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Controlling memory and resolving interference : prefrontal contributions to flexible behavior
(Massachusetts Institute of Technology, 2005)
Flow does the brain meet shifting task demands? The experiments and formal theoretical framework presented in this dissertation characterize the cognitive and neural processes by which flexible performance is enabled during ...
Multiple spatial memories in the brain : decoding and modification using microstimulation
(Massachusetts Institute of Technology, 2005)
Sequential processing --- using multiple sensory stimuli to plan and control a set of ordered movements --- is a central aspect of human behavior. Because previous and future movements must be stored during the execution ...
Learning a dictionary of shape-components in visual cortex : comparison with neurons, humans and machines
(Massachusetts Institute of Technology, 2006)
In this thesis, I describe a quantitative model that accounts for the circuits and computations of the feedforward path of the ventral stream of visual cortex. This model is consistent with a general theory of visual ...
Learnability, representation, and language : a Bayesian approach
(Massachusetts Institute of Technology, 2008)
Within the metaphor of the "mind as a computation device" that dominates cognitive science, understanding human cognition means understanding learnability not only what (and how) the brain learns, but also what data is ...
Hierarchical learning : theory with applications in speech and vision
(Massachusetts Institute of Technology, 2009)
Over the past two decades several hierarchical learning models have been developed and applied to a diverse range of practical tasks with much success. Little is known, however, as to why such models work as well as they ...
Replay of memories of extended behavior in the rat hippocampus
(Massachusetts Institute of Technology, 2009)
The hippocampus is a highly conserved structure in the medial temporal lobe of the brain that is known to be critical for spatial learning in rodents, and spatial and episodic memory in humans. During pauses in exploration, ...
Experience and perception
(Massachusetts Institute of Technology, 2007)
To what extent can experience shape perception? In what ways does perception vary across people or even within the same person at different times? This thesis presents three lines of research examining the role of experience ...
Seeking the neural basis of grammar : English noun and verb morphological processing investigated with rapid event-related fMRI and intracortical electrophysiology
(Massachusetts Institute of Technology, 2003)
(cont.) the functionality of the fMRI data analysis and visualization tools used at Massachusetts General Hospital. I analyze and interpret an 18-subject fMRI experiment I ran using the new task design and software tools. ...
Selective attention and the visual representation of object attributes in the ventrolateral prefrontal cortex and anterior cingulate cortex of the rhesus monkey
(Massachusetts Institute of Technology, 2005)
The effects of attending to one or another of an object's attributes on neuronal representations of that object were investigated using extracellular recordings. A female rhesus monkey performed a delayed match to object ...
Semantic and pragmatic language development in typical acquisition, autism spectrum disorders, and Williams syndrome with reference to developmental neurogenetics of the latter
(Massachusetts Institute of Technology, 2009)
The elucidation of the biological bases of a complex trait like human language proceeds from identification of precise behavioral phenotypes to investigation of the underlying genes. The human behavioral parts of this ...