Scientists have detected which group of neurons are responsible for nicotine addiction, which opens up the possibility of new treatments. These neurons are located in the medial habenula (around the pineal gland) and in the interpeduncular nucleus (IPN). They contain receptors for nicotine. The habenula sends signals to the IPN to reduce the satisfaction caused by smoking but when the consumption of nicotine is chronic, these receptors are desensitized and the brain is unable to control consumption. Blocking these receivers …

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