November 1st, 2007 by Dr. Val Jones in News
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A recent research study suggests that as many as 7% of adults over 45 have had a stroke without even realizing it. Researchers performed brain MRI scans of 2000 “normal” (asymptomatic) Dutch men and women between the ages of 45 and 96, and found that 7.2% of them (145 people) had evidence of an infarct (stroke), 1.8% (36 people) had small aneurysms, and 1.6% (32 people) had benign tumors (usually a small malformation of the blood supply to the brain).
Interestingly, they also found one person with a primary brain cancer, one person with a previously undiagnosed lung cancer that had metastasized to the brain, one person with a life-threatening subdural hematoma (brain bleed), and one person with an aneurysm large enough to require surgery. So altogether, they found 4 people out of 2000 who needed urgent medical intervention.
Although the authors of the article emphasized the point that many “normal” people have harmless brain abnormalities – I was a bit surprised by the fact that they found 4 asymptomatic people unaware of a ticking time bomb in their brains.
Keep in mind that the study was conducted on middle class Caucasian adults in the Netherlands – so we cannot generalize these findings to more diverse populations. But I do think it’s a bit of an eye-opener.
MRI scans are quite expensive (well over $1000 in most cases) and are therefore not offered to the general population as a screening test. But it does make you think about saving up for one. Your radiologist may find something unimportant, or she may find something that you hadn’t bargained for. Or maybe one day the technology will be inexpensive enough to offer as a screening test in a primary care setting. But that’s not going to happen any time soon.This post originally appeared on Dr. Val’s blog at RevolutionHealth.com.
October 21st, 2007 by Dr. Val Jones in Expert Interviews
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As Halloween approaches, I was asked a really interesting psychological question from Lauren (of Love, Lauren fame) at Revolution Health. She asked, “Why do people like to be frightened? I don’t like horror movies or haunted houses, but some people love that stuff. Why, Dr. Val?”
I scratched my head and looked at her for a moment as images of Saw, Freddie Kruger, and Jason Voorhees (the only Dutch Halloween “slasher” protagonist I know) went through my mind. I offered an unsatisfactory reply, and promised to take this up with someone more learned in the ways of fear. Luckily for me, Dr. Andrew Gerber– a thoughtful psychiatrist whose research focuses on brain response to emotion (how perfect) was up to the task. Here’s what he had to say:
Our enjoyment of being afraid is a wonderful example of how the human mind works in mysterious ways that are often not immediately transparent to our own introspection. Psychiatrists, psychologists, and cognitive scientists are coming up with new ways to study exactly these sorts of things (located in a psychological structure called the “dynamic,” “adaptive,” or “cognitive” unconscious) and have a variety of possible explanations.
1. We like to feel things strongly.
Even if something has a negative part to it, it can be overridden by our preference to feel something as opposed to nothing. This may be the same phenomenon that drives our curiosity (even when it gets us into trouble, like a cat), our restlessness, or the discomfort of boredom. Increasing evidence from brain imaging studies tells us that a large part of our brain is devoted to processing intense emotion. It’s pretty likely that these regions were very important in our evolution and survival as a species.
2. We love the experience of a building up of tension and relief.
The best part of all about being scared on Halloween or in a scary movie is the huge relief at the end when we or our hero emerges safe and sound. A part of us remembers the whole time that relief is coming, so the tension part is worthwhile. There are lots of experience in our life that have the same kind of tension and relief pleasure to them – for example, missing a loved one and then seeing them, being hungry and eating a delicious meal, or being really tired and then getting to relax. You might say that the more the tension builds, the more the relief feels good. Brain imaging studies show that motivational systems located in the deep and archaic part of the brain operate on a tension and relief principle. When this works well, we feel motivated to go about the business of our lives. This very system can go awry in disorders such as depression and drug addiction.
3. We like to work through old situations and make them come out better.
For better or for worse, humans are consummate problem solvers and when things didn’t go well in the past, we like to replay the situation and have it come out differently. We all recall the experience of being scared as a child when it didn’t feel so good. This makes it all the more fun as older children or adults to replay that experience but this time to have the experience come out in a more positive way.
And there you have it – our brains crave “tension and release” to feed parts of our large emotion-processing centers, we like to problem solve in controlled environments where the outcomes are not truly dangerous, and we derive pleasure from strong emotions. That being said, I prefer action flicks to the horror movies myself. Though I’m a sucker for a good Sci-Fi thriller. What about you? What’s your favorite “tension release” movie?This post originally appeared on Dr. Val’s blog at RevolutionHealth.com.
October 18th, 2007 by Dr. Val Jones in News, Opinion
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You might have seen the recent news about the middle school in Maine – King Middle School, in the Portland school district – that is planning to provide birth control to pre-teens, without requiring explicit parental consent. School officials argue that this will help to prevent pre-teen pregnancies, and estimate that at least 5 out of 135 of their 11- to 13-year-old female students are sexually active already.
While I absolutely sympathize with the desire to avoid pre-teen pregnancies, and I do understand that there is a reality here that some very young children will become sexually active at the tender age of 11, I personally do not support giving pre-pubescent girls hormone-altering tablets. We do not have good studies demonstrating the safety of such therapies in children, and until we do it’s just not medically sound to be offering this treatment. (For example, we don’t know what extra estrogen does to early breast buds, or whether there’s an increased risk for developing breast cancer later on.)
I also think that 11 year olds are not physically and emotionally prepared for sexual intimacy – and the prematurity of this event could be quite harmful for their psyche. We know that 11- and 12-year-old brains are not fully developed to think the way adults do, so there’s really no telling what impact it could have or what long term psychological effects might result.
Apparently sex before the age of 14 is illegal in Maine, so (although there’s no doubt that it may happen prior to that age) it seems that the state’s legal system is not in step with their school system, and that needs to be looked at. It is inconsistent to claim that an activity is illegal for children and then enable it with tax dollars.
I suppose that education about the use of condoms and access to them (without aggressive promotion of them) may be acceptable at this age. After all, condoms can prevent STDs and don’t have medical effects on the body as a whole. But my plea is that parents take the lead here – and educate your children about the risks of STDs, pregnancy, and the emotional damage that premature sex can have on a young person. Advocate for abstinence as a first choice, explain that condoms are non-negotiable, and try to help them turn their focus away from sex and towards more age-appropriate endeavors.
A new Dove advertising campaign asks parents to talk to their kids before the beauty industry does, and I think the same goes for sex and the media. Today’s parent must launch a preemptive strike against the over-sexualization of children, or risk having their 11 year olds taking estrogen patches from a school nurse without their consent.This post originally appeared on Dr. Val’s blog at RevolutionHealth.com.
October 16th, 2007 by Dr. Val Jones in News
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Several frozen hamburger meat recalls have been issued in the past month. First it was the Cargill. Inc. plant in Butler, Wisconsin (supplying Sam’s Club) recall and now it’s the J&B Meats, Coal Valley, Illinois (supplying Tops and Sam’s Choice Brands).
So how does this meat get contaminated? As I mentioned in an earlier blog post about cows, they are kind of dirty creatures. They tend to stand around in manure and flick it all over themselves. In addition, there are certain intestinal bacteria that colonize them (including a certain type of E. coli, called 0157:H7) that are harmless to them, but are very harmful to humans. If their manure is used to fertilize veggies (or gets into the veggie’s water irrigation supply) – spinach poisoning can result. If the bacteria get into hamburger meat (as can happen during the butchering process and meat grinding) beef recalls may be in order.
E. coli 0157:H7 poisoning is scary because it can cause life-threatening illness (bloody diarrhea and kidney damage), especially in the young and immunocompromised. There are no antibiotics to treat it, and so the best “treatment” is prevention.
Keep in mind that the vast majority of meat is not contaminated with this bacteria, and that the small risk is usually associated with hamburger meat in particular. Ground beef (as you can imagine, though it’s a little disgusting to think about it) is more likely to have been in contact with the bacteria-laden intestines of the cow, since many different parts of the animal are used and ground into hamburger. It is much less likely for a whole steak, for example, to be contaminated with E. coli.
According to the USDA, one cannot rely on meat color to be sure that a sufficiently high temperature has been achieved in the cooking process. The best way to be sure that your hamburgers have been hot enough to kill any potential bacteria lurking therein is to use a thermometer and to make sure that the center of the meat reaches 160 degrees Fahrenheit.
So the take home message is this:
- Ground beef may be contaminated with E. coli bacteria, especially if it’s purchased at Sam’s Club or Tops.
- Regular beef is less likely to be contaminated.
- Don’t rely on meat color to ensure that it’s safe to eat.
- Cook all red meat to 160 degrees Fahrenheit to be sure that any bacterial contaminants are killed.
- See your doctor immediately if you have bloody diarrhea, fever, or other symptoms of E. coli poisoning.
This post originally appeared on Dr. Val’s blog at RevolutionHealth.com.
October 15th, 2007 by Dr. Val Jones in News
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I was always taught that chlamydia (a bacterial sexually transmitted infection) could cause infertility in women but didn’t affect men at all. Now it seems that male fertility may also be affected by chlamydial infections.
New research from Spain suggests that chlamydia can damage sperm DNA as well as their swimming ability. In fact, DNA damage in sperm from men infected with chlamydia is 3 times higher than in uninfected sperm. Also, fertility rates my be reduced by as much as 73% in couples infected with chlamydia.
Fortunately for men, their new sperm (produced after antibiotic treatment for chlamydia) appears to be normal/unaffected. For women, the damage is permanent. The crafty chlamydia bacteria crawl up into the fallopian tubes and create such an inflammatory reaction that the tubes are often scarred for life. Eggs released by the ovaries may be blocked from entering the uterus from narrowed and scarred fallopian tubes. This is why one chlamydial infection can put a woman at increased risk for ectopic pregnancy, miscarriage, infertility, and chronic pelvic pain.
It is estimated that as many as 1 in 10 people ages 18-25 are actively infected with chlamydia (in the US and Britain). The treatment can be as simple as one dose of oral antibiotics (1g of Azithromycin). Since chlamydia can be asymptomatic in men and women, and hard to diagnose in men in particular – I personally would recommend having both partners take a dose of Azithromycin before having unprotected sex in a monogamous relationship. Obviously, it’s always far better to have protected sex – but since 1 in 10 people have this infection, it seems pretty clear that people are not using condoms all the time. If you want to preserve your fertility – be vigilant about this infection. The good news here is that it’s easy to treat and can be prevented.This post originally appeared on Dr. Val’s blog at RevolutionHealth.com.
