From:  Advancements in electrochemical sensors for neurotransmitter diagnosis: innovations in sensitivity, selectivity, and real-time monitoring

 The function of neurotransmitters in humans.

NeurotransmitterMain functionsReferences
AcetylcholineMuscle contraction, memory, learning, attention[67]
DopamineReward, motivation, mood regulation, motor control[68]
SerotoninMood, sleep, appetite, digestion, memory[69]
NorepinephrineArousal, alertness, stress response, blood pressure regulation[70]
EpinephrineFight or flight response, heart rate, energy, alertness[71]
GABAInhibitory effect, reduces anxiety, relaxation, muscle tone[72]
GlutamateExcitatory effect, learning, memory, synaptic plasticity[73]
EndorphinsPain relief, pleasure, euphoria, stress reduction[4]
AnandamideMood, memory, pain regulation, endocannabinoid system[74]