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Jan 11, 2006

From Molecular Biology to Anti-aging Cognitive-Behavioral Practices

From Molecular Biology to Anti-aging Cognitive-Behavioral Practices: The Pioneering Research of Walter Pierpaoli on the Pineal and Bone Marrow Foreshadows the Contemporary Revolution in Stem Cell and Regenerative Biology.

Ann N Y Acad Sci. 2005 Dec;1057:28-49

Authors: Bushell WC

Evidence is accruing that a cognitive-behavioral regimen integrating cognitive techniques (meditation-based anti-stress, anti-inflammatory techniques, others), dietary modification ("dietary restriction" or modified dietary restriction), and certain forms of aerobic exercise, may prolong the healthy life span in humans. Recent research has identified some of the likely molecular mediators of these potentially broad-ranging, health-enhancing and anti-aging effects; these include DHEA, interleukins -10 and -4 (IL-10, 1L-4), and especially melatonin. Relatedly, what some are calling a revolution in biology and medicine has been emerging from research on stem cells and regeneration processes more generally. Dogma regarding limitations on the regenerative capacities of adult vertebrates is being cautiously yet enthusiastically revised in the wake of rapidly accumulating discoveries of more types of adult stem cells in mammals, including humans. For example, a recent review by D. Krause of Yale concluded that "in the [adult] bone marrow, in addition to hematopoietic stem cells and supportive stromal cells, there are cells with the potential to differentiate into mature cells of the heart, liver, kidney, lungs, GI tract, skin, bone, muscle, cartilage, fat, endothelium and brain." In addition, very recent studies have shown that DHEA, ILs-10 and -4, and melatonin all possess potential regenerative, including stem cell-activating, properties. More than a quarter of a century ago, Walter Pierpaoli initiated a series of extraordinary studies that demonstrated in experimental animals the potential for dramatic regeneration associated with changes in the pineal gland and bone marrow. This appeared to be not only retardation of aging, but also its reversal. Furthermore, as Pierpaoli was attempting to understand both anti-aging regeneration and oncogenesis, he was focusing on both pro- and anti-mitotic mechanisms: recent research now suggests that there is a nonpathologic, "healthy" form of regeneration that is actually antagonistic to oncogenesis, and that melatonin may be important in this form of regeneration. This paper explores Pierpaoli's pioneering studies in light of recent developments in stem cell and regenerative biology, particularly as related to the regenerative potential associated with certain cognitive-behavioral practices, and includes evidence on this subject presented for the first time.

Jan 10, 2006

VR experiment suggests relationship between trait social anxiety and startle reactivity

Anticipation of Public Speaking in Virtual Reality Reveals a Relationship Between Trait Social Anxiety and Startle Reactivity
Cornwell BR, Johnson L, Berardi L, Grillon C.
Biol Psychiatry. 2005 Nov 30
Abstract. BACKGROUND: Startle reflex modification has become valuable to the study of fear and anxiety, but few studies have explored startle reactivity in socially threatening situations. METHODS: Healthy participants ranging in trait social anxiety entered virtual reality (VR) that simulates standing center-stage in front of an audience to anticipate giving a speech and count backward. We measured startle and autonomic reactivity during anticipation of both tasks inside VR after a single baseline recording outside VR. RESULTS: Trait social anxiety, but not general trait anxiety, was positively correlated with startle before entering VR and most clearly during speech anticipation inside VR. Speech anticipation inside VR also elicited stronger physiologic responses relative to anticipation of counting. CONCLUSIONS: Under social-evaluative threat, startle reactivity showed robust relationships with fear of negative evaluation, a central aspect of social anxiety and clinical social phobia. Context-specific startle modification may be an endophenotype for subtypes of pathological anxiety.

Jan 09, 2006

Connotea

Connotea is a free online reference management service for scientists. It allows storing reference list online, making them accessible from every pc, and sharing them with colleagues. Researchers with similar scientific interests can be discovered by connecting to the collections of those with similar interests

More about Connotea...

Interdisciplines

Interdisciplines is a website for research in the social sciences, merging contributions from different fields in the humanities. One interesting feature of this site is that it allows to organize virtual conferences. The current conference is on Causality

Past conferences include very interesting topics, as mirror neurons, art and cognition, language and evolution.



XPod: Emotion-aware mobile music player

Via Pasta and Vinegar

A paper by Andor Dornbush, Kevin Fisher, Kyle McKay, Alex Prikhodko, and Zary Segall describe a mobile MP3 player, the Xbox, which is able to automatically select the song best suited to the emotive situation of the user.

Here is an excerpt from the article (I am quoting it from Nicholas' blog Pasta and Vinegar).

the notion of collecting human emotion and activity information from the user, and explore how this information could be used to improve the user experience with mobile music players.
(…)
a mobile MP3 player, XPod, which is able to automate the process of selecting the song best suited to the emotion and the current activity of the user. The XPod concept is based on the idea of automating much of the interaction between the music player and its user.
(…)
After an initial training period, the XPod is able to use its internal algorithms to make an educated selection of the song that would best fit its user’s emotion and situation. We use the data gathered from a streaming version of the BodyMedia SenseWear to detect different levels of user activity and emotion. After determining the state of the user the neural network engine compares the user’s current state, time, and activity levels to past user song preferences matching the existing set of conditions and makes a musical selection. The XPod system was trained to play different music based on the user’s activity level. A simple pattern was used so the state dependant customization could be verified. XPod successfully learned the pattern of listening behavior exhibited by the test user. As the training proceeded the XPod learned the desired behavior and chose music to match the preferences of the test user. XPod automates the process of choosing music best suited for a user’s current activity. The success of the initial implementation of XPod concepts provides the basis for further exploration of human- and emotion-aware mobile music players.