Thankfully, PsyBlog recently pulled together a handy list of research-backed ways clever people lower their intelligence so you can avoid them. They include:. That bag of chips is bad for your waistline, but did you know it's also bad for your cognitive function? Other science shows your crappy snacks are probably also contributing to your sky-high stress levels. So off to the farmers' market or vegetable aisle with you.
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A PET scan of a year-old man's brain show plent y of high-activity areas in red. Credit: Jens But the tests that seemed to support this thesis were biased in favour of the young, say Ramscar and his colleagues.
So flawed, explains Ramscar in his blog , that in a meta-analysis of studies some of the alleged effects depend less on the age of the subjects, than on the size of the sample. The younger one can keep three balls in the air, 95 per cent of the time. The older one has five balls airborne, but drops one in 10 per cent of the trials.
Which is more accomplished? It depends on how you ask the question. What happens to our brains as we age is of crucial importance not just to science but to public policy. Many of these are known to cause fatigue and daytime drowsiness. Tranquilizers, sedatives, and sleeping pills slow down the central nervous system, causing diminished reaction time, and impair your ability to concentrate.
Antihistamines slow down reaction time and affect your overall coordination. Compare the following list of drug types to your current prescriptions to see if what you are taking may be affecting your thinking, and then speak with your doctor to determine whether alternatives with fewer mental side effects are available:. Over-the-counter medications. Decongestants can cause drowsiness, anxiety, and dizziness. Cold and cough medicines, antihistamines, pain relievers, diuretics, and remedies that prevent heartburn, nausea, or motion sickness can cause drowsiness or dizziness.
What's more, combining prescription medications with over-the-counter remedies can also cause cognitive problems. Speak with your local pharmacist to determine if any of these remedies is affecting your thinking. Parasites, bacteria, and viral infections. Parasites and other microbes enter the body and often excrete toxins to increase their chance of survival. These toxins change blood acidity, allowing the parasite to multiply in a perfect host environment.
At the same time, toxic excretions can cross the blood-brain barrier and create inflammation in the brain, affecting your concentration and comprehension and creating brain fog. Degenerative disorders. Serious illnesses associated with aging including multiple sclerosis, neurodegenerative illness, Huntington's disease, ALS, and Pick's disease , glaucoma, vascular diseases, stroke the second leading cause of MCI , brain tumors, obesity, organ diseases including endocrine, liver, and kidney , blood sugar imbalances, or hormonal loss can also affect your ability to think clearly.
Anyone with a brain chemical imbalance will experience physical changes. Diseases of the body also affect brain function. Physical trauma. This category can include recurrent head trauma, concussions, whiplash, battering, sports injuries, or injury due to child abuse, car accidents, or falling. Brain trauma has a cumulative effect: Each event builds on the previous one, directly affecting memory and cognition in both the short and long term.
Even minor traumas add toward dementia. All the hits we received in our youth -- from fighting with siblings to falling off a bike -- pile up and later affect us, long after the physical bruises have healed. I can guarantee that everyone who is diagnosed with cognitive decline has experienced some of them.
For example, 75 percent of all people will have a mild concussion at some point during their life and will unknowingly develop severe brain chemical loss that will affect their thinking and personality.
A concussion can be caused by a direct blow to the head, face, or neck, or elsewhere on the body, that leads to an impulsive force transmitted to the head. Concussions typically result in a rapid loss of neurological function that is short-lived and resolves spontaneously.
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