K_Leak

class braincell.channel.K_Leak(size, g_max=Quantity(0.005, 'mS / cm^2'), name=None)

Potassium leak current.

A voltage-independent, always-open potassium conductance:

\[I = g_{max} \, (E_K - V)\]

Unlike IL, the reversal potential is not a parameter of this class – it is taken from the potassium ion object this channel is attached to, so E_K follows whatever the ion computes (fixed, Nernst, or concentration-driven). There are no gating variables and no state to integrate: init_state(), reset_state() and compute_derivative() are all no-ops.

Parameters:

• size (int | Sequence[int] | integer | Sequence[integer]) – Channel state shape.

• g_max (Array | ndarray | bool | number | bool | int | float | complex | Quantity | Callable) – Leak conductance density. Defaults to 0.005 mS/cm2.

• name (str | None) – Optional channel name.

See also

braincell.channel.IL

Ion-independent leak with its own fixed reversal potential parameter.

braincell.ion.Potassium

Ion object supplying E_K.

Notes

This class has no primary literature source, and that is a determination rather than an omission: the current law is textbook Ohm’s law and the 0.005 mS/cm2 default is a conventional placeholder that any caller overrides. No source model was identified for it, so the class deliberately ships without a References section.

root_type is Potassium, so the channel must be attached to a potassium ion; the ion, not the channel, owns the driving force.

compute_derivative(V, K)

Compute the derivative of the channel’s state variables.

This method should be implemented by subclasses to calculate how the channel’s state changes over time.

Parameters:

• *args – Variable length argument list.

• **kwargs – Arbitrary keyword arguments.

Raises:

NotImplementedError – This method must be implemented by subclasses.

current(V, K)

Calculate the current for this ion channel.

This method should be implemented by subclasses to compute the current based on the channel’s specific properties and state.

Parameters:

• *args – Variable length argument list.

• **kwargs – Arbitrary keyword arguments.

Raises:

NotImplementedError – This method must be implemented by subclasses.

init_state(V, K, batch_size=None)

Initialize the state of the ion channel.

This method should set up the initial state of all variables for the channel.

Parameters:

• *args – Variable length argument list.

• **kwargs – Arbitrary keyword arguments.

reset_state(V, K, batch_size=None)

Reset the state of the ion channel.

This method should reset all state variables of the channel to their initial values.

Parameters:

• *args – Variable length argument list.

• **kwargs – Arbitrary keyword arguments.

root_type

alias of Potassium