Electrophysiology Of The Neuron -

). This triggers an , a rapid spike in electrical activity that travels down the axon.

: Sodium channels close and potassium channels open, allowing K+cap K raised to the positive power to exit and bringing the voltage back down. Electrophysiology of the Neuron

: The voltage briefly dips below the resting level before stabilizing. ). This triggers an

When a neuron receives enough stimulation, it reaches a critical "threshold" (around making it more positive.

This process is "all-or-nothing"—the signal doesn't get "stronger" with more stimulus; instead, the neuron fires more frequently . How We Study the Brain's Electricity

: Voltage-gated sodium channels snap open, allowing Na+cap N a raised to the positive power to flood into the cell, making it more positive.