WASHINGTON (Reuters) - One of the stops on this year's popular White House tour of holiday decorations is the collection of Christmas cards from previous presidents and first ladies. But noticeably missing is the card from 1963.
It is the rarest and most tragic of the presidential cards because it was not sent out after President John F. Kennedy was assassinated in Dallas that November 22.
Providentia reports on a study that adds to the controversey over the diagnosis of postconcussion syndrome.
Using a sample of 90 traumatic brain-injured admissions to a Level 1 trauma hospital and 85 non-brain injured trauma controls, participants were given a battery of neuropsychological and psychological tests and a PCS [postconcussion syndrome] checklist. Statistical analyses were used to predict acute PCS after 5 days postinjury. The results indicated that diagnosis of acute PCS was not specific to mild traumatic brain injury (mTBI 43.3%; controls 43.5%). Pain was found to be a significant factor but the the strongest predictor for acute PCS was previous history of affective or anxiety disorder...
The authors concluded that there is a high rate of acute PCS in both mTBI and non-brain injured trauma patients and that PCS was not found to be specific to mTBI. For this reason, the use of the term PCS may be misleading as it incorrectly suggests that the basis of PCS is a brain injury.
The study was published in the August issue of the Journal of Neurology, Neurosurgery and Psychiatry.
In a study published in PLOS Biology, Duke researchers Jessica Cantlon and Elizabeth Brannon presented strong evidence of rudimentary, nonverbal mathematical abilities in monkeys.
Adult humans possess mathematical abilities that are unmatched by any other member of the animal kingdom. Yet, there is increasing evidence that the ability to enumerate sets of objects nonverbally is a capacity that humans share with other animal species. That is, like humans, nonhuman animals possess the ability to estimate and compare numerical values nonverbally. We asked whether humans and nonhuman animals also share a capacity for nonverbal arithmetic. We tested monkeys and college students on a nonverbal arithmetic task in which they had to add the numerical values of two sets of dots together and choose a stimulus from two options that reflected the arithmetic sum of the two sets. Our results indicate that monkeys perform approximate mental addition in a manner that is remarkably similar to the performance of the college students. These findings support the argument that humans and nonhuman primates share a cognitive system for nonverbal arithmetic, which likely reflects an evolutionary link in their cognitive abilities. It's open access so you can read the rest here...
Archaeologists in Jordan discovered a bag containing a 14,000-year-old toolkit that belonged to a hunter-gatherer. Describing the contents of the bag, archaeologist Phillip Edwards said "there was a sickle for harvesting wild wheat or barley, a cluster of flint spearheads, a flint core for making more spearheads, some smooth stones (maybe slingshots), a large stone (maybe for striking flint pieces off the flint core), a cluster of gazelle toe bones which were used to make beads, and part of a second bone tool." Read more...
I'm not sure why I felt compelled to post this. Maybe it has something to do with my affinity for hardware stores.