I am working on BCI with SSVEP. Is it known how SSVEP responce depends on visual angle to the stimulus from the eyes? Which angle can be and which can not if I want to see stable and pronounced SSVEP responce? Any dependences of the visual angle to SSVEP?

When an electric signal reaches a chemical synapse, the signal is transmitted using neurotransmitters. Afterwards, the neurotransmitters are removed from the synaptic cleft. My question is whether it happens in a normally functioning brain that neurotransmitter concentrations in the synaptic clef...

Serotonin reuptake inhibitors (SRIs) act as reuptake inhibitors of serotonin by blocking the action of the serotonin transporter (SERT) which, according to Wikipedia, leads to an increase in serotonergic neurotransmission. Now this book summarizes serotonergic neurotransmission as follows: [...