Abdominal Wall Flashcards
Name the five components of the body wall from outside inward.
Skin, cutaneous trunci, superficial fascia, deep fascia/muscle, peritoneum
What are abdominal muscles covered in?
Deep fascia
How can muscles be attached to bone?
Tendons, aponeurosis
Where does the linea alba run to?
From the sternum to the pelvic bone
How does the rectus abdominus muscle lay?
From sternum to pelvic bone with tendenous transverse insertions, fibers run cranio-caudally
What three pairs of muscles make up the lateral abdominal wall?
External abdominal oblique, Internal abdominal oblique, transverse abdominus
Describe the external abdominal oblique muscle.
Runs caudo-ventral, inserts to linea alba via aponeurosis, most superficial of the lateral abdominal muscles
Describe the internal abdominal oblique muscle.
Runds cranio-ventral, inserts to linea alba and caudal ribs via aponeurosis, middle muscle of the three lateral abdominal wall muscles
Describe the transverse abdominus muscle.
Runs dorso-ventral, inserts at linea alba, only present in cranial/mid portions of abdomen
How do each of the muscle layers of the lateral abdominal wall pass by the rectus abdominus muscle?
External ab. ob.: Superficial, most ventral
Internal ab. ob.: Starts cranially surrounding the rectus abdominus, around umbilicus moves to just superficial
Transverse ab.: Deep to rectus abdominus then switches to superficial, then disappears
What do the aponeuroses of the lateral abdominal muscles form around the rectus abdominus muscle?
Rectus sheath
Where is the superficial inguinal ring located?
In the external abdominal oblique muscle
Where is the deep inguinal ring located?
In the internal abdominal oblique muscle
What is the name of the peritoneum that is dragged between the superficial and deep inguinal rings?
Vaginal tunic
What two vessels/nerve are included in the canine inguinal canal?
External pudendal vein/artery, genitofemoral nerve
