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1,153 Newest Publications in proceedings of the national academy of sciences current issue

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Spectrum of power laws for curved hand movements [Neuroscience]

21-Jul-2015 | Dongsung Huh; Terrence J. Sejnowski, Proceedings of the National Academy of Sciences current issue, 2015

In a planar free-hand drawing of an ellipse, the speed of movement is proportional to the −1/3 power of the local curvature, which is widely thought to hold for general curved shapes. We investigated this phenomenon for general curved hand movements by analyzing an optimal control model that ...

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Behavioral consequences of selective damage to frontal pole and posterior cingulate cortices [Neuroscience]

21-Jul-2015 | Farshad A. Mansouri; Mark J. Buckley; Majid Mahboubi; Keiji Tanaka, Proceedings of the National Academy of Sciences current issue, 2015

Frontal pole cortex (FPC) and posterior cingulate cortex (PCC) have close neuroanatomical connections, and imaging studies have shown coactivation or codeactivation of these brain regions during performance of certain tasks. However, they are among the least well-understood regions of the primate ...

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Insular neural system controls decision-making in healthy and methamphetamine-treated rats [Neuroscience]

21-Jul-2015 | Hiroyuki Mizoguchi; Kentaro Katahira; Ayumu Inutsuka; Kazuya Fukumoto; Akihiro Nakamura; Tian Wang; Taku Nagai; Jun ..., Proceedings of the National Academy of Sciences current issue, 2015

Patients suffering from neuropsychiatric disorders such as substance-related and addictive disorders exhibit altered decision-making patterns, which may be associated with their behavioral abnormalities. However, the neuronal mechanisms underlying such impairments are largely unknown. Using a ...

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Distinct roles for GABA across multiple timescales in mammalian circadian timekeeping [Neuroscience]

21-Jul-2015 | Daniel DeWoskin; Jihwan Myung; Mino D. C. Belle; Hugh D. Piggins; Toru Takumi; Daniel B. Forger, Proceedings of the National Academy of Sciences current issue, 2015

The suprachiasmatic nuclei (SCN), the central circadian pacemakers in mammals, comprise a multiscale neuronal system that times daily events. We use recent advances in graphics processing unit computing to generate a multiscale model for the SCN that resolves cellular electrical activity down to ...

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GABA-mediated repulsive coupling between circadian clock neurons in the SCN encodes seasonal time [Neuroscience]

21-Jul-2015 | Jihwan Myung; Sungho Hong; Daniel DeWoskin; Erik De Schutter; Daniel B. Forger; Toru Takumi, Proceedings of the National Academy of Sciences current issue, 2015

The mammalian suprachiasmatic nucleus (SCN) forms not only the master circadian clock but also a seasonal clock. This neural network of ∼10,000 circadian oscillators encodes season-dependent day-length changes through a largely unknown mechanism. We show that region-intrinsic changes in the SCN ...

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Neural activity and CaMKII protect mitochondria from fragmentation in aging Caenorhabditis elegans neurons [Neuroscience]

14-Jul-2015 | Hao-Ching Jiang; Jiun-Min Hsu; Chien-Ping Yen; Chi-Chao Chao; Ruey-Hwa Chen; Chun-Liang Pan, Proceedings of the National Academy of Sciences current issue, 2015

Decline in mitochondrial morphology and function is a hallmark of neuronal aging. Here we report that progressive mitochondrial fragmentation is a common manifestation of aging Caenorhabditis elegans neurons and body wall muscles. We show that sensory-evoked activity was essential for maintaining ...

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Triangulation of the neurocomputational architecture underpinning reading aloud [Neuroscience]

14-Jul-2015 | Paul Hoffman; Matthew A. Lambon Ralph; Anna M. Woollams, Proceedings of the National Academy of Sciences current issue, 2015

The goal of cognitive neuroscience is to integrate cognitive models with knowledge about underlying neural machinery. This significant challenge was explored in relation to word reading, where sophisticated computational-cognitive models exist but have made limited contact with neural data. Using ...

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Correction to Supporting Information for Talantova et al., A{beta} induces astrocytic glutamate release, extrasynaptic NMDA receptor activation, and synaptic loss [SI Correction]

14-Jul-2015 | Proceedings of the National Academy of Sciences current issue, 2015

NEUROSCIENCE Correction to Supporting Information for “Aβ induces astrocytic glutamate release, extrasynaptic NMDA receptor activation, and synaptic loss,” by Maria Talantova, Sara Sanz-Blasco, Xiaofei Zhang, Peng Xia, Mohd Waseem Akhtar, Shu-ichi Okamoto, Gustavo Dziewczapolski, Tomohiro ...

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Tracking ongoing cognition in individuals using brief, whole-brain functional connectivity patterns [Neuroscience]

14-Jul-2015 | Javier Gonzalez-Castillo; Colin W. Hoy; Daniel A. Handwerker; Meghan E. Robinson; Laura C. Buchanan; Ziad S. Saad; P ..., Proceedings of the National Academy of Sciences current issue, 2015

Functional connectivity (FC) patterns in functional MRI exhibit dynamic behavior on the scale of seconds, with rich spatiotemporal structure and limited sets of whole-brain, quasi-stable FC configurations (FC states) recurring across time and subjects. Based on previous evidence linking various ...

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Enhanced memory consolidation in mice lacking the circadian modulators Sharp1 and -2 caused by elevated Igf2 signaling in the cortex [Neuroscience]

07-Jul-2015 | Ali Shahmoradi; Konstantin Radyushkin; Moritz J. Rossner, Proceedings of the National Academy of Sciences current issue, 2015

The bHLH transcription factors SHARP1 and SHARP2 are partially redundant modulators of the circadian system. SHARP1/DEC2 has been shown to control sleep length in humans and sleep architecture is also altered in double mutant mice (S1/2−/−). Because of the importance of sleep for memory ...

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