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  • Eye movements evoked by simultaneous stimulation of two sites in superior colliculus
    Internal Dataset

    Authors
    • Katnani, Husam
    • Gandhi, Neeraj
    Description

    The authors measured eye movements evoked by electrical stimulation delivered simultaneously to two sites in the superior colliculus of nonhuman primates. The effects of current frequency and intensity on movement trajectories are available. The data are potentially useful for understanding algorithms for decoding movement commands from population activity in the superior colliculus.

    Keywords
    • Electric Stimulation
    • Eye Movement Measurements
    • Macaca mulatta
    • Microstimulation
    • Superior Colliculi
    • Vector averaging
    • Vector summation
    Access Rights
    Author approval required
  • Data from: The expression of established cognitive brain states stabilizes with working memory development
    Internal Dataset

    Authors
    • Montez, David Florentino
    • Calabro, Finnegan
    • Luna, Beatriz
    Description

    This data package includes fMRI raw data, anonymized eye movement data, subject information, and fMRI task timing information, along with README files, for a ten-year longitudinal study of the adolescent development of working memory.

    From the abstract: The authors present results from a longitudinal study conducted over 10 years in a sample of 126 8- to 33-year-olds demonstrating that adolescent development of working memory is supported by decreased variability in the amplitude of expression of whole brain states of task-related activity. fMRI analyses reveal that putative gain signals affecting maintenance and retrieval aspects of working memory processing stabilize during adolescence, while those affecting sensorimotor processes do not. The authors show that trial-to-trial variability in the reaction time and accuracy of eye-movements during a memory guided saccade task are related to fluctuations in the amplitude of expression of task-related brain states, or brain state variability, and also provide evidence that individual developmental trajectories of reaction time variability are related to individual trajectories of brain state variability. These observations demonstrate that underlying the maturation of cognition through adolescence is the stabilization of widespread gain signals affecting already available cognitive processes.

    Keywords
    • Adolescent Development
    • Child Development
    • Cognitive Neuroscience
    • Eye Movement Measurements
    • Magnetic Resonance Imaging
    • Memory, Short-Term
    • Task Performance and Analysis
    Access Rights
    Free to all
  • Data from: Maturational Changes in Anterior Cingulate and Frontoparietal Recruitment Support the Development of Error Processing and Inhibitory Control (Antistate)
    Internal Dataset

    Authors
    • Velanova, Katerina
    • Wheeler, Mark E.
    • Luna, Beatriz
    Description

    This data package contains 3401 individual data files for 73 human subjects (28 adults aged 18-27, 35 adolescents aged 13-17, and 35 children aged 8-12) during correct and incorrect performance of an oculomotor task requiring inhibitory control.

    From the abstract: Documenting the development of the functional anatomy underlying error processing is critically important for understanding age-related improvements in cognitive performance. Here we used functional magnetic resonance imaging to examine time courses of brain activity in 77 individuals aged 8–27 years during correct and incorrect performance of an oculomotor task requiring inhibitory control. Canonical eye-movement regions showed increased activity for correct versus error trials but no differences between children, adolescents and young adults, suggesting that core task processes are in place early in development. Anterior cingulate cortex (ACC) was a central focus. In rostral ACC all age groups showed significant deactivation during correct but not error trials, consistent with the proposal that such deactivation reflects suspension of a “default mode” necessary for effective controlled performance. In contrast, dorsal ACC showed increased and extended modulation for error versus correct trials in adults, which, in children and adolescents, was significantly attenuated. Further, younger age groups showed reduced activity in posterior attentional regions, relying instead on increased recruitment of regions within prefrontal cortex. This work suggests that functional changes in dorsal ACC associated with error regulation and error-feedback utilization, coupled with changes in the recruitment of “long-range” attentional networks, underlie age-related improvements in performance.

    Keywords
    • Adolescent Development
    • Brain Mapping
    • Child Development
    • Cognitive Neuroscience
    • Eye Movement Measurements
    • Gyrus Cinguli
    • Magnetic Resonance Imaging
    • Task Performance and Analysis
    Access Rights
    Free to all