Our brain is steadily engaged in soliloquies. These internal communications are usually also bombarded with external sensory events. Hence, the impact of the two neuronal processes need to be permanently fine-tuned to avoid their imbalance. A team of scientists has revealed the role of the neurotransmitter serotonin in this scenario. They discovered that distinct serotonergic receptor types control the gain of both streams of information in a separable manner.
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Source: ScienceDaily