[Verse 1] Frontal horn to atrium, the lateral chambers sprawl Caudate rides the curvature, thalamus lines the hall Choroid plexus dangles where the choroidal fissure bends Taenia marks the boundary where the ependyma ends Stria terminalis tracing where the thalamostriate flows Septal veins converging at the foramen — there it goes Monro's the narrow gateway, two rivers meet as one Lateral into third, the CSF begun [Chorus] El fluido que circula, que corre y que sostiene Trescientos cincuenta microlitros por minuto — mantiene The choroid plexus brews it, the granulations drink Arachnoid absorption at the venous sinus brink O sistema glinfático lava enquanto a noite vem Glymphatic channels flushing while the waking world suspends Monro–Kellie holds the volume, skull is fixed and sealed Pressure climbs when something swells — compliance is revealed [Verse 2] Third ventricle — a narrow slit suspended in the deep The velum interpositum holds the ICVs in sleep Roof to floor: tuber cinereum, the mammillary pair Posterior perforated substance, basilar lying bare Anterior wall is lamina terminalis, commissure at its crown Posterior: pineal recess, habenular handed down Massa intermedia bridges wall to wall, a grey reunion Aqueduct of Sylvius — singular communion [Chorus] El fluido que circula, que corre y que sostiene Trescientos cincuenta microlitros por minuto — mantiene The choroid plexus brews it, the granulations drink Arachnoid absorption at the venous sinus brink O sistema glinfático lava enquanto a noite vem Glymphatic channels flushing while the waking world suspends Monro–Kellie holds the volume, skull is fixed and sealed Pressure climbs when something swells — compliance is revealed [Verse 3] Fourth ventricle, a diamond tent with Magendie below Luschka opens laterally — three exits for the flow Five hundred mils produced each day, a relentless quiet tide Normal pressure ten to fifteen, composition clarified Infection clouds the protein, drops the glucose in the well Xanthochromia in hemorrhage — bilirubin tells the tale Malignancy sends cytology, aberrant cells adrift The lumbar puncture reads the room, each molecule a gift [Bridge] Now the pressure–volume curve grows steep when compliance thins B-waves flicker restlessly where instability begins Plateau waves — Lundberg A — mean perfusion starts to fail Ten to twenty minutes, sixty millimetres on the scale The word for this capacitance to absorb a sudden swell Is *capacitance* — no, rarer still — vitiation of the spell *Effluvium* — the overflow, the seeping past the brink Glymphatic and meningeal lymph — more pathways than we think
← Module 5 — Brainstem, Cranial Nerves, and Cerebellum | Module 7 — Neurovascular Anatomy →