Axon hillock

Definition

The axon hillock is a specialized part of the cell body (soma) of a neuron that connects to the axon, where it plays a crucial role in initiating nerve signals. It acts as the decision point for generating action potentials, determining whether or not the neuron will fire.

Related terms

Neuron: A neuron is a nerve cell that transmits electrical and chemical signals throughout the nervous system.

Action Potential: An action potential is a rapid rise and fall in membrane voltage that constitutes a signal transmitted along neurons.

Synapse: A synapse is a junction between two neurons or between a neuron and muscle cell where neurotransmitters are released to transmit nerve impulses.