Toxicants are substances that can cause harm to living organisms through chemical interaction. Neurotoxicants specifically target the nervous system and can disrupt neuroplasticity. Chemicals such as lead, mercury, and certain pesticides can impair the brain's ability to form new synapses, inhibit neurogenesis, and alter neuronal communication. For instance, lead exposure is known to affect synaptic plasticity, which is critical for learning and memory.
