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Limbic System
How the limbic system works in the brain Youtube
The limbic system is a collective structure that is part of the brain which involves many functions including short and long-term memory, emotions, behaviour, motivation, and olfaction.
The way emotions are expressed is generally under the control of the limbic system, and has a close relationship with the formation of memories, the limbic system has also been referred to as the paleomammalian cortex.
A limbic system cascade (where bio-chemicals are released throughout the body) can be triggered by the five senses (sight, sound, smell, taste and touch).
Determining negative (normal and subliminal) bio-chemical triggers can help find answers to metaphysical disorders (including: drug addiction, phobias, pain, hallucinations, fear and over-happiness/mania - see meditation psychosis), and is a good starting point to discover events that create an holistic dysfunction (illness).
The limbic system (and the vagus nerve) has a close connection with the endocrine and 
autonomic nervous systems promoting hormonal secretions throughout the body.
The limbic system works by influencing the endocrine and the autonomic nervous systems. The limbic system is connected with the nucleus accumbens, which can stimulate sexual arousal and the "high" some recreational drugs provide.
The limbic system structure consists of:
Piriform cortex - part of the olfactory system
Hippocampus - plays a central role in the consolidation of new memories
Entorhinal cortex - associated with memory
Orbitofrontal cortex - region of the frontal lobe involved in decision-making
Septal nuclei - structures that lie in front of the lamina terminalis, known as a pleasure zone
Amygdala - seated deep within the temporal lobes, and is related to a number of emotional processes
Nucleus accumbens - involved in reward, pleasure, and addiction
Hypothalamus - a center for the limbic system, connected with the frontal lobes, septal nuclei and brain stem reticular formation. It regulates a great number of autonomic processes
Mammillary bodies - part of the hypothalamus which receives signals from the hippocampus, from the fornix and projects the messages to the thalamus
Anterior nuclei of thalamus - collects input from the mammillary bodies. Associated with memory processing
Serious dysfunctional disorders associated with the limbic system, are epilepsy and schizophrenia.
Essential oils the limbic system and the olfactory bulb:
The part of the limbic known as the olfactory bulb (nerve you smell with) is located behind the nose and is the only major nerve that is exposed directly to air (via the nose and roof of the mouth).
Essential oils are made up of small volatile molecules which when released saturate the air and cling to the olfactory bulb to stimulate, sedate or influence the whole limbic system, the olfactory bulb when exposed to essential oils flooding the air is always affected, even if it's only subliminal unless the sense of smell is not working.
The olfactory bulb sends olfactory information to be processed in the amygdala, orbitofrontal cortex (OFC) and the hippocampus where it plays a role in encouraging emotions.
Odors can serve as reinforces or the punishers during the associative instruction process via amygdala thought associated learning.
Odors affecting the hippocampus contributes to the formation of episodic memory; the memories of events at a specific time or place.
Mixing Essential oils (aromatherapy)
Essential oils correctly mixed can have a profound or very subtle affect on the the limbic system and emotions to influence the way the brain behaves through hormonal secretions whilst also promoting positive brain wave functions.
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