Abigail E Hehmeyer

Microsoft, Вашингтон, West Virginia, United States

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Publications (2)3.23 Total impact

  • J.C. Tang · H. Chen · A. Chin · A. Hehmeyer · J. Suciu · J. Palmer · E. Shtiegman ·
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    ABSTRACT: Sharing awareness information to help remote people establish real-time communication has been a research area for the past couple decades. Much of the work so far has focused on sharing awareness for communication availability in the work setting. Yet several recent trends suggest the need to reconsider the contexts and assumptions around awareness research. Increasing deployment of communication technology in homes and the blurring of home and work boundaries means that more communication interactions involve the home. The popularity of mobile smartphones adds the mobile context and the sensor capabilities integrated into mobile devices. Given the broadened scope of where and how communication occurs and the importance of being able to smoothly negotiate starting and ending conversations, there is an opportunity to reconsider awareness research in today's environment. We identify current challenges and opportunities in awareness research from perspectives beyond focusing just on the workplace to include technologies and use practices in the home and mobile contexts.
    Collaboration Technologies and Systems (CTS), 2013 International Conference on; 01/2013
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    ABSTRACT: Increased connectivity of high-order association regions in the neocortex has been proposed as a defining feature of human brain evolution. At present, however, there are limited comparative data to examine this claim fully. We tested the hypothesis that the distribution of neuropil across areas of the neocortex of humans differs from that of one of our closest living relatives, the common chimpanzee. The neuropil provides a proxy measure of total connectivity within a local region because it is composed mostly of dendrites, axons, and synapses. Using image analysis techniques, we quantified the neuropil fraction from both hemispheres in six cytoarchitectonically defined regions including frontopolar cortex (area 10), Broca's area (area 45), frontoinsular cortex (area FI), primary motor cortex (area 4), primary auditory cortex (area 41/42), and the planum temporale (area 22). Our results demonstrate that humans exhibit a unique distribution of neuropil in the neocortex compared to chimpanzees. In particular, the human frontopolar cortex and the frontoinsular cortex had a significantly higher neuropil fraction than the other areas. In chimpanzees these prefrontal regions did not display significantly more neuropil, but the primary auditory cortex had a lower neuropil fraction than other areas. Our results support the conclusion that enhanced connectivity in the prefrontal cortex accompanied the evolution of the human brain. These species differences in neuropil distribution may offer insight into the neural basis of human cognition, reflecting enhancement of the integrative capacity of the prefrontal cortex.
    The Journal of Comparative Neurology 09/2012; 520(13):2917-29. DOI:10.1002/cne.23074 · 3.23 Impact Factor

Publication Stats

21 Citations
3.23 Total Impact Points


  • 2013
    • Microsoft
      Вашингтон, West Virginia, United States
  • 2012
    • George Washington University
      • Department of Anthropology
      Washington, Washington, D.C., United States