Are Food Allergies Linked to Autism? - An important hidden link between the CNS and immune system

Author // Sidney MacDonald Baker, MD

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Are Food Allergies Linked to Autism?
An important hidden link between the CNS and immune system
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An important hidden link between the CNS and immune system

Look at it this way: the cells of both systems arise from the same origin in the neural crest of the embryo. Both systems contain the only cells of our bodies that exist as permanent, undividing cells from infancy to old age. (Such long-lived cells are a subset of lymphocytes, the otherwise ephemeral cells of the immune system.) Both systems have the job of perceiving the environment. The CNS takes in the big world of our senses, our every day cognitive experience. The immune system takes in the microscopic or molecular world of that has to do with “sensing” the constant presence of friendly or unfriendly cells (such as cancer), germs, food molecules, and toxins.

The chemistry of the immune system’s perception of its environment is not very different from our nose smelling bread baking in the oven. However, we have a direct experience of the bread while our immune system only makes us aware of its activities when something seems to be quite wrong, and the message that something is wrong may be delayed or obscure. The memory of your fifth birthday party when your friend Jeffrey spilled purple juice all over your new sneakers is in your CNS. That same week, when the doctor gave you your shot against tetanus, diphtheria, and whooping cough, the enduring memory of the “taste” of those germs was evoked in your immune system where it remains today. The birthday and the immunization are stored differently in you body, but functionally they are come under the same heading: perception and memory.

Another important link between the CNS and immune system

Perception and memory are the basis for recognition. “Recognition” is a term we use interchangeably to describe the day to day activities of both our CNS and our immune systems. Finally, both of these two systems share the capacity for this mysterious process called sensitization, which is, in a way, an inconvenient or painful alteration of the memory and recognition process. Viewed from this perspective, it is not surprising that children who have problems taking in and processing the world express that problem on both the cognitive and immune levels. They are really just different aspects of the same underlying mysterious disorder.

We try to help our children organize and integrate their cognitive world by imposing a certain simplified order. Such order may take the form of repetitive behavioral and linguistic exercises or efforts to modify responses to sensory input (i.e., desensitization). On the immune level we try to impose a simplified order by avoidance of, or desensitization to, offending foods and inhalants. This applies whether the mechanism of the reaction to foods, for example, is “allergic” within the academic definition of the word or “intolerant” within a notion that covers a variety of mechanisms, including the mischief caused by certain peptides derived from gluten and casein.

Helping a picky, hypersensitive child

So you have a picky kid. Your job is to help him or her learn better picking. If he or she chooses to limit his or her activities to monotonous behavior, you try to broaden his or her cognitive experience by picking and presenting other, more useful, kinds of stimuli. If he or she is sensitive to tastes, touch, smells, sights, or sounds, you take steps to help him or her integrate and become less painfully sensitive to these stimuli. If your kid’s immune system is picky, your job is to find the stimuli that are bothersome, and present ones that are not mischievous.

How important is the food allergy link to children?

When you have lots of other things to think about, should you change the diet of a child who has decided to live on french fries, smooshed bagels, chocolate milk, pretzels, Twinkies and diet coke, rejecting all alternatives with an iron will? Yup! And when you get over the hump, you are likely to be rewarded with changes in sleep, behavior, attention and “sensitivity” that make the struggle worth it. There are several ways of checking for food allergy. Trial and error changes in diet are probably the most important diagnostic tool.

Pathways Issue 21 CoverThis article appeared in Pathways to Family Wellness magazine, Issue #21.

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