Joshua I. Gold, PhD

faculty photo
Professor of Neuroscience
Department: Neuroscience
Graduate Group Affiliations

Contact information
116 Johnson Pavilion
3610 Hamilton Walk
University of Pennsylvania School of Medicine
Philadelphia, PA 19104-6060
Office: (215) 746-0028
Fax: (215) 573-9050
Education:
Sc.B. (Neural Sciences)
Brown University , 1991.
Ph.D. (Neurosciences)
Stanford University, 1997.
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Description of Research Expertise

Many aspects of higher brain function rely on two closely related capacities, inference and learning. Inference is the process of drawing conclusions from uncertain data, like forming a percept from noisy sensory information or predicting the most rewarding future outcome from the recent history of outcomes. These inferences often inform decisions that determine behavior. Learning uses experience to shape how these kinds of inference and decision processes function, often optimizing them to meet particular goals. Recent work has begun to identify how and where in the brain inference processes are implemented, particularly in the service of perceptual and reward-based decision-making. Research in my laboratory focuses on how these processes are shaped by learning to provide the flexibility a decision-maker needs to survive in a complex and dynamic world.

We use several complementary approaches to study this complex issue.

1) Quantitative measures of behavior (“psychophysics”) combined with non-invasive measures of physiological variables like pupil diameter in human subjects. These studies allow us to prototype new behavioral tasks, identify and quantify interesting behaviors, and begin to make inferences about and understand the underlying neural mechanisms.

2) Psychophysics and electrophysiology in non-human primates. These studies allow us to test directly ideas about the relationship between neural activity in a particular brain region or regions and behavior.

3) Computational modeling. These studies help to define optimal limits on behavior, characterize relationships between behavioral and neural data, and identify particular computations that can drive complex behaviors.

The goal of our work is to provide new insights into the neural mechanisms that govern complex, learned behaviors and ultimately translate these insights into new approaches to understand, diagnose, and treat disorders of learning and cognition.

Selected Publications

Connolly PM and Gold JI: The effects of training on the representation of a perceptual decision in developing oculomotor commands. Soc for Neuro Abs(621.69), 2005.

Kalwani RM, Bloy L, Hulvershorn J, Elliott MA and Gold JI: A novel method for localizing electrode trajectories in the macaque brain using MRI. Soc for Neuro Abs(454.14), 2005.

Law C and Gold JI: Physiological correlates of perceptual learning in monkey areas MT and LIP. Soc for Neuro Abs(621.15), 2005.

Gold JI, Mazurek MR and Roitman JD: Sequential fluctuations in choice and reaction time for a direction-discrimination task. CoSyNe 2004.

Gold JI and Shadlen MN : The influence of behavioral context on the representation of a perceptual decision in developing oculomotor commands. J Neurosci 23: 632–651, 2003.

Gold JI: Linking reward expectation to behavior in the basal ganglia. Trends in Neuro 26: 12–13, 2003.

Gold JI and Shadlen, MN : Banburismus and the brain: decoding the relationship between sensory stimuli, decisions, and reward. Neuron 36: 299–308, 2002.

Gold JI and Mazurek ME: Posterior parietal cortex: not just where, but how. Nat Neurosci 5: 506–8, 2002.

Gold JI: Good vibrations. Neuron 33(6): 842-844, 2002.

Gold JI and Knudsen EI: Auditory experience-induced adjustment of neural connectivity in the barn owl’s inferior colliculus revealed by focal pharmacological inactivation J Neurophysiol 85(4): 1575–1584, 2001.

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Last updated: 11/10/2014
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