Inhibition (Physiological)

Reduction of the excitability of a nerve cell by impulses from other nerve cells (axons). The stimuli transmitted by the inhibited cell are less or completely absent.

The synapsen inhibitors prevent transmitted stimuli from becoming too strong. This inhibition is mainly used in the brain to suppress less important information. One example is the inhibitory effect of light stimuli on the retina on the adjacent cells. Weaker stimuli (of weaker light) are inhibited by strong stimuli (of the inhibitory synapses) of the neighboring cells. Thus a grey tone becomes even darker next to a light tone and a stronger contrast develops which makes the contours even more visible.

Inhibitory synapses usually dock to the cell body or the axon that transmits the excitation and thus reduce or prevent the transmission of signals.

https://de.wikipedia.org/wiki/Inhibition_(Neuron) _{(Wikipedia CC-by-sa-3.0)}