Listeners:
Top listeners:
play_arrow
Paul Verschure on consciousness and distributed adaptive control CSN Podcasts
play_arrow
Edvard Moser on grid cells and entorhinal cortex CSN Podcasts
play_arrow
Giacomo Rizzolatti on mirror neurons and action understanding CSN Podcasts
play_arrow
Robert Axelrod on game theory and prisoner's dilemma CSN Podcasts
play_arrow
Adrian Owen on disorders of consciousness and vegetative state CSN Podcasts
play_arrow
Jonathan Whitlock on markerless motion capture and posterior parietal cortex CSN Podcasts
play_arrow
Luis Puelles on neuroanatomy and prosomeric model CSN Podcasts
play_arrow
Zoltan Molnar on subplate neurons and cortical development CSN Podcasts
Episode 7 15.03.2014
play_arrow
PLAY EPISODE
What if the motor cortex does not just encode movements but organizes entire behavioral repertoires, reaching, grasping, defending, across three interconnected cortical stages? Neuroanatomist Jon Kaas describes how long-duration electrical stimulation reveals a modular architecture for goal-directed action in primates that challenges standard views of motor control. Subscribe for more from the Convergent Science Network podcast series. Jon Kaas joins Paul Verschure and Tony Prescott at the BCBT summer school to present his research on the functional organization of the primate motor system, spanning prosimian galagos, New World monkeys, and macaques. Using half-second electrical stimulation pulses, Kaas and colleagues discovered that specific behavioral patterns , hand-to-mouth movements, defensive gestures, reaching, grasping , can be evoked from small, corresponding regions in posterior parietal cortex, premotor cortex, and primary motor cortex. These three stages form a hierarchical but parallel system where posterior parietal cortex integrates high-level sensory information, premotor cortex contributes executive and motivational inputs, and motor cortex provides the critical output. The discussion explores how this organization differs from the standard population-vector model of motor encoding and how it relates to subcortical control. Cooling experiments demonstrate that motor cortex is required for the other stages to produce movements, confirming a hierarchical dependency. Tracer injections reveal that corresponding behavioral zones across all three cortical stages converge on the same regions of the basal ganglia, suggesting a role for subcortical structures in learning and modulating these cortical action modules. Kaas argues that posterior parietal cortex expanded dramatically in primate evolution, adding cortical control over behaviors that were previously managed subcortically. Key topics include how long-duration stimulation reveals behavioral organization invisible to standard mapping, why posterior parietal cortex is a primate innovation with multimodal sensory inputs, how inhibitory connections between behavioral zones enable competition and action selection, what the scaling challenges are from galago to human motor repertoires, and whether the modular organization of stereotyped behaviors can accommodate the arbitrary, learned action sequences that characterize human performance. Part of the Convergent Science Network podcast series from the BCBT Summer School.
Tagged as:
Behavioral Cortical motor cortex Parietal Cortex Posterior Parietal posterior parietal cortex Reaching Grasping Stages
About the author call_made
Both the triumphs of humanity and its most evil deeds have resulted from collaboration. In a time where humanity is required to aspire to the former and minimize the latter, the question arises of how collaboration arises and why it fails. Surprisingly, this phenomenon, so central to who we are, is not well understood. Hence, a collaborative effort is required to understand collaboration in its full biological, psychological, sociological, cultural, and economic complexity and to translate this understanding into operational impact. This series of podcasts is one step toward achieving these complementary goals. The Collaboration Podcast presents interviews with people who are central orchestrators of collaboration in various domains including business, government, science, art, health, sustainability, and the military. The discussions were conducted by Prof. Dr. Paul F.M.J. Verschure and members of the Program Advisory Committee of the Ernst Strungmann Forum on Collaboration (https://www.esforum.de/forums/ESF32_Collaboration.html) during 2021 and had the goal to sketch a map of opportunities, challenges, and obstacles in human collaboration. The forum took place in May 2022, and now we would like to share this series of interviews with a broader audience. The full report of the Forum will be published in 2023 by MIT Press. The podcast was produced by the Convergent Science Network (https://www.convergentsciencenetwork.org/). Context: The stability of social systems depends critically on realizing sustainable methods of “collaboration,” yet how and by which means collaboration is achieved is not clearly understood; neither are the conditions or processes that lead to its breakdown or failure. Collaboration can be understood as cooperation between agents toward mutually constructed goals. Part of the reason for our lack of understanding is that the phenomenon of collaboration is, by nature, a highly multidisciplinary problem, and effective research into its complexities has been difficult to achieve across the broad range of scientific and technical disciplines involved. The need for a fundamental understanding of collaboration, however, has become increasingly important. Not only does humankind demand answers as it attempts to address critical challenges at multiple scales (e.g., climate change, migration, enhanced automation, social and economic inequality), but ever-increasing technological and economic means of interconnecting people and societies are disrupting long-established, familiar patterns of how we interact. Radical technological changes that are ongoing have the potential to reshape collaboration in ways that are currently hard to predict or influence (e.g., by altering configurations in interaction, information creation, and modes of communication). On one hand, such changes could disrupt hitherto stable forms of collaboration by affecting critical communication channels and traditional roles, as can be observed in the rapidly changing patterns in governance, commerce, and social interaction. Conversely, technology could lead to the emergence of novel, successful forms of collaboration that deviate from traditional “hierarchical” architectures. Evidence of this can be seen in areas as diverse as highly automated manufacturing plants, the open science movement, collaborative software repositories, user-centered services, and the sharing of economy-based modes of organization. Without a fundamental understanding of the mechanisms, processes, and boundary conditions of collaboration, it is not possible to evaluate or predict which of these possible scenarios are sustainable or even plausible. The Forum “How Collaboration Arises and Why it Fails” (May 8–13, 2022, Location: Frankfurt am Main, Germany) Chairs: Andreas Roepstorff and Paul Verschure Program Advisory Committee: Jenna Bednar, Julia R. Lupp, Bhavani R. Rao , Andreas Roepstorff, Ferdinand von Siemens, and Paul Verschure
Exploring the convergence of neuroscience, robotics, and AI through conversations with leading researchers since 2010.
A project of the Convergent Science Network Foundation.
© CSN Podcasts. Developed by IMCreative & WEBC
✖
✖
Are you sure you want to cancel your subscription? You will lose your Premium access and stored playlists.
✖
Be the first to leave a comment