Hip and Lumbar Nerves What muscles Innervated/Path/Root

Question 1

Femoral
Root
Path
Muscle Supply

Answer 1

Root= L2-L4
Path= Under inguinal ligament through femoral triangle
Supplies= Motor innervation to anterior muscle quadriceps and sensory to anterior medial thigh
Innervate= Pectineus, Rectus Femoris, Satorius, Vastus Lateralis, Vastus Medialis, Vastus Intermedialis, Iliacus

Question 2

Saphenous
Root
Path
Muscle Supply

Answer 2

Branches off the femoral nerve
Root= L2-L4
Last cutaneous branch
Supplies= anteromedial knee, leg, foot

Question 3

Clunial
Root
Path
Muscle Supply

Answer 3

Superior root= L1-L3
Middle Root= S1-S3
Posterior root = S2-S3
-Arises directly from spinal nerves, supplies skin of buttocks, three different branch regions
-Superior supplies skin overlying superior and central parts of butt
-Middle supplies skin of medial buttocks and intergluteal cleft
-Inferior supplies skin inferior butt

Question 4

Superior Gluteal
Root
Path
Muscle Supply

Answer 4

Root= L4-S1
- Arises from lumbosacral plexus through greater sciatic notch–> passes superior to piriformis
- Muscle supply= Glute Medius, Glute Minimus, TFL

Question 5

Inferior Gluteal
Root
Path
Muscle Supply

Answer 5

Root= L5- S2
- Exits pelvis though greater sciatic foramen–> deep to piriformis
-Muscle Supply= Gluteus Maximus

Question 6

Sciatic
Root
Path
Muscle Supply

Answer 6

Root= L4-S3
- exits pelvis via greater sciatic foramen–> inferior tp piriformis
- Supplies muscles of posterior thigh, skin of leg/foot
-Muscle supply= Adductor magnus Hamstring part of tibial part of sciatic, Semitendinosus tibial division, Semimembranosus tibial division, Biceps femoris; long head tibial division; short head common fibular division

Question 7

Nerve to Quadratus Femoris
Root
Path
Muscle Supply

Answer 7

Root= L4-S1
- Exits pelvis through greater sciatic foramen–> inferior to piriformis
-Muscle supply= Quadratus femoris, Inferior Gemellus

Question 8

Nerve to Obturator Internus
Root
Path
Muscle Supply

Answer 8

Root= L5-S2
-Exists pelvis through greater sciatic foramen–> inferior to Piriformis
-Muscle supply= Obturator Internus, Superior Gemellus

Question 9

Obturator Nerve
Root
Path
Muscle Supply

Answer 9

Root= L2-L4
- Arises anterior rami of L2-L4 of lumbar plexus–> enters lesser pelvis –> along lateral wall of pelvis to obturator canal
- Enters thigh and divides into anterior and posterior
- Supply medial thigh muscles
- No pelvic structures are supplied by obturator nerve
-Muscle supply= Adductor magnus adductor part supplied by obturator nerve posterior division, Obturator Externus, Adductor longus/ Adductor Brevis obturator anterior division, Gracilis

Question 10

Posterior Femoral Cutaneous
Root
Path
Muscle Supply

Answer 10

Root= S1-S3
- Exits pelvis through greater sciatic foramen–> inferior to piriformis
- Supplies posterior thigh/ proximal leg

Question 11

Pudendal
Root
Path
Muscle Supply

Answer 11

Root= S2-S4
-Exits pelvis through greater sciatic foramen–> inferior to piriformis –> re-enter in lesser sciatic notch
- Supplies Genital structures

Question 12

Subcostal Nerve
Root
Path
Muscle Supply

Answer 12

Root= T12
- Under 12th rib
- Supplies skin to anterior lateral abdominal wall
- Muscle supply= External Oblique

Question 13

Iliohypogastric/Ilioinguinal
Root
Path
Muscle Supply

Answer 13

Root= iliohypogastric T12-L1; Ilioinguinal L1
- Runs anterior to quadratus lumborum and superior/parallel to iliac crest–> Then pierces transverse abdominus near ASIS and run through internal and external obliques to supply abdominal wall

Question 14

Nerve to Piriformis
Root
Path
Muscle Supply

Answer 14

Root= S1-S2
-Supplies Piriformis Muscle

Question 15

Nerve to Levator Ani and Coccygeus
Root
Path
Muscle Supply

Answer 15

Root= S3-S4
-Distribution to levator Ani and coccygeus muscles

Question 16

Genital Femoral Nerve
Root
Path
Muscle Supply

Answer 16

Genital Root= L1
Femoral=L2
- Nerve pierces Psoas Major and runs inferiorly on anterior surface
- It then breaks off into 2 branches lateral to common & External iliac arteries
- Genital Branch supplies the genitals
- Femoral Branch goes to supply sensation to upper anterior thigh/groin area