1. Chemical substances produced by or active in the nervous system, especially neurotransmitters and other molecules that regulate brain function and nerve signaling.
Usage: Usually used in plural form; Common in neuroscience and medical contexts

Examples

• Dopamine and serotonin are neurochemicals that affect mood and behavior.
• The brain releases neurochemicals that help transmit signals between nerve cells.
• Imbalances in neurochemicals can contribute to depression and anxiety disorders.
• Researchers study how neurochemicals influence learning and memory.
• Certain medications work by altering neurochemical levels in the brain.
• Exercise increases the production of beneficial neurochemicals like endorphins.