The neurotransmitter most likely impliated in generalized anxiety disorder(GAD)is
gamma-aminobutyric acid (GABA).
GABA is the primary inhibitory neurotransmitter in the central nervous system and plays a crucial role in regulating neuronal excitability. Studies have shown that individuals with GAD have lower levels of GABA in certain areas of the brain, leading to increased neuronal excitability and heightened anxiety levels. Therefore, medications that enhance GABAergic neurotransmission, such as benzodiazepines, are often prescribed to help alleviate symptoms of GAD.