[Verse 1]
In the fourth week, a tube begins to form
Foregut suspended, dorsal and ventral, caught between two storms
The mesogastrium stretches like a veil
Dorsal drapes toward the spleen, ventral toward the liver trail
The stomach is a compass, hasn't found its north
Until rotation grabs it, pulls the greater curvature forth
Ninety degrees clockwise, longitudinal the axis spins
The greater curvature drifts left, and that is where the mystery begins
The left vagus nerve — it rode the anterior wall
So when the stomach twisted, left fibers took that hall
Now the anterior vagal trunk carries left-sided grace
With hepatic branches reaching up into their proper place
[Chorus]
Left becomes anterior, right fades to the back
Clockwise on the longitude, the pylorus swings and tracks
Greater omentum billowing, the lesser sac sealed in
Dorsal mesogastrium — where the spleen was born within
Left vagus, hepatic branches, anterior wall
Rotate the sequence, draw it out, you'll remember all
[Verse 2]
Then the anteroposterior axis takes its turn
The pylorus swings rightward and cephalad — a crucial burn
The cardia drifts left and caudal, settling into place
The duodenum traces out its C-loop, carved in space
That C-loop presses retroperitoneal, fixed against the wall
The ligament of Treitz suspends the junction standing tall — no, anchors it in place where surgeons make their call
[Chorus]
Left becomes anterior, right fades to the back
Clockwise on the longitude, the pylorus swings and tracks
Greater omentum billowing, the lesser sac sealed in
Dorsal mesogastrium — where the spleen was born within
Left vagus, hepatic branches, anterior wall
Rotate the sequence, draw it out, you'll remember all
[Bridge]
Omental bursa hidden like a whispered fold
The gastrosplenic ligament keeps its secrets cold
Gastrophrenic tethers cardia up above
The greater omentum drapes like something left unloved
And in the dorsal mesogastrium, quiet, dense, and dark
The splenic anlage condenses — budding from that arc
[Verse 3]
When rotation stalls or fixation fails to hold
The anatomy rewrites itself in consequences bold
Situs inversus flips the mirror, stomach swings to right
The surgeon at the table recalibrates the site
Gastric duplication cysts — posterior fundus, near the GE zone
Microgastria leaves a tube too narrow, standing alone
Antral webs obstruct the exit, atresia seals it through
Diverticula pocket at the fundus, posterior in view
[Chorus]
Left becomes anterior, right fades to the back
Clockwise on the longitude, the pylorus swings and tracks
Greater omentum billowing, the lesser sac sealed in
Dorsal mesogastrium — where the spleen was born within
Left vagus, hepatic branches, anterior wall
Rotate the sequence, draw it out, you'll remember all
[Outro]
Draw the axis, mark the degrees, trace the vagal thread
The anterior trunk is left-born — carry that instead
Foregut gives the stomach, mesogastrium gives the sac
Rotation wrote the anatomy — now trace your way back