Anatomy - Lumbosacral Nerves

Question 1

What is the nerve root for the sciatic nerve?

Answer 1

L4-S3

Question 2

where does the sciatic nerve run through?

Answer 2

The greater sciatic foramen and by the piriformis

Question 3

What ligaments make up the greater sciatic foramen?

Answer 3

Sacrospinous

Sacrotuberous

Question 4

What does the sciatic nerve become and what do these nerves do?

Answer 4

Tibial

1. Hamstrings
2. Plantar Foot
3. Posterior leg

Common Peroneal - SH biceps

1. Deep peroneal - Dorsiflextion and big web space
2. Supercifial peroneal - eversion and dorsifoot sensation

Question 5

What is the nerve root for the obturator nerve and where does it run?

Answer 5

L2-L4. Around the pelvic brim and through the obturator foramen

Question 6

What does the obturator nerve do?

Answer 6

Gracilis

Adductors of hip

Media thigh sensation

Question 7

What is the nerve root of the femoral nerve and where does it run?

Answer 7

L2-L4. Deep to inguinal ligament

Question 8

What does the femoral nerve do?

Answer 8

Quads - Knee extensors

Question 9

What is the nerve root of the pudendal nerve and where does it run?

Answer 9

S2-S4. Through greater sciatic foramen and Alcocks Canal

Question 10

What does the pudendal nerve do?

Answer 10

External anal and urethal sphincter

External genitalia

Perineum and anal sensation

Question 11

What are the hip flexors?

Answer 11

Psoas major

Iliacus

Tenso fascia lata

pectineus

Quads

Question 12

What are the hip extensors?

Answer 12

Hamstrings

Gluteus maximus

Question 13

What does the coccygeal plexus do?

Answer 13

Joins with sacrum to form coccygeal nerve - sensation around coccyx