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Jason M. Samonds
Research Associate,
Carnegie Mellon University


Phone: (412) 268-3922
Fax: (412) 268-5060

Individual Website:

Ph.D., Vanderbilt University

Research Interests

Visual perception is an interactive process involving prediction, identification, classification, and decision or reaction.  My interest is in understanding how the visual cortex takes local information about discontinuities (e.g., edges) and forms a global percept.  Specifically, how does the cortex integrate distributed signals in order to identify correlations among those discontinuities?  The problem is compounded by the fact that objects are typically embedded within an environment that also contains structure and correlation.  We use knowledge from natural scene statistics, psychophysical data, and computer vision algorithms to formulate hypotheses, and we employ rigorous statistical analyses on simultaneous recordings from multiple neurons distributed across the cortical network.  Our results provide us with clues on how the brain is able to segment and identify objects, as well as reveal properties of the underlying cortical mechanisms.

Recent Publications

  • Samonds J.M. & Bonds A.B. (2005) Gamma oscillations maintain stimulus structure-dependent synchronization in cat visual cortex. J. Neurophysiol. 93:223-236.
  • Samonds J.M. & Bonds A.B. (2004) Real-time visualization of neural synchrony for identifying coordinated cell assemblies. J. Neurosci. Methods. 139:51-60.
  • Samonds J.M., Allison J.D., Brown H.A. & Bonds A.B. (2004) Cooperative synchronized assemblies enhance orientation discrimination. Proc. Natl. Acad. Sci. USA. 101:6722-6727.
  • Samonds J.M. & Bonds A.B. (2004) From another angle: Differences in cortical coding between fine and coarse discrimination of orientation. J. Neurophysiol. 91:1193-1202.
  • Samonds J.M., Allison J.D., Brown H.A. & Bonds A.B. (2003) Cooperation between area 17 neuron pairs enhances fine discrimination of orientation. J. Neurosci. 23:2416-2425.