A major open - and very important question in cognitive neuroscience is: how and where are decisions made? Based on experimental work using a motion discrimination task, it is thought that perceptual decisions evolve within visuomotor regions of the brain controlling the generation of action. Where in the brain are decisions based on form computed? Are the principles gleaned from studying motion decisions applicable to form-based decisions? How do memories (mediated by the medial temporal lobe system) interact with perceptions to guide choices? We address these questions in four aims.
In Aim 1, we will determine performance accuracy and sensitivity of subjects in novel perceptual decision-making tasks that rely on form information. We will test the hypothesis that subjects show evidence of a decision-to-bound process in the performance of a form-based, perceptual decision-making task.
In Aim 2, we will determine the role of V4 extrastriate cortex in the perception of Glass patterns and in a novel perceptual decision-making task that relies on form discrimination. We will determine the relationship between neuronal activity in extrastriate cortical area V4 and behavioral performance in a form-based perceptual task in the same way that MT neuronal activity was characterized for motion perception. By building on our previous work, in Aim 3, we will determine the role of the superior colliculus in form-based perceptual decision-making and in Aim 4, we will determine whether the basal ganglia play a role in conveying memory information to motor circuits to guide form-based decisions under conditions of sensory uncertainty. The results of our experiments will shed new light on decision-making processing in visual areas of the brain and may provide a framework for understanding enigmatic symptoms seen in a number of neurological and neuropsychiatric diseases involving the basal ganglia.

Public Health Relevance

These experiments will determine how midlevel visual areas contribute to form-based decisions and how circuits in downstream areas relay memory information to guide action choices when sensory information is ambiguous. The results may shed light on important problems in visual cognitive neuroscience.

National Institute of Health (NIH)
National Eye Institute (NEI)
Research Project (R01)
Project #
Application #
Study Section
Special Emphasis Panel (ZRG1)
Program Officer
Flanders, Martha C
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
University of California Los Angeles
Schools of Medicine
Los Angeles
United States
Zip Code
Perugini, Alessandra; Ditterich, Jochen; Shaikh, Aasef G et al. (2018) Paradoxical Decision-Making: A Framework for Understanding Cognition in Parkinson's Disease. Trends Neurosci 41:512-525
Grimaldi, Piercesare; Hah Cho, Seong; Lau, Hakwan et al. (2018) Superior Colliculus Signals Decisions Rather Than Confidence: Analysis of Single Neurons. J Neurophysiol :
Crapse, Trinity B; Lau, Hakwan; Basso, Michele A (2018) A Role for the Superior Colliculus in Decision Criteria. Neuron 97:181-194.e6
Basso, Michele A; May, Paul J (2017) Circuits for Action and Cognition: A View from the Superior Colliculus. Annu Rev Vis Sci 3:197-226
Perugini, Alessandra; Ditterich, Jochen; Basso, Michele A (2016) Patients with Parkinson's Disease Show Impaired Use of Priors in Conditions of Sensory Uncertainty. Curr Biol 26:1902-10
Basso, Michele A (2016) Monkey neurophysiology to clinical neuroscience and back again. Proc Natl Acad Sci U S A 113:6591-3
Grimaldi, Piercesare; Lau, Hakwan; Basso, Michele A (2015) There are things that we know that we know, and there are things that we do not know we do not know: Confidence in decision-making. Neurosci Biobehav Rev 55:88-97
Crapse, Trinity B; Basso, Michele A (2015) Insights into decision making using choice probability. J Neurophysiol 114:3039-49
Mahamed, Safraaz; Garrison, Tiffany J; Shires, Joel et al. (2014) Stimulation of the substantia nigra influences the specification of memory-guided saccades. J Neurophysiol 111:804-16
Powers, Alice S; Basso, Michele A; Evinger, Craig (2013) Blinks slow memory-guided saccades. J Neurophysiol 109:734-41

Showing the most recent 10 out of 21 publications