posted on Apr, 26 2010 @ 07:05 PM
Gross anatomy of the brain doesn't change but neural pathways, functions, and structure are changing during neuroplasticity and during the life time.
It is not gross changes to overall brain anatomy but they are significant.
The leaders of the field write good grants and get more money. Doesn't mean other people "not mentioned on wikipedia" aren't looking at it too.
Here are some peer reviewed articles and studies on amygdala neuroplasticity. It changes according to stressers much like the rest of brain. Reacting
and changing to external, intracellular, and extracellular factors.
Adamec, R., and B. 2000. Young. Corticotropin releasing factor and neuroplasticity in coc aine addiction. Neurosci Biobehav Rev. 24:705-23.
Bergstrom, H.C. 2010. Chronic nicotine exposure produces lateralized, age-dependent dendritic remodeling in the rodent basolateral amygdala. Synapse.
Drevets, W.C. 2004. Neuroplasticity in mood disorder. Dialogues in Clinical Neuroscience 6: 209.
Holder, M.K., and J.A. Mong. 2010. Methamphetamine enhances paced mating behaviors and neuroplasticity in the medial amygdala of female rats. Horm
Li, He, et al. 2005. Neuroplasticity and Calcium Signaling in Stressed Rat Amygdala. US Gov. Report.
McEwen, B.S., and S. Chattarji. 2004. Molecular mechanisms of neuroplasticity and pharmacological implications: the example of tianeptine. Eur
Pereno, G.L., and C.A. Beltramino. 2010. Timed changes of synaptic zinc, synaptophysin and MAP2 in medial extended amygdala of epileptic animals are
suggestive of reactive neuroplasticity. Brain Res 1328:130-8.
Rademacher, D.J., et al. 2010. Amphetamine-associated contextual learning is accompanied by structural and functional plasticity in the basolateral
amygdala. J Neurosci. 30: 4676-86.
Tye, K.M. 2010 Methylphenidate facilitates learning-induced amygdala plasticity. Nat Neurosci 13:475-81.
I liked the last one. Learning induced amygdala plasticity. The brain is very plastic although on a macro scale the changes are minute and do not
overall change the areas of the brain drastically.
I never said genetics had anything to do with homosexuality or the cause. I was actually saying that brain characteristics of homosexuals do not
represent a genetic relationship. I said homosexuality could be passed down genetically and still survive even though two males or two females could
not produce offspring.
I imagine that there are genotypes that increase the chances of homosexuality. Also there are certain social and developmental factors involved.
The ah-ha moment theory would be cool to look into. So far I know that the neuroplasticity is often associated with different neurotransmitters and
chemicals. The production of these chemicals from certain activities or emotion (stress, learning, happiness) ultimately affect neural wiring and
pathways (neuroplasticity). however I haven't found if any of "ah-ha" moments are the direct product of changes in neural pathways. It would be
cool but tough to do.
Who did I call a heratic?
About the politically correct thing. Homosexuality is a touchy subject. I don't care what people do with their lives as long as it doesn't
negatively affect me. People get offended easily and I am just trying to explain the facts and research i scientific terms. Where were you going with
this besides explaining political correctness?
Yeah skin pigmentation you are quite wrong. Black skin is the ancestral trait. We evolved out of africa leaving the areas where dark skin
pigmentation is necessary to protect against UV. Lighter skin pigmentation evolved in milder climates and lower altitudes to allow enough vitamin d
Harding, Rosalind M., et al. 2000. Evidence for variable selective pressures at MC1R. American Journal of Human Genetics 66: 1351–1361.
Jablonski, N.G., and G. Chaplin. 2000. The evolution of human skin coloration. Journal of Human Evolution 39: 5
[edit on 26-4-2010 by Grant123]