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soma.md
Qui comprendiamo:
- SOMA: il soma
- VGSC-SOMA-H: Na ion channels. Open only when VDB high
- VGSC-SOMA-M: Na ion channels. Open only when VDB medium
- VGSC-SOMA-L: Na ion channels. Open only when VDB low
SOMA: container
Simplified verifiable behaviors:
— ms:
- Resting at -70 mV: Leak channels + pumps (keep at resting)
- VDB Depolarization : ~1-2 ms: Na⁺ enters (some VGSCs open)
- Opened VGSC and then remain closed for a refractory period
- Spike if depolarized above threshold: to -50 mV
- Ca2+ enter
- Repolarization to -70 mV: ~1-2 ms: K⁺ exits (VG K⁺ channels open) ← NOT pumps!
- After-hyperpolarization: ~5-20 ms: K⁺ channels still open
— secs:
- Return to exact -70 mV: ~100-1000 ms: Na⁺/K⁺ pumps restore gradients
- Ca2+ accumulation
— mins:
- VGSC modulation
G expression:
— ms:
-
based on VDB, VGSC open and let Na+ in. VGSG then go into refractory
-
if Na fullness then ApCtx. Here the threshold is based only on the integration of Na+
-
increase SpikeTrainTraces (fast at spike)
-
increase Ca2+ traces
-
decrease Na: fast pump which decreases Na+, we do not model K+ -- there is a tug of war between Na entering and exiting. Na can reach fullness only if VDB increases fast (derivative)
-
there are 2 context: ApCtx and RefractorySoma imlemented with timers and tunable
-
decrease SpikeTraintraces slow, only if away from spiketrain this is empty
-
Tune: -- The threshold is tuned during the spiketrain. Low threshold at rest, to increase sensitivity, threshold increase during spike to increase discrimination
— secs:
- SpikeTrainTraces
— mins:
- Tune: -- refractory lenght
Tubs:
-
VDB: dendrites deliver current
-
Na: are a proxy for the Coulombs of charge building up on the somatic membrane. They are used to check threshold, but also to mimic Na+ and K+ pumping
-
Ca2+: Medium term traces to guide tuning and Night development. It is a local trace, ATP is a global (Astrocyte)
-
SpikeTrainTraces: sono le tracce che consentono al neurone di far partire il Tuning neuronale, quando e' lontano da uno spike-train, ovvero e' in riposo.
-
RefractorySoma: tracce di refractory
container: SOMA
expansion:
- VGSC-SOMA-H ( full: 50x, active: 20x, empty: 10x )
# modulated_by: VGSC-SOMA-H-TUN # possible/actual
- VGSC-SOMA-M ( full: 50x, active: 20x, empty: 10x )
# modulated_by: VGSC-SOMA-M-TUN # possible/actual
- VGSC-SOMA-L ( full: 50x, active: 20x, empty: 10x )
# modulated_by: VGSC-SOMA-L-TUN # possible/actual
tub_local:
- VDB
- Na
- Ca2+
- RefractorySoma
tub_intricated:
- SpikeTrainTraces ( contained_in: DAY-N )
ms: SOMA
SOMA-Status: contextor
As dendrites deliver current (VDB), the soma acts like a capacitor. It "stores" this charge in the form of membrane potential. This contextualizes VGSC-SOMA to open ion channels that let Na+ ions in.
This only applies if not ApCtx, or in other words, SOMA is not in refractory period.
SOMA-Status: ( active: 60x )
type: contextor
contained_by: SOMA
in_context: any
condition: ( VDB fullness ) AND NOT AP_ctx
out_context: VDBMax_Ctx
condition: ( VDB mediumness ) AND NOT AP_ctx
out_context: VDBMedium_ctx
condition: ( VDB emptiness ) AND NOT Ap_ctx
out_context: VDBLow_ctx
condition: NOT ( Na empty )
out_context: NaSpill_ctx
condition: NOT ( RefractorySoma empty )
out_context: RefractorySoma_ctx
SomaSpike: contextor
Il fatto che mettiamo il check di AP separato dal check del Soma-Status, e' perche' vogliamo poter avere un RF specifico per AP, eventualmente tunabile.
Qui siamo nella fase effettiva di spike, non refractory che viene dopo. Fa da contesto di durata fra un RF ed un altro.
La fullness di Na rappresenta il threshold e puo' essere modificato. La fullness di RefractorySoma rappresenta la lunghezza del refractory.
SomaSpike: ( active: 30x )
type: contextor
contained_by: SOMA
in_context: any
condition: ( Na fullness ) AND ( RefractorySoma emptiness )
out_context: AP_ctx
out_context: bAp_ctx
ActiveAP: accumulator
Durante la fase effettiva di spike:
- eliminiamo Na accumulati. Qui ad un RF molto maggiore che con NaSpill. In teoria qui dovremmo eliminare tutti gli Na e NaSpill potrebbe non servire.
- riempiamo RefractorySoma per fase di refractory
- riempiamo Ca2+ per le tracce medio termine di potenziamento/depotenziamento.
ActiveAP: ( active: 8x )
type: accumulator
contained_by: SOMA
in_context: Ap_ctx
hypothesis: NOT Na empty
action: [ decrease Na ]
trace:
hypothesis: NOT RefractorySoma full
action: [ increase RefractorySoma ]
trace:
hypothesis: NOT Ca2+ full
action: [ increase Ca2+ ]
trace:
NaSpill: accumulator
Questo potrebbe non servire se eliminiamo tutti Na durante ActiveAP.
NaSpill: ( active: 8x )
type: accumulator
contained_by: SOMA
in_context: NaSpill_ctx
hypothesis: NOT ( Na emptiness )
action: [ decrease Na ]
trace:
RefractorySomaSpill: accumulator
Lo spill deve essere piu' lento dell'increase che avviene in ActiveAP
RefractorySomaSpill: ( active: 16x )
type: accumulator
contained_by: SOMA
in_context: RefractorySoma_ctx
hypothesis: NOT ( RefractorySoma empty )
action: [ decrease RefractorySoma ]
trace:
sec: SOMA
min: SOMA
VGSC-SOMA-H: container
Voltage Gated Sodium Channel: difficult to open (High)
container: VGSC-SOMA-H
tub_local:
RefractoryH ( full: 60x, active: 30x, empty: 0x )
tub_intricated:
Na ( contained_in: SOMA)
context_intricated:
VDBMaxCtx ( contained_by: SOMA )
sec: VGSC-SOMA-H
VGSC-H_Status: contextor
Il check su refractory deve essere fatto ad un RF maggiore della eliminazione di Refractory. Questo perche' e' un era nella quale avviene l'episodio.
VGSC-H_Status: ( active: 60x )
type: contextor
contained_by: VGSC-SOMA-H
in_context: any
condition: VDBMaxCtx AND ( RefractoryH emptiness )
out_context: NaEnterH_Ctx
condition: ( RefractoryH mediumness ) OR ( RefractoryH fullness )
out_context: RefractoryHSpill_ctx
NaEnterH: accumulator
Se metto il controllo sulla (NOT Ready fullness) il VGSC puo' far entrare un numero di Na non superiore ad un massimo. Questo sopra è il commmento della versione precedente, ora la quantità di NA increase dipende dal rf di VGSC-H_TPC dato che li c'è la condition sulla presenza delle traccie di refractory
NaEnterH: ( active: 1x )
type: accumulator
contained_by: VGSC-SOMA-H
in_context: NaEnterH_ctx
hypothesis: ( NOT Na full )
action: [ Na increase]
trace: None
hypothesis: ( NOT RefractoryH full )
action: [ RefractoryH increase ]
trace: None
RefractoryHSpill: accumulator
Lo Spill deve avere un rf maggiore dell'interacting che incrementa RefractoryH (interactor precedente)
RefractoryHSpill: ( active: 1x )
type: accumulator
contained_by: VGSC-SOMA-H
in_context: RefractoryHSpill_ctx
hypothesis: NOT ( RefractoryH empty )
action: [ RefractoryH decrease ]
trace: None
VGSC-SOMA-M: container
Voltage Gated Sodium Channel: less difficult to open (Medium)
container: VGSC-SOMA-M
tub_local:
RefractoryM ( full: 60x, active: 30x, empty: 0x )
tub_intricated:
Na ( contained_in: SOMA)
context_intricated:
VDBMedCtx ( contained_by: SOMA )
sec: VGSC-SOMA-M
VGSC-M_TPC: contextor
Il check su refractory deve essere fatto ad un RF maggiore della eliminazione di Refractory. Questo perche' e' un era nella quale avviene l'episodio.
VGSC-M_Status: ( active: 60x )
type: contextor
contained_by: VGSC-SOMA-M
in_context: VDBMediumCtx OR VDBMaxCtx
condition: ( RefractoryH emptiness )
out_context: NaEnterM_Ctx
NaEnterM: accumulator
Se metto il controllo sulla (NOT Ready fullness) il VGSC puo' far entrare un numero di Na non superiore ad un massimo. Questo sopra è il commmento della versione precedente, ora la quantità di NA increase dipende dal rf di VGSC-H_TPC dato che li c'è la condition sulla presenza delle traccie di refractory
NaEnterM: ( active: 1x )
type: accumulator
contained_by: VGSC-SOMA-M
in_context: NaEnterM_ctx
hypothesis: ( NOT Na full )
action: [ Na increase]
trace: None
hypothesis: ( NOT RefractoryM full )
action: [ RefractoryH increase ]
trace: None
RefractoryMSpill: accumulator
Lo Spill deve avere un rf maggiore dell'interacting che incrementa RefractoryH (interactor precedente)
RefractoryMSpill: ( active: 1x )
type: accumulator
contained_by: VGSC-SOMA-M
in_context: any
hypothesis: NOT ( RefractoryM empty )
action: [ RefractoryM decrease ]
trace: None
VGSC-SOMA-L: container
Voltage Gated Sodium Channel: easy to open (Low)
container: VGSC-SOMA-L
tub_local:
RefractoryL ( full: 60x, active: 30x, empty: 0x )
tub_intricated:
Na ( contained_in: SOMA)
context_intricated:
VDBLowCtx ( contained_by: SOMA )
sec: VGSC-SOMA-L
VGSC-L_TPC: contextor
Il check su refractory deve essere fatto ad un RF maggiore della eliminazione di Refractory. Questo perche' e' un era nella qualle avviene l'episodio.
VGSC-L_Status: ( active: 60x )
type: contextor
contained_by: VGSC-SOMA-L
in_context: VDBLowCtx OR VDBMediumCtx OR VDBMaxCtx
condition: ( RefractoryH emptiness )
out_context: NaEnterL_ctx
NaEnterL: accumulator
Se metto il controllo sulla (NOT Ready fullness) il VGSC puo' far entrare un numero di Na non superiore ad un massimo. Questo sopra è il commmento della versione precedente, ora la quantità di NA increase dipende dal rf di VGSC-H_TPC dato che li c'è la condition sulla presenza delle traccie di refractory
NaEnterL: ( active: 1x )
type: accumulator
contained_by: VGSC-SOMA-L
in_context: NaEnterL_ctx
hypothesis: ( NOT Na full )
action: [ Na increase]
trace: None
hypothesis: ( NOT RefractoryL full )
action: [ RefractoryL increase ]
trace: None
RefractoryLSpill: accumulator
Lo Spill deve avere un rf maggiore dell'interacting che incrementa RefractoryH (interactor precedente)
RefractoryLSpill: ( active: 1x )
type: accumulator
contained_by: VGSC-L-SOMA
in_context: any
hypothesis: NOT ( RefractoryL empty )
action: [ RefractoryL decrease ]
trace: None
VGSC-SOMA-TUN: Tuner
tuner: VGSC-SOMA-TUN
contained_by: SOMA
tunes: SOMA/expansion/VGSC-SOMA
context_intricated:
- TunPossible ( contained_by: DAY-N )
tub_local:
tub_intricated:
Check: check_tpc
context: check_tpc
contained_by: VGSC-SOMA-TUN
rf: ( active: 60x )
in_context: TunPossible
condition:
out_context: TunSomaVcgg
?: interacting
interacting: ?
contained_by: TUN-PRE-VGCC
rf: ( active: x )
context: TunSomaVcgg
hypothesis:
action:
trace: