Researchers Find Clue to SIDS Early Detection

SpaceAdmiral writes "The Globe and Mail is reporting that scientists have found babies who die from Sudden Infant Death Syndrome (SIDS) tend to have an abnormality in their brain stem. By linking SIDS to a biological cause, it may now be possible to test for the abnormality and treat babies at risk of SIDS."

Comments

Nope...

[Junta]

Natural selection is, in the most basic form, eliminating those traits that do not survive in whatever the current environment is. In this case, assuming that a defect transforms from near certain fatality to usually treatable, even if through human advancement of the 'environment', the environment simply has changed to not weed out that attribute, one way or another.

Really, if you want to have the heartiest gene pool with respect to the whole natural selection scheme of things, you keep everyone alive you can within reason, even if no apparent benefit can be objectively realized for their apparent defect. The whole deal is that when the environment changes, bizarre things can happen and the more genetic diversity your population has, the more able it is to survive radical changes.

An example is sickle-cell anemia, most common people with an incomplete grasp of natural selection would think 'that sucks, let nature eliminate that gene from the pool!'. However in the incomplete dominance model it happens to behave, a person heterozygous for sickle cell anemia happens to be much more resistant to malaria.

In the case of this article, let's assume some neurological pathogen suddenly becomes ubiquitous to the human environment, and somehow the brain stem 'defect' shields those with the trait. Assume this preliminary research is correct and leads to a cure for SIDS, for the sake of discussion. You have a hearty population with a now harmless defect that would be the only survivors. If SIDS wipes out that 'defect' and such a weird pathogen came, the species goes extinct.

To be trekkie for a moment, a good demonstration is when the TNG crew came upon a planet that eliminated all defective conceptions to not deal with the associated problems. However, their planet was saved from obliteration based on technology in Geordi's visor, which never would have come about in a society where they avoided having to make such a device. The principle is interesting fodder for science fiction, and that I think illustrates well the pitfall of 'let only the best go on'. Best is always relative to the current status quo, which is never unchangeable.