7. How Does a Neuron Decide to Fire? ⚖️
Aug 24, 2026·
·
1 min read
Xander Chu
Key Question
How does a neuron decide whether to generate an action potential?
What You’ll Learn
- What excitatory inputs do
- What inhibitory inputs do
- What spatial summation is
- What temporal summation is
- What threshold means
- How the axon initial segment integrates incoming signals
Key Takeaway
A neuron does not respond to a single input in isolation.
It integrates many excitatory and inhibitory influences, and an action potential occurs when membrane voltage reaches threshold.
Next
Continue to What Are Ion Channels?
Authors
Xander Chu
(they/them)
Founder, XC Psych
Psychology student at UNSW exploring psychology and neurobiology from first principles, with a background in data science, machine learning, software engineering, and tennis coaching.