Lecture 46 - Ungulate ALT Flashcards
what are the muscles of the abdominal wall (outermost to innermost)
- external abdominal oblique
- internal abdominal oblique
- transversus abdominis
- rectus abdominis
describe the external abdominal oblique
- caudoventral
- Dorsocaudal corner has prominent cranial br of deep circumflex iliac a.
- contains the elastic abdominal tunic
what is the elastic abdominal tunic
elastic modification of deep fascia covering the surface of the EAI and providing additional passive support to the abdominal wall
describe the internal abdominal oblique
- cranioventral
- covers paralumbar fossa
- ruminant has dorsal and ventral part
describe transversus abdominis
- vertical fibers
- ventral branches of spinal nerves on surface
- in ox, dorsal end is aponeurosis
describe rectus abdominis
- craniocaudal
- enveloped in the aponeurotic sheaths of EAO, IAO, and TA
linea alba
ventral midline fusion of the rectus sheath
where is the ideal location for a midline celiotomy
linea alba
for a ventral midline celiotomy what layers are cut through
- skin
- SQ tissue
- linea alba
- retroperitoneal fat
- peritoneum
for a paramedian incison, what layers are cut through
- skin
- SQ tissue
- external rectus sheath
- rectus abdominis mm.
- internal rectus sheath
- retroperitoneal fat
- peritoneum
for a laparotomy, what layers are cut through
- skin
- SQ tissue
- EAO
- IAO
- transversus abdominis
- peritoneum
What layers are closed in a laparotomy? why?
- TA/IAO layers
- EAO
- skin
- maybe SQ
minimizes dead space and maximize anatomical healing and strength of closure
what is the peritoneum
single, continuous serous lining of the abdominal cavity and its viscera
what is the omentum
dorsal = dorsal stomach to dorsal body wall
ventral = ventral stomach to liver and ventral body wall
the rumen, reticulum, and abomasum develop from the
dorsal stomach
the omasum and part of the abomasum develop from the
ventral stomach
what is the omental bursa
separate space from general peritoneal cavity and the two spaces communicate via the epiploic foramen
the superficial wall of the greater omentum connects to
left longitudinal groove of the rumen
the deep wall of the greater omentum connects to
right longitudinal groove of the rumen
cranially, the superficial and deep walls connect to
cranial groove of the rumen and greater curvature of the abomasum
caudally, the superficial and deep walls connect to
continuous from caudal groove of the rumen and create a caudal fold
in the ruminant, the lesser omentum connects to
lesser curvature of the abomasum and surface of omasum to the liver
T/F: the omentum is less developed in the horse and pig
TRUE
what are the boundaries of the epiploic foramen
- caudate process of the caudate liver lobe
- portal v.
- gastropancreatic/hepatoduodenal fold
epiploic foramen entrapment
- causes small intestine strangulating obstruction
- SI passes left to right
- risk factors = cribbing, increased height, colic hx
which of the following statements is correct?
a. the liver develops in the mesentery that later becomes the GO
b. the mental bursa is the potential space between the deep and superficial walls of the GO
c. the supraomental recess of the ruminant is enter via the epiploic foramen
d. the less omentum attaches to the spleen
b. the mental bursa is the potential space between the deep and superficial walls of the GO
