[Verse 1] Rostral corner, lateral edge, hugging perirhinal skin, Layer two ain't stellate soldiers, it's fan cells packed within, Clustered clumps instead of grids, reelin marks the frame, Theta rhythm running weaker — different clock, different game. [Chorus] Lateral E-C, what and when, never where, Object, trace, and drifting time, fan cells everywhere, Perirhinal whisper, piriform scent in the air, LEC writes the story, MEC draws the square. [Verse 2] Perirhinal cortex hands it objects, textures, shapes you touched, Piriform bulb breathes in memory, olfactory hush, Amygdala tosses feeling, insula stirs the taste, Prefrontal drops the context, nothing here misplaced. Then CA1 and subiculum send an echo back again, Distal CA1, proximal sub — the loop that never ends. [Chorus] Lateral E-C, what and when, never where, Object, trace, and drifting time, fan cells everywhere, Perirhinal whisper, piriform scent in the air, LEC writes the story, MEC draws the square. [Verse 3] Perforant path forks in two, LEC won't share MEC's lane, Outer third of dentate gyrus — that's the lateral domain, Middle third's for grid cell cousins, mapping longitude and lat, LEC's aiming distal CA1, and that's just fact. No coordinates, no compass, just the fingerprint of things, Item code embedded deep in what the outer synapse brings. [Verse 4] Object cells fire when the thing appears inside the room, Object-trace cells keep on humming after it leaves, like perfume, Egocentric bearing cells whisper, "it's to my right," Temporal context drifting slow, like dye dissolved in light. Allocentric tuning? Weak — don't ask it where's the door, LEC's no cartographer, it's librarian keeping score. [Verse 5] First to fall in Alzheimer's shadow, tau creeps in layer two, Fan cells wither one by one before the grid cells ever knew, That's why the past dissolves before the way back home does too, Losing what before you're losing where — the science rings out true. Tangles start where item memory lives, deep in that entorhinal seam, Losing the "what" unravels first, long before you lose the scheme. [Bridge] Feed it smell and feed it face, feed it feeling, feed it word, No grid, no border, no place-cell chorus to be heard, That's why LEC answers "what and when," never "where," Perirhinal plus amygdala build memory, not a map to share. Trace the loop from cortex deep to hippocampus and right back, Context drifts, the object stays — that's the lateral track. [Chorus] Lateral E-C, what and when, never where, Object, trace, and drifting time, fan cells everywhere, Perirhinal whisper, piriform scent in the air, LEC writes the story, MEC draws the square. [Outro] Fan cells spread like open hands, catching what just passed you by, Lateral entorhinal cortex — the when, the what, the why.
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