Anatomy : The Autonomic Nervous System and Weight Loss.
Why No One Diet Doesn’t Work For Everyone.
The following information has been gathered and compiled over a period of years, through personal experience, while traveling, teaching classes that include T’ai Chi, Qi Gong, herbal information, martial arts and other health related subjects. The article also contains feedback from students and anecdotal information from readers of my columns. The following are my opinions and deductions from those sources.
The autonomic nervous system (ANS) acts as a control, helping to maintain homeostasis in the body. Most of the ANS activities are performed without conscious control. The ANS controls the heart rate, digestion, perspiration, respiratory rate, salivation, dilation of the pupils, urination, and sex drive. The two ANS components are the parasympathetic nervous system (PNS) and sympathetic nervous system (SNS). These two are connected with the metabolic rate, which is what we’re interested in and will focus on.
The sensory arm is made of primary visceral sensory neurons. These sensory neurons monitor the levels of sugar in the blood, the chemical composition of the stomach and the contents of the gut, as well as other things. They also convey the sense of taste, which is a conscious perception.
The sympathetic nervous system is comprised of two sympathetic ganglia chains close to the spinal cord. The parasympathetic ganglia are located in close proximity to the target organ.
Sympathetic and parasympathetic divisions typically function in opposition to each other in an effort to keep the body in a state of homeostasis. The sympathetic nervous system is the accelerator and the parasympathetic division is the brake. The SNS functions in situations requiring quick responses. The PNS functions in situations not requiring immediate reaction. SNS is fight or flight and parasympathetic is rest and digest.
There are many instances when the two work together but we’re interested in weight reduction and metabolic rates and won’t delve into them here other than to say: if your a SNS type and eat a strict vegetarian diet you’ll be low on energy and if you’re a PNS type and eat a heavy diet of meat and protein, you’ll put on weight. Another interesting aspect of the two systems as far as metabolic rates are concerned is: the SNS stimulates digestion, and the PNS stimulates salivary gland secretion, which in turn contributes to making us feel hungry.
Even with the above sketchy information, we can see there are reasons why no one diet works for everyone. If you’re a slow metabolizer and eat foods better suited to someone with a fast metabolic rate. it won’t work for you. Someone who is SNS dominant and eats a primarily vegetarian diet will find they lack energy and endurance. There are more than two types and someone versed in metabolic typing can fill in the voids. My primary objective is to give the basic information and let the reader take it from there, if they care to.