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MotorUnit

sc_neurocore_engine::neurons::motor

Struct MotorUnit 

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pub struct MotorUnit {
Show 14 fields
    pub v: f64,
    pub v_rest: f64,
    pub v_reset: f64,
    pub v_threshold: f64,
    pub tau_m: f64,
    pub adapt: f64,
    pub tau_adapt: f64,
    pub a_adapt: f64,
    pub gain: f64,
    pub force: f64,
    pub twitch_amp: f64,
    pub tau_twitch: f64,
    pub force_decay: f64,
    pub dt: f64,

}
Expand description

Motor unit — functional unit of motor control: alpha motor neuron + muscle fibre.

Each spike from the embedded LIF motor neuron triggers a muscle twitch. Force output is the summation of overlapping twitches (rate coding). Higher firing rates → more twitch overlap → higher force (tetanus).

Muscle twitch modelled as a critically-damped second-order system: f(t) = A * (t/τ) * exp(1 - t/τ), giving a smooth rise-then-decay.

Fuglevand et al., J. Neurophysiol. 70(6), 1993. Heckman & Enoka, Compr. Physiol. 2(4), 2012.

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§v: f64§v_rest: f64§v_reset: f64§v_threshold: f64§tau_m: f64§adapt: f64§tau_adapt: f64§a_adapt: f64§gain: f64§force: f64§twitch_amp: f64§tau_twitch: f64§force_decay: f64§dt: f64

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impl MotorUnit

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pub fn new() -> Self

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pub fn slow() -> Self

Slow motor unit (type S): small, fatigue-resistant, low force.

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pub fn fast() -> Self

Fast motor unit (type FF): large, fatigable, high force.

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fn voltage_valid(value: f64) -> bool

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fn force_valid(value: f64) -> bool

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fn exact_relax(previous: f64, steady: f64, tau: f64, dt: f64) -> Option<f64>

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fn valid_state(&self) -> bool

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pub fn step(&mut self, drive: f64) -> i32

Step with descending drive (≥ 0). Returns spike (1/0). Force accessible via .force.

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pub fn reset(&mut self)

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impl Clone for MotorUnit

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fn clone(&self) -> MotorUnit

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for MotorUnit

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for MotorUnit

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fn default() -> Self

Returns the “default value” for a type. Read more

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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