From 5ef5ce5a8d0ffc60ff0c7da8ecca13f27310dccd Mon Sep 17 00:00:00 2001 From: ocrampal Date: Tue, 14 Apr 2026 10:43:01 +0200 Subject: [PATCH] varie --- neuron/README.md | 56 ++++++++++++++++++++---------------------------- 1 file changed, 23 insertions(+), 33 deletions(-) diff --git a/neuron/README.md b/neuron/README.md index 6563a0a..9bc5d59 100644 --- a/neuron/README.md +++ b/neuron/README.md @@ -9,14 +9,11 @@ This framework describes a system that is not a static processor, but a living e ### Pillar 1: The Electrical Pillar (The Integration Layer) - Function & Reason: Pattern Extraction. The neuron acts as a spatiotemporal filter. It integrates thousands of tiny inputs across its dendritic tree (space) and within narrow windows of time. Its "output" is a declaration that a specific relevant pattern has been recognized. - - Timescale: Milliseconds (ms). - - Behaviors: Summation of Excitatory/Inhibitory Post-Synaptic Potentials (EPSPs/IPSPs), the "Tug-of-War" at the soma, and the propagation of the "Success" signal (the Spike). - - Elements Involved: --- Ions: Na+ (The "Yes" current), K+ (The "No/Reset" current). --- Hardware: Dendritic tree (The Space), VGSC/VGKC (The Timers). + \-- Ions: Na+ (The "Yes" current), K+ (The "No/Reset" current). + \-- Hardware: Dendritic tree (The Space), VGSC/VGKC (The Timers). ### Pillar 2: The Metabolic Pillar (The Constraint Layer) @@ -24,9 +21,9 @@ This framework describes a system that is not a static processor, but a living e * **Timescale:** **Seconds to Minutes.** * **Behaviors:** Active transport of ions, ATP production, and "Metabolic Silencing" (shutting down to prevent death when energy is low). * **Elements Involved:** - * **Molecules:** ATP, Glucose, Oxygen. - * **Hardware:** Na/K-ATPase Pump (the "Battery Recharger"), Mitochondria. - * **Constraint:** The $Na^+/K^+$ ratio. + * **Molecules:** ATP, Glucose, Oxygen. + * **Hardware:** Na/K-ATPase Pump (the "Battery Recharger"), Mitochondria. + * **Constraint:** The $Na^+/K^+$ ratio. ### Pillar 3: The Calcium Pillar (The Logic / Information Keeper) @@ -34,9 +31,9 @@ This framework describes a system that is not a static processor, but a living e * **Timescale:** **Minutes to Hours.** * **Behaviors:** **Homeostatic Scaling** (tuning the master volume), Synaptic Plasticity (LTP/LTD), and Gain Control. * **Elements Involved:** - * **Ions:** Calcium ($Ca^{2+}$). - * **Hardware:** Somatic VGCCs (L-type), NMDA receptors. - * **Software:** Calmodulin, CaMKIV (signaling proteins that "count" the calcium). + * **Ions:** Calcium ($Ca^{2+}$). + * **Hardware:** Somatic VGCCs (L-type), NMDA receptors. + * **Software:** Calmodulin, CaMKIV (signaling proteins that "count" the calcium). ### Pillar 4: The Structural Pillar (The Renovation Layer) @@ -44,24 +41,22 @@ This framework describes a system that is not a static processor, but a living e * **Timescale:** **Days to Weeks.** * **Behaviors:** **Axon Initial Segment (AIS) translocation** (moving the trigger zone), dendritic branch growth/pruning, and changes in total channel/receptor count via gene expression. * **Elements Involved:** - * **Structural Proteins:** Actin, Microtubules, Ankyrin-G (the "anchor"). - * **Genetics:** mRNA, Ribosomes, Transcription Factors (e.g., CREB). + * **Structural Proteins:** Actin, Microtubules, Ankyrin-G (the "anchor"). + * **Genetics:** mRNA, Ribosomes, Transcription Factors (e.g., CREB). ### What is Achieved by This Entity? By combining these four pillars, the neuron becomes a Non-Static Adaptive Engine: - Selective Attention: It doesn't just pass signals; it ignores noise and only "speaks" when its specific spatial and temporal requirements are met. - - Self-Regulating Sensitivity: If the patterns it is expecting become too frequent or too rare, the Calcium and Structural pillars adjust the Electrical hardware to find a new "sweet spot." - - Metabolic Wisdom: It balances the "desire" to extract patterns against the "cost" of ATP. It is an engine that tunes itself to be as efficient as possible. - - Hardware-Software Unity: Unlike a computer, where the software cannot change the CPU, the neuron's "software" (the activity patterns) physically rewrites its "hardware" (the pillars) every single day. This is the portrait of a system that isn't just "running a program"—it is a biological machine constantly sculpting itself to become a better filter for the world it perceives. --- + --- ## Flussi e chiusure @@ -69,15 +64,10 @@ This is the portrait of a system that isn't just "running a program"—it is a b ### Flusso da POST a SOMA - Gli NT che arrivano a BEH-POST-AMPA aprono i AMPA che fa entrare Na che vengono integrati nella POST - - Gli Na nella POST aprono NDMA che fanno entrare Ca2+ - - Ca2+ genera VPost nel DB - - L'integrazione di VPost nel DB genera VDB nel SOMA - - L'integrazione di VDB nel SOMA determina AP - - Si aprono i Canali ionici del SOMA, si genera VSOMA e refractory period (emergente) ### Flusso da SOMA a POST @@ -94,8 +84,8 @@ Based on the computational model provided, here is the complete breakdown of all ### 1. Presynaptic Behaviors -* **Action Potential Arrival (`V_pre`):** When a spike occurs, the membrane potential (`V_pre_state`) jumps to a peak and decays based on `tau_V_pre`. This profile determines the duration of ion channel opening. -* **Calcium Influx (`VGCC`):** Voltage-Gated Calcium Channels open based on `V_pre_state`. The flow is regulated by three "brakes": **eCB** (retrograde), **CDI** (inactivation), and **mGluR** (autoreceptor). +* **Action Potential Arrival (**`V_pre`**):** When a spike occurs, the membrane potential (`V_pre_state`) jumps to a peak and decays based on `tau_V_pre`. This profile determines the duration of ion channel opening. +* **Calcium Influx (**`VGCC`**):** Voltage-Gated Calcium Channels open based on `V_pre_state`. The flow is regulated by three "brakes": **eCB** (retrograde), **CDI** (inactivation), and **mGluR** (autoreceptor). * **Intracellular Buffering:** Free calcium (`Ca_micro`) is immediately captured by buffers (`B_free`). As activity increases and buffers saturate, the effective calcium concentration rises faster (**Metabolic Cascade 4**). * **Vesicle Release (NT):** Neurotransmitter release is **deterministic** and follows a Hill equation (simulating Synaptotagmin-1 cooperativity). It is limited by the number of vesicles in the Prontly Releasable Pool (`N_RRP`) and suppressed by high existing levels of NT in the cleft. * **Vesicle Recycling:** Vesicles move from the Reserve Pool (`N_RP`) to the `N_RRP` at a rate determined by the calcium trace (`Tr_Ca`). Fast recruitment occurs during high activity; slow recruitment occurs at rest. @@ -118,9 +108,9 @@ Based on the computational model provided, here is the complete breakdown of all * **Leaky Integration:** The soma integrates the signal from the dendrite (`V_dend`) scaled by `soma_weight`. It acts as a leaky integrator with a time constant of `tau_soma`. * **Action Potential (AP) Generation:** If `V_soma` crosses the threshold, a multi-phase AP is triggered: - 1. **Rising Phase:** Simulated Na+ channel opening (reaches `V_AP_peak`). - 2. **Falling Phase:** Simulated K+ channel opening (drops to `V_AHP`). - 3. **AHP Phase:** Recovery from hyperpolarization back to rest. + 1. **Rising Phase:** Simulated Na+ channel opening (reaches `V_AP_peak`). + 2. **Falling Phase:** Simulated K+ channel opening (drops to `V_AHP`). + 3. **AHP Phase:** Recovery from hyperpolarization back to rest. * **Refractory Periods:** After firing, the soma enters an **Absolute Refractory Period** (cannot fire) followed by a **Relative Refractory Period** (threshold is temporarily much higher). ### 5. Astrocytic Behaviors @@ -140,10 +130,10 @@ Based on the computational model provided, here is the complete breakdown of all ### Logic Summary Table -| Input | Process | Output | -| :--- | :--- | :--- | -| **NT in Cleft** | AMPA / NMDA Opening | **V_post** (Postsynaptic Potential) | -| **V_post** | Dendritic Summation | **V_dend** (Dendritic Potential) | -| **V_dend** | Somatic Integration | **V_soma** (Somatic Potential) | -| **V_soma > Threshold** | Spike Kinetics | **Forward AP** & **Retrograde bAP** | -| **Low ATP** | Pump Failure | **Synaptic Silencing** (Protection) | +| Input | Process | Output | +|------------------------|---------------------|-------------------------------------| +| **NT in Cleft** | AMPA / NMDA Opening | **V_post** (Postsynaptic Potential) | +| **V_post** | Dendritic Summation | **V_dend** (Dendritic Potential) | +| **V_dend** | Somatic Integration | **V_soma** (Somatic Potential) | +| **V_soma > Threshold** | Spike Kinetics | **Forward AP** & **Retrograde bAP** | +| **Low ATP** | Pump Failure | **Synaptic Silencing** (Protection) |