Sunday, April 15, 2007
crapping out...
The Day After A Stressful Event, Rats Lose Brain Cells
Guys,,,,, A single, socially stressful situation can kill off new nerve cells in the brain region that processes learning, memory, and emotion, and possibly contribute to depression, new animal research shows.
yup you heard it right,,,
Researchers found that in young rats, the stress of encountering aggressive, older rats did not stop the generation of new nerve cells--the first step in the process of neurogenesis. But stress did prevent the cells, located in the hippocampus, from surviving, leaving fewer new neurons for processing feelings and emotions.
The hippocampus is one of two regions of the brain that continues to develop new nerve cells throughout life, in both rats and humans. The reduction of neurogenesis could be one cause of depression, says senior author Daniel Peterson, PhD, of the Rosalind Franklin University of Medicine and Science, near Chicago. His team reports their findings in the March 14 issue of The Journal of Neuroscience.
"This is strong evidence that the effects of social stress on neurogenesis occur after a delay of 24 hours or more, providing a possible time window for treatment after acute episodes of stress," says Henriette van Praag, PhD, of the Salk Institute for Biological Studies.
When Peterson and his research team put a young rat in a cage with two older rats for 20 minutes, the resident rats quickly pinned down and, in many cases, bit the intruder. The team reported that intruder rats were fearful and acted depressed around the bigger, more mature animals and had stress hormone levels six times as high as young rats that didn't experience a stressful encounter.
Examining the rats' brains under a microscope, the scientists discovered that even with high levels of stress hormones, the young, stressed rats generated as many new cells as their unstressed counterparts. Previous research had led some to think that hormone levels played a role in blocking the generation of new cells or caused them to die early on. But a week after the encounter, the team found that only a third of the cells generated under stress had survived. Long-term survival of nerve cells was also compromised: When Peterson's team marked newborn cells in the hippocampus, subjected rats to stress a week later, then examined brain tissue at the end of a month, they counted a third fewer fully developed nerve cells.
"The next step is to understand how stress reduced this survival," says Peterson. "We want to determine if anti-depressant medications might be able to keep these vulnerable new neurons alive."
The work was supported by a grant from the National Institute on Aging at the National Institutes of Health.
HALA!!!!!! HOW MANY DEAD BRAIN CELLS THERE IS!!!!????
Thursday, April 12, 2007
no apologies needed
i still listen to monster radio (remember dax and mam silverio) rx 93.1's morning rush! i still wasn't able to grow out of it i guess. chico and delamar seem to entertain me more and more! hahaha! maybe because i understand what they're talking about more now than back in my elementary days! hah! i started listening to them when i was in second year high school and to my surprise, that was their third year of airing! so, it has been almost 8 years already.. although i wasn't able to listen religiously, when it's time for their show and i have means to listen to the radio and choose the station, i would turn the dial towards their program.
i guess i won't be tired with their funny antics and how they view life and their points of view that most of the time i lack of! like all rushers, whenever i'm listening to them i would need to stop myself from laughing or even having that big grin, specially when i'm using my phone to listen to them! so far, i have been successful.. but it's really hard and almost painful.. hah!
i don't listen to other radio stations really, so, i'm not able to get a dose of their abuse of the radio industry.. haay.. i'll take your word for it, beng, besides, between us, you would be the expert here. haaay.. i really wanted to take up mass communication and really thought the fun that it would bring.. but oh, well.. engineering swept me off my feet that time. i guess, it still does. it's just too bad i still can't go back to school. but, eventually i will.. i hope.. whatever!
so, there, another crap.. let's just keep the crap flowing 'eh?!
Wednesday, April 11, 2007
sure there is,,
its just that im listening online to magic right now... hehhehe
sure there is,,
its just that im listening online to magic right now... hehhehe
from beng..
i'm not sure if i would be able to come up with a theory as well.. but maybe i have, i'm just not to sane to notice. bwhahahah!ANOTHER OF BHENGS THEORY (sfx :mad laughter pls and thunder!!)
we all think and accepted the fact that people
make mistakes,,, and before i used to tell my
self that in order to survive the dangerous and
mossy jungle of human relationship, one must
learn to admit that sometimes we are the
mistakes that people who became dear to us
commit.and it takes gutts to admit that in you
hangs a placard that tells the whole world that
hey world!! i am his/her mistake!!! crucify me!!but now i defy that former theory of mine,,,
so why burden yourself thinking about mistakes
this time i came to realize that we actually do
not commit mistakes.. the term mistake and if i
may suggest thenn i consider it politically
wrong... hehehe... kidding aside... we dont make
mistakes,,, we make choices... again i say not
mistakes... the term mistake is determined
whether by set of standards rules and anwer
keys,,, but come to think of it.. in life there
are no definite standards on how to one is
supposed to be running his/her life. wat hurts
us and what makes us sad or makes us feel
uncomfortable and anything in between makes us
think that its because of that mistake,,. but
no... its called consequences, end result end
product that one must have to face. why? because
its a choice that you made maybe alone or with
another... but never a mistake... its a choice.
that would eventually eat you and consume you?
and why did we ever thought of that?? hehehhe
anyone whose braincells and neurons agree with me
or anyone was led astray by this feel free to
send me a message or post something that would
either atest or defy this. warning..this just one
of my few and occassional theories.. and lets all
be guiged,, ladies and gentlemen... that theories
reamin to be true until proven wrong... ciao!!!