Horse Abdomen Lecture Flashcards
EAO
-Slit in aponeurosis forms
Superficial inguinalring
EAO musculotendinous junction
Heave line
When horse has “heaves” EAO can become hyperatrophied because it is used so much to help expire air
EAO
->Caudal edge is known as
Inguinal ligament which forms caudal boundary of deep inguinal ring
What covers EAO
Tunica flava abdominis
IAO
-hump
Formed by projecting tuber coxae (origin of IAO) and creates caudal boundary of paralumbar fossa
IAO
-deep inguinal ring
Forms cranial boundary of deep inguinal ring
IAO
-caudal fibers
Caudal fibers give rise to cremaster muscle
IAO
-heave line
Will not see heave line in IAO
Paralumbar fossa boundaries
Dorsal=epaxial muscles
Cranial=18th rib
Caudal=”hump” formed by IAO
Rectus abdominis
- Linea alba
- Attaches?
- Deep inguinal ring
- Linea alba situated btw R and L rectus abdominis
- Attaches pubis by prepubic tendon
=Forms ventral boundary of deep inguinal ring
Transversus abdominis
- How to ID
- Deep inguinal ring
Has ventral branch of lumbar n on surface (how to ID)
IS NOT A PART OF THE DEEP INGUINAL RING
What makes it difficult for a horse to swallow?
Acute angle that the esophagus enters stomach and heavily muscled cardiac sphincter. Most of the time the contents of stomach are pushed into saccus cecus of stomach.
Where is cardia of stomach?
Around 11th rib
Does the stomach touch the abdominal wall?
NO
Saccus cecus
Enlarged portion of the fundus
Margo plicatus
Separates glandular from non-glandular part of stomach
Describe cranial part of duodenum
S-shaped and called sigmoid flexure
Where is base of cecum?
In R paralumbar fossa
Contents flow into cecum how?
Out of cecum?
Into-ileocecal orifice
Out-Cecocolic orifice
Pathway of ascending colon from cecum
Right ventral colon Sternal flexure (ventral diaphragmatic) Left ventral colon Pelvic flexure Left dorsal colon Diaphragmatic flexure (dorsal diaphragmatic) Right dorsal colon
NOW IN TRANSVERSE COLON
Give bands and sacculations of large intestine
Cecum
4 bands
+ sacculations
Ventral colon
4 bands
+ sacculations
Left dorsal colon
1 band
- sacculations
Right dorsal colon
3 bands
- sacculations (+)
Transverse colon
2 bands
- sacculations (+)
Descending colon
2 bands
+sacculations
Where are impactions likely to occur in large intestine?
Where there is a change in direction or change in diameter
Boundaries of epiploic foramen
Dorsal= caudal venca cava and caudate process of liver
Ventral= pancreas and portal v
Cranial= hepatoduodenal ligament
Important ligaments on spleen
Renosplenic ligament
Phrenicosplenic ligament
Left dorsal displacement of descending colon
Over dorsal aspect of spleen w/entrapment btw renosplenic ligament, spleen, and left kidney
What kidney can be palpated per rectuM
L
Shapes of kidneys
Heart shaped=R
Bean shaped=L
Pelvis contains
Mucous glands
Terminal recesses are extensions of
Renal pelvis
Verminous aneurisms seen
Celiac and cranial mesenteric a
Arteries in cecum
Lateral and medial cecal
Ventral colon is supplied by
Colic branch of ileocolic
Dorsal colon is supplied by
right colic a
