Neuron
A neuron, neurone, or nerve cell, is a cell that is excitable, firing electric signals called action potentials.
At a glance
Key signals
17% cross fields · reaches 11 more
- Biology
- Neuroscience
- Explanation
- Examples
- Misconception
- Sourced relations 3
- Attribution
Dependencies
What this concept builds on and what it makes possible — derived from the atlas’s dependency, causal and structural relations, not from every related edge.
Enables · leads to
Neural oscillationemerges fromNeuronEstablished
Brain rhythms.
Mechanism: Populations of neurons firing in sync produce the brain's measurable rhythms.
NeuroncausesNeural signalEstablished
neuron causes Neural signal.
Mechanism: A neuron fires an electrical impulse — the neural signal — along its axon to the next cell.
- Biology 2e (OpenStax) (2018) verified
Working memorydepends onNeuronEstablished
Memory rests on neurons.
Mechanism: Working memory is held in the sustained, patterned firing of networks of neurons in the prefrontal cortex.
System context
Neuronis part ofNervous systemEstablished
neuron is part of nervous system.
Mechanism: A neuron is the signalling unit of the nervous system: it carries electrical impulses and passes them to the next cell at a synapse.
- Wikidata verifiedmoderate evidence
Action potentialis part ofNeuronEstablished
The neuron's signal.
Mechanism: An action potential is the electrical spike a neuron sends along its axon.
Nucleusis part ofNeuronEstablished
nucleus is part of neuron.
Mechanism: The nucleus sits in the neuron's cell body, holding the DNA that directs the cell and keeps its machinery running.
- Wikidata verifiedmoderate evidence
Synapseis part ofNeuronEstablished
Where neurons meet.
Mechanism: A synapse is the junction where one neuron hands a signal to the next.
Structural role & consequence
Interpreted from the current atlas graph — what the connections mean, not just how many there are.
Removing this node lengthens the structural route between Neurodegeneration and Working memory from 2 to 7 steps (they stay connected — alternative routes exist).
structural · Structural removal simulation — not a historical or causal counterfactual.
17% of its relationships cross field boundaries, reaching 11 other disciplines — unusual in a discipline where most concepts stay within their field.
structural · Structural graph analysis — not a claim of importance, causation or history.
Directly enables 1 concept; following enables/causes relations, 1 concept is downstream across 3 disciplines.
structural · Follows only enables/causes dependency edges — not general relatedness.
Currently dark in the atlas: no key date stored · 12 of 12 of its relations lack claim-level evidence.
atlas representation · Describes the current Thinking OS representation, not the state of the world.
cross-field
10 within-field, 2 cross-field
Strengths & constraints
Constraints
- Evidence coverage currently thin in the atlas — few of its relationships carry claim-level evidence. atlas representation
- No dated history stored — the atlas records no key date for this concept. atlas representation
Conditions
- Read structurally — most of its relationships carry no external evidence yet, so claims here are graph-derived. structural
Dependency radial
What this concept builds on (left) and what it makes possible (right) — derived from dependency and causal relations.
What builds on this
1 concept build on this directly, 2 in total, across 4 disciplines.
Structural downstream reach along dependency edges — not a claim of historical necessity.
Seen through each discipline
How this concept sits in each of its fields — derived from its real connections in the graph, not asserted.
Through this lens it connects to Nervous system, Neural signal and Nucleus.
Through this lens it connects to Nervous system, Action potential, Neural signal and Cognitive neuroscience.
Technical detail
A neuron integrates thousands of synaptic inputs on its dendrites and soma; when the membrane potential at the axon hillock crosses threshold, a self-propagating action potential travels down the axon. Signalling is chemical at synapses (neurotransmitter release triggered by Ca²⁺ influx) and electrical along the axon, where myelination and saltatory conduction speed transmission. The neuron doctrine established that neurons are discrete cells, not a continuous network.
Check yourself
A quick check against a common misconception. Nothing is scored — picking the tempting-but-wrong answer just flags an idea worth revisiting.
Which statement is correct?
A stronger stimulus makes a bigger nerve impulse travel down a neuron.
Each action potential is all-or-nothing and the same size; a stronger stimulus makes neurons fire more often, not harder.
Look for: Learner thinks impulse amplitude scales with stimulus strength.
Related ideas to explore
Concepts that look related but are not yet connected here — candidates for a connection to reason about, not established links.
This idea also appears in…
The same structure shows up in other disciplines. These are real recurrences drawn from the graph — a starting point for asking “what carries over, and what changes?”
Networks50 disciplines · 37 concepts
Information36 disciplines · 32 concepts
Concepts
shares a mental model
shares a mental model
shares a mental model
shares a mental model
shares a mental model
shares a mental model
A neuron is a nerve cell that carries messages as tiny electrical signals. Neurons connect to each other in vast networks, letting you sense, think and move. Signals jump from one neuron to the next at tiny gaps called synapses.
A neuron transmits information as an all-or-nothing electrical impulse (the action potential) along its axon, then releases neurotransmitters across a synapse to the next cell. The pattern and strength of these connections encode learning and behaviour.
Mental models at work here
Networks
A set of parts connected so that a change in one can spread to others through the links.
Follow the links: who is connected to whom, and what can travel along those connections?
Information
Anything that reduces uncertainty. It can be encoded into a signal, sent across a channel, and decoded — and noise can corrupt it on the way.
Ask: what did the receiver not know before, and what does the message let them rule out?
- Connects 12 other ideas across 2 disciplines.
- A cross-disciplinary bridge — its connections reach into 11 other fields.
- Most of its connections are of the “Teaching link” kind.
- It exercises 2 reusable thinking patterns.
Derived from the graph’s real structure — observations, not a score.
Sources
- Wikipedia (English & German editions) verifiedmoderate evidence
- Wikidata verifiedmoderate evidence
- Biology 2e (OpenStax) (2018) verified