Excitatory Pathways/Signaling

Excitatory pathways are neural communication routes in the brain that rely primarily on excitatory neurotransmitters — most notably glutamate — to stimulate activity in connected brain cells. Excitatory signaling is essential for alertness, learning, memory, and emotional intensity. However, when excitatory pathways are overly active or insufficiently regulated, the result can feel like heightened arousal, racing thoughts, sensory amplification, anxiety, or agitation. In mood disorders, like bipolar disorder, shifts in the balance between excitatory and inhibitory signaling can contribute to mood instability. Substances like THC can dampen certain excitatory pathways, which may temporarily reduce overstimulation but can also alter longer-term neural regulation.