Abdominal & Pelvic Anatomy Flashcards
What structures form the boundary of the femoral triangle?
1) Sartorius (laterally); 2) Adductor longus (medially); 3) Inguinal Ligament (superiorly); 4) Iliopsoas (lateral floor); 5) Pectineus (medial floor)
What is the mnemonic for the borders of the femoral triangle?
SAIL:
S - sartorius
A - adductor longus
I - inguinal…
L - ligament
What forms the lateral border of the femoral triangle?
Sartorius
What forms the medial border of the femoral triangle?
Adductor longus
What forms the superior border of the femoral triangle?
Inguinal ligament
What structures form the floor of the femoral triangle?
Pectineus and iliopsoas
What structures pass through the femoral triangle?
Femoral nerve, artery and vein
Which nerve supplies gluteus maximus?
Inferior gluteal nerve
What is the blood supply of gluteus maximus?
Superior and inferior gluteal artery
What is the action of gluteus maximus?
Extension and external rotation of the hip
What is the insertion of gluteus maximus?
Ischial tuberosity
Iliotibial band
What is the origin of gluteus maximus?
Posterior gluteal line of inner upper ilium
Posterior surface of lower sacrum
Lumbodorsal fascia
Sacrotuberous ligament
What structures form the rectus sheath?
Aponeurosis’s of transversus abdominis, external oblique and internal oblique
Which is deeper, scarpa’s or camper’s fascia?
Scarpa’s
What is the anatomy of rectus sheath above the arcuate line?
Aponeurosis’s of external oblique and the anterior lamellae of the aponeurosis of internal oblique pass anterior
The posterior lamellae of the aponeurosis of internal oblique and aponeurosis of transversalis fascia pass posterior
What is the anatomy of the rectus sheath below the arcuate line?
Aponeurosis of external oblique and internal oblique pass anterior
Aponeurosis of transversalis fascia pass posterior
What does the right ovarian vein empty into?
IVC
What does the left ovarian vein empty into?
Left renal vein
Which artery supplies the foregut?
Coeliac trunk
Which artery supplies the midgut?
Superior mesenteric
Which artery supplies the hindgut?
Inferior mesenteric
What are the branches of the coeliac trunk?
1) L gastric artery
2) Splenic artery
3) Common hepatic artery
What structures does the foregut form?
Mouth to the duodenum
At what level does the abdominal aorta bifurcate into the common iliac vessels?
L4
What are the terminal branches of the abdominal aorta?
Right common iliac
Left common iliac
Median sacral artery
What structures form the perineal body?
External anal sphincter
Transverse perineal muscles
Bulbocavernosus muscle
Levator ani muscle
What is the anatomical location of the deep inguinal ring?
Midpoint of the inguinal ligament
How is the midpoint of the inguinal ligament found?
Midpoint between ASIS and the pubic tubercle
What is the anatomical location of the superficial inguinal ring?
Just above and just lateral to the pubic tubercle
What passes through the inguinal canal in females?
Round ligament
What passes through the inguinal canal in males?
Spermatic cord
What structure passes through the superficial inguinal ring only, NOT the deep inguinal ring?
Ilioinguinal nerve
What are the boundaries of the inguinal canal?
Anterior - aponeurosis of external oblique
Posterior - transversalis fascia
Superior - internal oblique
Inferior - inguinal ligament
What is the anterior boundary of the inguinal canal?
Aponeurosis of external oblique
What is the posterior boundary of the inguinal canal?
Transversalis fascia
What is the superior boundary of the inguinal canal?
Internal oblique
What is the inferior boundary of the inguinal canal?
Inguinal ligament
What is the lymphatic drainage of the vagina?
Superior - internal iliac LNs
Inferior = superficial inguinal LNs
What is the transverse diameter of the pelvis?
13cm
Which arteries supply the ovary?
Ovarian and uterine arteries
What is the mediAL umbilical ligament a remnant of?
Remnant of fetal umbilical arteries
What is the mediAN umbilical ligament a remnant of?
Remnant of urachus
What innervates the testes?
T10 and spermatic plexus
What is the inferior border of the deep perineal pouch?
Perineal membrane
What is the superior border of the deep perineal pouch?
Superior fascia of the urogenital diaphragm
What separates the deep and superficial pouches?
Perineal membrane
What is the contents of the deep perineal pouch?
Deep transverse perineal muscle
External sphincter muscle of urethra
Compressor Urethrae Muscle (female)
Urethrovaginal Sphincter (female)
Membranous portion of the urethra (males)
Proximal portion of urethra (females)
Bulbourethral gland (males)
Where in the brain is the hypothalamus located?
Diencephalon
What is meralgia paraesthetica?
Entrapment of the lateral cutaneous nerve of the thigh
How does the round ligament leave the pelvis?
Deep inguinal ring
What reinforces the inguinal canal posteriorly?
Conjoint tendon
Which vessels exit the pelvis via the greater sciatic foramen?
Superior gluteal artery
Inferior gluteal artery
Internal pudendal artery
Which vessel exits the pelvis via the greater foramen and then re-enters through the lesser sciatic foramen?
Internal pudendal artery
What causes entrapment of the femoral nerve in pregnancy?
Fetal pressure in a difficult birth
What are the consequences of femoral nerve entrapment?
Sensory loss to the anterior thigh and knee
Quariceps weakness, loss of knee jerk
What causes entrapment of the lateral femoral cutaneous in pregnancy?
Pregnancy (in general)
What are the consequences of lateral femoral cutaneous nerve entrapment?
Sensory loss to the lateral thigh
What causes entrapment of the common peroneal nerve nerve in pregnancy?
Due to compression to the lateral head of fibula - occurs in leg bars
What are the consequences of common peroneal nerve nerve entrapment?
Sensory loss to the foot and anterolateral leg
Foot-drop
What causes entrapment of the obturator nerve in pregnancy?
Compression between the head of the fetus and the bony structures of the pelvis
What are the consequences of obturator nerve entrapment?
Sensory loss to the upper medial thigh
Weakness to leg adduction
What is the True (lesser) pelvis?
Inferior to the pelvic brim, contains the bladder, colon and reproductive organs
What is the False (greater) pelvis?
Superior to the pelvic brim, supports organs of the lower abdomen and the gravid uterus
What separates the true and false pelvis?
Pelvic brim
What divides the pelvis into anterior and posterior compartments?
Vagina
How many lobules in each testes?
250-400