Anterior, Abdominal Wall Flashcards
What are the 6 layers of the abdominal wall in order from outside to inside the abdomen?
- Skin
- Superficial Fascia
- superficial fatty = Camper’s Fascia
- deep MEMBRANOUS = Scarpa’s Fascia - MUSCLES
- External Oblique
- Internal Oblique
- Transversus Abdominus
- -Rectus Abdominus, Pyramidalis, Cremaster - Transversalis Fascia
- Extraperitoneum
- Peritoneum
What does Camper’s Fascia become in the scrotum? What is Scarpo’s Fascia continuous with?
- Campers –> Darto’s Muscle
- (Super Fat Camper, Darts away*) - Scarpo –> continuous with Colles’ Fascia –> of the perineum
What is the fatty layer of fascia in the abdomen? The membranous?
fatty = Camper’s Fascia
Membranous = Scarpo’s
Which layer of fascia disappears in the scrotum and why?
Camper’s Fascia (fatty)
Testes cannot function if the temperature is above 37 degrees (testes hang in a bag scrotum) = NO FAT because of this
What two bony structures of the pelvis does the inguinal ligament attach to?
Inguinal Ligament stretches between
Anterior superior iliac Spine &
pubic tubercle
What muscle provides the LOW arching fibers for Cremaster?
What nerve innervates the Cremaster muscle? Where doe this muscle insert upon?
- INTERNAL oblique
- Genital Branch of Genitofemoral Nerve
- Pubic tubercle
What 2 muscles are the components of the Rectus Sheath? (not the aponeurosis itself)
What 2 vessels?
Rectus Abdominus & Pyramidalis
Superior & Inferior Epigastric Vessels
Describe the anterior/posterior layer of the rectus sheath ABOVE the arcuate line & BELOW
ABOVE
- anterior = external oblique muscle & 1/2 internal oblique
- posterior = transversalis abdominaux & 1/2 internal oblique
BELOW
- anterior = 1. external 2. internal oblique 3. transversals muscle
posterior = transversalis FASCIA lining the Rectus Abdomens Muscle
What 3 lines is the rectus abdominus related to?
- Linea Semilunaris
- Linea Alba
- Arcuate Line
The testes descend RETROPERITONEALLY. True or false?
TRUE
What is the name of the structure that:
- forms a path through the anterior abdominal wall for processus vaginalus
- ANCHORS the testis to the scrotum
- Guides the testis descent to the scrotum?
GUBERNACULUM TESTIS
What are the extensions of the following structures of the abdomen in the SCROTUM?
- Transversalis Fascia
- Internal Oblique
- External Oblique
- Internal Spermatic Fascia
- Cremaster Muscle (remember cremasteric reflex*)
- External Spermatic Fascia
What is the series membrane that covers the front & sides of the testis and was previously known as PROCESSES VAGINALIS
TUNICA VAGINALIS
What two muscles originate from the inguinal ligament?
Internal Oblique & Transverses Abdominus*
Where does the inferior epigastric artery gain access to the rectus sheath?
ARCUATE LINE
What are the two branches of internal thoracic artery?
Musculophrenic (lateral)
Superior EPigastric (medial)
The umbilicus is found at what dermatome? Which lumbar spine is it found at?
T10
but L4!!
What structure gives off the INFERIOR epigastric artery?
External Iliac Artery
What structures form the following boundaries of the inguinal canal?
- Anterior (2)
- Posterior (2)
- Roof (2)
- Floor (1)
- External Oblique & Internal
- Trasversalis FASCIA & Conjoint Tendon
- arch of Internal (LOW)
arch of Transverses Abd. (HIGH) - Inguinal Ligament
The transversals Fascia:
- Forms the ____ wall of the canal
- In the scrotum as_____
- Has the _____ inguinal ring.
- Posterior wall of canal (w/ Conjoint tendon)
- Internal Spermatic Fascia
- DEEP Inguinal Ring
The deep inguinal ring houses what 2 structures?
What muscles passes through the DEEP inguinal ring?
- Spermatic cord/round ligament
- Genital Branch of Genitofemoral
* CREMASTERIC MUSCLE
What are the structures that make up the 3 boundaries of the Inguinal Triangle/ Hesselbach’s?
- medial
- lateral
- inferior
- Medial: Linea Semilunaris of Rectus Abdominus
- Lateral:
Lateral Umbilical Fold by INFERIOR EPIGASTRIC - Inferior:
Inguinal Ligament (from anterior superior iliac spine to pubic symphysis)