Download MBBS (Bachelor of Medicine, Bachelor of Surgery) Human Anatomy ppt lectures Topic 80 Stomach Notes. - anatomy ppt free download human anatomy ppt lectures, medicine notes ppt, anatomy handwritten notes pdf, mbbs 1st year anatomy notes pdf download, best anatomy notes pdf, human anatomy notes pdf, anatomy easy notes pdf, anatomy notes online, anatomy short notes, Anatomy ppt, Powerpoint Presentations and lecture notes.
Location
l Upper and left part of abdomen
l Epigastric, umbilical and left
hypochondrial region
Stomach
l In adult life, stomach located T10 and
L3 vertebral segment
l Can be divided into anatomic regions
based on external landmarks
l 4 regions
l Cardia
l Fundus
l Corpus (body)
l Antrum
Anatomy
l Cardia- region
just distal to the
GE junction
l Fundus- portion
above and to the
left of the GE
junction
Anatomy
l Corpus- region
between fundus and
antrum
l Margin not distinctly
external, has arbitrary
borders
l Antrum- bounded
distally by the
pylorus
l Which can be
appreciated by
palpation of a
thickened ring of
smooth muscle
shape
l Depends on degree of distension and
surrounding viscera
l Empty - J shape
l Partly distended - piriform
l Obese - horizontal - steer horn
stomach
size
l Distensible
l 10 in. long
Capacity
l 30 ml - birth
l 1 l - puberty
l 1 ? l ? 2 l or more - adult
External features
l Cardiac orfice -7th costal cartilage, T 11
vertebra
l Pyloric orifice - lowerborder of L 1
Pyloric constriction - circular groove
Pylorus = gate guard
PrePyloric vein in front of constriction
l Lesser curvature, lesser omentum, incisura
angularis
External features...
l Greater curvature, GO,GS,GP.
l cardiac notch
Anterior surface - forward upward
Posterior surface -backward downward
Sub divisions
l Cardiac ,Pyloric parts
Cardiac ? fundus , body
Pyloric ? pyloric antrum ( 3 in.), pyloric
canal(1 in.)
Relations
Peritoneal
l Lesser omentum
l Greater omentum
l Gastrosplenic ligament
l Gastrophrenic ligament
l Bare area
Relations.....
Visceral
l Anterior surface
Liver, diaphragm, ant. Abd.wall
l Posterior surface
Diaphragm, Lt. kidney, Lt. supra renal
gland, pancreas, transverse mesocolon,
splEnic flexure of colon, splenic artery -
stomach bed
Sromach Bed
Interior of stomach
l Gastric rugae
Longitudinal along lesser curvature ?
gastric canal, irregular elsewhere.
l Gastric pits
Gastric glands opens
Vasculature
l Well vascularized organ
l Arterial flow mainly derived from
Celiac Artery
l 3 Branches
lLeft Gastric Artery
lSupplies the cardia of the
stomach and distal esophagus
lSplenic Artery
lGives rise to 2 branches which
help supply the greater
curvature of the stomach
lLeft Gastroepiploic
lShort Gastric Arteries
lCommon Hepatic or Proper Hepatic
Artery
l2 major branches
lRight Gastric- supples a
portion of the lesser curvature
lGastroduodenal artery
-Gives rise to Right
Gastroepiploic artery
-helps supply greater
curvature in conjunction
with Left Gastroepiploic Artery
Blood supply
l Left gastric artery- br of coeliac trunk
l Right gastric artery- br of common
hepatic artery
l Right gastro epiploic artery- br of
gastrodoudinal artery
l Left gastro epiploic artery- br of
splenic artey
l 5-7 short gastric arteries -br of
splenic artery
Arterial Supply
Vasculature
Blood supply
lVeins
Portal vein
Superior mesenteric vein
Splenic vein
Venous drainage
? Right & left gastric veins -> hepatic
portal vein.
l Left gastroepiploic & short gastric
veins -> hepatic portal vein via the
splenic vein.
l Right gastroepiploic vein join superior
mesenteric vein.
Venous Drainage
Lymphatic drainage
l Area A pancreatosplenic
l Area B left gastric
l Area C right gastroepiploic sub pyloric
hepatic
l Area D diff directions into pyloric,
hepatic, left gastric
l Coeliac trunk cisterna chyli
Lymphatic Drainage
Anatomy
l Lymphatic drainage
l Lymph from the proximal portion of the
stomach drains along the lesser curvature first
drains into superior gastric lymph nodes
surrounding the Left Gastric Artery
l Distal portion of lesser curvature drains through
the suprapyloric nodes
l Proximal portion of the greater curvature is
supplied by the lymphatic vessels that traverse
the pancreaticosplenic nodes
l Antral portion of the greater curvature drains
into the subpyloric and omental nodal groups
Anatomy
l Nerve Supply
l Left and Right Vagus Nerves descend
parallel to the esophagus within the
thorax before forming a peri-esophageal
plexus between the tracheal bifurcation
and the diaphragm
l From this plexus, two vagal trunks
coalesce before passing through the
esophageal hiatus of the diaphragm
Anatomy
l Left (anterior)
l
Vagus Nerve
l Left of the
esophagus
l Branches
l Hepatic Branch
l Supplies liver
and Biliary
Tract
l Anterior gastric
or Ant. Nerve of
Latarget
Anatomy
l Right (posterior)
Vagus Nerve
l Right of the
esophagus
l Branches
l Celiac
l Posterior
Latarget
l Innervates
posterior
gastric wall
Anatomy
l Parasympathetic innervation of
Stomach- Vagus Nerve
l 90% of fiber in vagal trunk is afferent
(info transmitting from stomach to CNS)
l Sympathetic innervation of Stomach-
Splanchnic Nerve
l Derived from spinal segement T5-T10
Nerve supply
l Sympathetic T5 - T10
Via splanchenic nerves, coeliac and
hepatic pluxes
? Vasomotor
? Motor to pyloric shincter only
? Pain sensation from stomach
Nerve supply
l Parasympathetic
From vagi through oesophageal pluxes
and gastric nerves
? Motor and secretomotor
Innervation
functions
l Reservoir of food
l Peristaltic movements
l Gastric glands gastric juice, HCL
l Mucous
l absorption
Applied anatomy
l Displacement of stomach
l Hiatus hernia
l Congenital diaphramatic hernia
l Pyloro spasm
l Congenital hypertrophic pyloric stenosis
l Gastrectomy ? ca stomach
Applied anatomy
l Ulcers, helico bacter pylori and
vagotomy
l Gastric pain felt in epigastium
l Barium meal x ray, gastroscope
This post was last modified on 05 April 2022