Flashcards in nerves of abdomen Deck (11):
Where are the postganglionic SNS fibers located?
- walls of the organs (short)
What type of nerves are the pelvic nerves?
- contribute formation pelvic plexus
- only splanchnic nerves carry PNS
What structures does the pelvic nerves supply?
- descending colon
- sigmoid colon
- viscera in pelvis and perineum
What comprises the hypogastric plexus?
- ascending fibers - PNS fibers
- descending fibers - SNS fibers
- fibers synapse and follow BV
Lateral femoral cutaneous nerve
- emerges from lateral side of psoas muscle
- runs from in front of iliacus and behind inguinal ligament
- innervates skin of anterior and lateral thigh
- emerges on the front of psoas muscle
- descends on anterior surface of psoas
- divides genital and femoral branch
What does the genital branch of the genitofemoral nerve innervate?
- enters inguinal canal through deep inguinal ring to reach spermatic cord
- supplies cremaster muscle of scrotum
What does the femoral branch of the genitofemoral nerve innervate?
- supplies the skin of the femoral triangle
- arises from 2nd, 3erd, 4th lumbar nerves
- descends along medial border of psoas muscle
- runs forward on lateral wall of pelvis and enters thigh through obturator foramen
- divides into anterior and posterior branches
What do the anterior and posterior branches of obturator nerve innervate?
- innervates adductor group of muscles
- hip, knee joints
- skin on medial side of thigh