Visual Processing Laboratory

Justin Ales

Research Interests:

My research has been focused on recovering the activity in early visual cortical areas using EEG/MEG. The problem is that the areas are physically close together, making it tough to unambiguously localize the sources of activity. We've progressed with developing ways to improve signal to noise in order to record EEG responses to many small stimuli. We've been attempting to use these stimuli to create a retinotopic map comparable to fMRI, but with better temporal resolution.

 

Education:

2002 - BS in Biomedical/Electrical Engineering, University of Southern California
2002 - 2007 PhD, Vision Science, UC Berkeley, Berkeley, CA

 

Presentations and Talks:

• SFN 2006
  Combining multifocal VEP and fMRI to seperate activity from retinotopic visual cortex
  J. Ales, S. Dandekar, T. Carney, S. Klein
  
• SFN 2006
  Timing of the "attentional blink": evidence for temporal crowding
  A. Popple, S. Klein, J. Ales, D. Levi
  
• Vss 2006
  Using multifocal VEPs to extract retinotopic sources of activity
  J. Ales, S. Dandekar, T. Carney, S. Klein
  
• Vss 2006
  Inter-subject Variability of the Visual Evoked Potential
  S. Dandekar, J. Ales, T. Carney, S. Klein
  
• VSS 2006
  Extending the multi-focal VEP method to complex stimuli
  T. Carney, J. Ales, S. Klein
  
• SFN 2005
  Advances in multifocal evoked potential (VEP) methods
  T. Carney, J. Ales, T. Duong, S. Klein
  
• SFN 2005
  Retinotopic activation of early visual areas using multifocal VEPs
  J. Ales, T. Carney, S. Klein
  
• VSS 2005
  Multifocal VEP Signal Dependence on Stimulus Area
  J. Ales, T. Carney, S. Klein
  Poster PDF 865 KB
• VSS 2005
  Cortical Folding as a Sparseness Criterion for Identifying VEP Sources
  S. Dandekar, J. Ales, T. Carney, S. Klein
  Poster PDF 1.57 MB
• SFN 2004
  Miltifocal VEP Signal Dependence on Stimulus Area
  J. Ales, T. Carney, T. Duong, S. Klein
  PDF (no movies) 1.6M | Zipped PPT 11.6 MB
• Human Brain Mapping Conference 2003
  Solving The Rotation Problem for Closely Spaced VEP Sources
  Y. Tian, S. Dastmalchi, S. Klein, T. Carney, J. Ales
  PDF 260KB
  

 

Email: ales@berkeley.edu