Stimulation in the human brain all happens in little terminals known as axons, dendrites and the synaptic space in between. Synapses allow neurons to form circuits within the central nervous system - these guys are a little over stimulated. Some are giddy and excited, some are totally scrambled and done-for. How was your weekend? Original illustration.

Impress the bio teacher, neurologist, psychiatrist or chemically enhanced lovely person in your life!

Shown in foreground: dove gray on black; charcoal; silver.