Action Potential
Hodgkin-Huxley dynamics of a single neuron. Na+ and K+ channels produce an all-or-nothing spike.
NEWNeuroscience simulator · iOS & Android
脳楽
NOURAKU
See the brain compute
NOURAKU is an educational app for neuroscience and neural computation. Move the sliders and watch neurons fire, circuits synchronize and networks learn.
Free · One banner ad on the home screen only · No in-app purchases
14 interactive simulations
Every screen comes with an explanation and the formulas behind it.
Neural basics
Firing Patterns
The Izhikevich model: regular spiking, bursting, chattering, fast spiking and low-threshold neurons.
Axonal Conduction
A spike travels down the axon. Myelination produces saltatory conduction.
Synapse
Excitatory and inhibitory transmission, and how EPSPs and IPSPs add up.
Neural Circuit
100 integrate-and-fire neurons. The excitation/inhibition balance decides between calm and chaos.
Brain Waves
Delta to gamma rhythms. Change arousal and the dominant rhythm shifts.
Neural Synchrony
Kuramoto phase oscillators lock into a shared rhythm above a critical coupling.
Learning and memory
Hebbian Learning
The STDP curve: spike order decides whether a synapse strengthens or weakens.
Perceptron
A linear classifier learns to separate two clusters, step by step.
Reinforcement Learning
A Q-learning agent solves a maze, with the reward prediction error shown live.
Memory
A Hopfield network recalls a stored pattern from a noisy input.
Perception and cognition
Receptive Field
Gabor filters detect edges and orientations like simple cells in V1.
Lateral Inhibition
How the retina sharpens edges, and why Mach bands appear on a grey staircase.
Cognitive Illusions
Muller-Lyer arrows, the Stroop task with reaction time, and the motion aftereffect.
A closer look
A clean design with dark and light themes.
Features
Explanations and formulas on every screen
Textbook models such as Hodgkin-Huxley, STDP and Hopfield
Dark and light themes
Available in more than 70 languages
Works offline (except ads)
iPhone, iPad and Android
Start exploring the brain today
Free to download. No sign-up and no in-app purchases.