neurovascular supply Flashcards
what are the 3 paired abdominal arteries?
suprarenal, renal and gonadal arteries
what are the 3 unpaired abdominal arteries?
celiac trunk, superior mesenteric artery and inferior mesenteric artery
at what level do the celiac trunk, SMA and IMA come off the abdominal aorta?
celiac trunk-T12
SMA-L1
IMA-L3
what are the 3 main branches of the celiac trunk?
what are the 5 main branches of the SMA?
what are the 3 main branches of the IMA?
celiac trunk: common hepatic artery, left gastric artery and splenic artery
SMA: middle colic, right colic, ileocolic, intestinal and ant&post inf pancreaticoduodenal arteries
IMA: left colic, sigmoid and superior rectal arteries
what 4 nerves supply muscle and skin of the abdomen?
- thoracoabdominal nerves T7-T11
- subcostal nerves T12
- iliohypogastric nerves L1
- ilioinguinal nerves L1
what are the 2 main sympathetic nerve groups supplying the abdominal viscera?
what is the difference between the neurons in these groups?
- cardiopulmonary splanchnic nerves-heart, lungs and oesophagus
- abdominopelvic splanchnic nerves-abdominopelvic viscera
Neurons:
1-post synaptic neurons - pre synaptic neurons
what are the 2 main parasympathetic nerve groups supplying abdominal viscera?
- CNX Vagus nerve-cardiothoracic viscera & abdominopelvic viscera until left colic flexure
- pelvic splanchnic nerves (S2-S4)
The Superior Mesenteric Artery supplies structures derived from the …
Midgut
e.g. small intestine, pancreas, ascending and transverse colon
The Inferior Mesenteric Artery supplies structures derived from the …
Hindgut
e.g. descending colon, sigmoid colon and proximal rectum
The Celiac trunk supplies structures derived from the …
Foregut
e.g. liver, spleen, stomach, pancreas, Duodenum and gall bladder
what regions of the body does the IVC drain?
lower limbs, most of the posterior abdominal wall and abdominopelvic viscera
how does the IVC return to the thoracic cavity. what structure does it communicate with in the mediastinum?
it leaves the abdomen through the caval foramen in the diaphragm and enters the thorax.
blood from the abdominal viscera passes through the portal venous system and the liver before entering the IVC via the Hepatic veins
list the nerves that make up the abdominopelvic splanchnic nerves
greater splanchnic nerves
lesser splanchnic nerves
least splanchnic nerves
lumbar splanchnic nerves
what information do visceral afferent nerves carry?
what stimuli can evoke visceral ‘pain’?
visceral afferents detect a range of mechanical and chemical stimuli.
pain my be elicited by sudden distention, spasms, strong contractions, chemical irritants and ischaemia
identify one artery supplying the oesophagus.
what is interesting about the nerve supply to the oesophagus?
oesophageal artery/ left gastric artery
the upper 1/2 is somatic, and is supplied by the recurrent laryngeal artery (branch of CNX)
the lower 1/2 receives PNS, SNS and visceral afferent supply.
PNS=CNX
SNS= cardiopulmonary splanchnic nerves, and abdominopelvic splanchnic nerves
