234 research outputs found

    Psychomotor Impairment Detection via Finger Interactions with a Computer Keyboard During Natural Typing

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    Modern digital devices and appliances are capable of monitoring the timing of button presses, or finger interactions in general, with a sub-millisecond accuracy. However, the massive amount of high resolution temporal information that these devices could collect is currently being discarded. Multiple studies have shown that the act of pressing a button triggers well defined brain areas which are known to be affected by motor-compromised conditions. In this study, we demonstrate that the daily interaction with a computer keyboard can be employed as means to observe and potentially quantify psychomotor impairment. We induced a psychomotor impairment via a sleep inertia paradigm in 14 healthy subjects, which is detected by our classifier with an Area Under the ROC Curve (AUC) of 0.93/0.91. The detection relies on novel features derived from key-hold times acquired on standard computer keyboards during an uncontrolled typing task. These features correlate with the progression to psychomotor impairment (p < 0.001) regardless of the content and language of the text typed, and perform consistently with different keyboards. The ability to acquire longitudinal measurements of subtle motor changes from a digital device without altering its functionality may allow for early screening and follow-up of motor-compromised neurodegenerative conditions, psychological disorders or intoxication at a negligible cost in the general population.Comunidad de Madri

    Virtually Instantaneous, Room-Temperature [11C]-Cyanation Using Biaryl Phosphine Pd(0) Complexes

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    A new radiosynthetic protocol for the preparation of [[superscript 11]C]aryl nitriles has been developed. This process is based on the direct reaction of in situ prepared L¡Pd(Ar)X complexes (L = biaryl phosphine) with [[superscript 11]C]HCN. The strategy is operationally simple, exhibits a remarkably wide substrate scope with short reaction times, and demonstrates superior reactivity compared to previously reported systems. With this procedure, a variety of [[superscript 11]C]nitrile-containing pharmaceuticals were prepared with high radiochemical efficiency.National Institutes of Health (U.S.) (NIH GM46059)National Science Foundation (U.S.) (NSF predoctoral fellowship (2010094243))Amgen Inc. (Educational donation)National Institutes of Health (U.S.) (NIH-NIDA postdoctoral fellowship (2T32DA015036)

    Application of Palladium-Mediated 18F-Fluorination to PET Radiotracer Development: Overcoming Hurdles to Translation

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    New chemistry methods for the synthesis of radiolabeled small molecules have the potential to impact clinical positron emission tomography (PET) imaging, if they can be successfully translated. However, progression of modern reactions from the stage of synthetic chemistry development to the preparation of radiotracer doses ready for use in human PET imaging is challenging and rare. Here we describe the process of and the successful translation of a modern palladium-mediated fluorination reaction to non-human primate (NHP) baboon PET imaging–an important milestone on the path to human PET imaging. The method, which transforms [18F]fluoride into an electrophilic fluorination reagent, provides access to aryl–18F bonds that would be challenging to synthesize via conventional radiochemistry methods.Chemistry and Chemical Biolog
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