[Verse 1]
Deep in cortex where the pyramids rise tall
Layer five neurons standing like cathedral walls
Two zones separated by the apical trunk
Basal down below where the bottom-up funk
Perisomatic catching sensory streams
Strong feedforward signals fulfilling dreams
Sodium spikes igniting at the soma core
While apical tuft waits for something more
[Chorus]
BAC firing when the signals align
Backpropagation meets calcium shine
Bottom-up data and top-down context
Coincidence detector running complex
Single spike alone or burst when they meet
Temporal precision makes the circuit complete
Two integration zones in dendritic dance
Larkum's rule governs the neural romance
[Verse 2]
Apical tuft reaching toward the crown
Feedback from higher areas floating down
Attention and expectation painting scenes
Distal inputs living in between
Passively weak at the somatic site
But calcium spikes can ignite the night
At the nexus where the pathways cross
Gain without the temporal loss
[Chorus]
BAC firing when the signals align
Backpropagation meets calcium shine
Bottom-up data and top-down context
Coincidence detector running complex
Single spike alone or burst when they meet
Temporal precision makes the circuit complete
Two integration zones in dendritic dance
Larkum's rule governs the neural romance
[Bridge]
Millisecond windows where magic unfolds
Somatic action potential upward rolls
Meets apical depolarization there
Calcium channels opening with flair
Emphatic burst signals downstream flow
Plasticity triggers start to grow
Neuron shouts when input matches prediction
Associative learning through coincidence friction
[Verse 3]
Reading the stack from dendrite to spine
Synapses landing in zones by design
NMDA spikes clustering in branches thin
Two-layer networks processing within
Order and timing weight every connection
Inhibition gates provide protection
Disinhibition opens apical gates
While BAC firing orchestrates neural fates
[Verse 4]
Compartmental models trace the flow
From dendritic tips to cell body below
Voltage gradients climb the neural tree
While synaptic integration runs free
Predictive coding needs this dual design
Error signals travel up the line
When reality meets expectation's call
BAC bursts announce it to them all
[Final Chorus]
BAC firing when the signals align
Backpropagation meets calcium shine
Bottom-up sensing with top-down belief
Pyramidal neurons bring cortical relief
Burst or single spike tells the tale
Of feedforward feedback without fail
L5 integration across every layer
Dendritic computation neural prayer