Integration
Integration
When neurotransmitters communicate an inhibitory message to the postsynaptic neuron:
Excitatory and inhibitory messages. Excitatory messages increase the likelihood of a postsynaptic neuron firing an action potential, while inhibitory messages decrease this likelihood.
The neuron adds up all the excitatory and inhibitory inputs and fires when they reach its threshold of excitation.
Synaptic integration in a neuron involves the summation of excitatory and inhibitory signals from multiple synapses. If the overall excitatory input surpasses the inhibitory input, the neuron is more likely to generate an action potential and propagate a nerve impulse. Conversely, if the inhibitory input dominates, the neuron is less likely to generate an action potential.
The type of neurotransmitter.
Every time neurotransmitter is released from the presynaptic neuron it generates an excitatory post synaptic potential(EPSP) in the postsynaptic neuron. When the EPSP is greater than the threshold for excitation an action potential is generated.
excitatory message
Dopamine acts on the postsynaptic membrane by binding to dopamine receptors, which can lead to changes in the postsynaptic neuron's electrical activity and neurotransmitter release. This can modulate various functions in the brain related to reward, motivation, movement, and emotion.
The simplest sense, the all-or-none principle of neuronal firing means that a neuron will either fire or it won't, there is no "half" firing. When a neuron receives excitatory input.
A.