posterior popliteal fossa
5
Q
Pudendal n.
A
- S2-S4
- supplies organs in perineum
6
Q
sciatic n.
A
- L4-S3
- contains both tibial and fibular nerves
7
Q
what structures are innervated by the tibial nerve?
A
- hamstrings
- post calf area
- plantar surface of foot
8
Q
what structures are innervated by the fibular nerve?
A
- lateral compartment
- fibularis muscles
- anterior compartment (extensor muscles)
9
Q
superior gluteal n.
A
- L4-S1
- posterior division nerve
- motor to gluteal muscles and TFL
- comes out of greater sciatic foramen with sciatic n.
10
Q
inferior gluteal n.
A
- L5-S2
- posterior division nerve
- motor to glute muscles and TFL
- also comes out of greater sciatic foramen
11
Q
Nerve to Quadratus Femoris
A
anterior division nerve to lateral rotator muscles
12
Q
Nerve to Obturator Internus
A
anterior division nerve to lateral rotator muscles
13
Q
femoral n.
A
- L2-L4
- posterior division nerve
- goes through the pelvic cavity (base of iliac fossa) and subinguinal space
- supplies quads, sartorius, iliacus, half of pectineus
14
Q
obturator n.
A
- L2-L4
- anterior division nerve
- runs with femoral
- branches off at the ilium and goes through obturator foramen
- supplies obturator externus, adductor longus/brevis, ant part of adductor magnus, gracilis, and half of pectineus
