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Séminaire impromptu : Bastien Berret

vendredi 8 février 2019 / 11:00 - 12:00

Moving at a self-selected pace: vigor, inter-individual differences and the cost of time theory

Lieu : salle de réunion de l’INCIA

Bastien Berret
(Université Paris-Sud, http://hebergement.u-psud.fr/berret/ )

Invitant : Aymar de Rugy
INCIA

Abstract: In daily life we often move at a self-selected pace, thereby choosing certain relationships between amplitude, speed or duration, i.e. movement vigor. Yet, the principles underlying the formation of movement vigor remain unclear. If basal ganglia dysfunction clearly affects movement vigor, as exemplified by bradykinesia in Parkinson’s patients, relatively large inter-individual differences have also been reported among healthy participants performing various motor tasks such as saccades, walking or reaching. Biomechanics (e.g. anthropometry) likely contributes to inter-individual differences but recently a “cost of time” theory has been proposed to be the cornerstone of such differences in movement invigoration. It assumes that the brain puts a cost on time during the neural control of movement. In this talk, I will review earlier theories that have been proposed to account for the vigor of human movement and motivate the cost of time theory as a normative means to predict the vigor of self-paced arm movements. The proposed theory can account for the formation of movement vigor as well as for inter-individual differences beyond simple biomechanical discrepancies. The consistency of the cost of time across modeling choices, tasks or repeated measurements will then be explored, and future works will be discussed. Overall, the formation of vigor is a central (yet still intriguing) aspect of human motor behavior that seems to require a multidisciplinary approach lying at the interface of mathematics, biomechanics, neurophysiology and psychology, to be better understood.

Prochainement

  1. Séminaire – Suzana Herculano-Houzel

    vendredi 26 avril 2019 / 11:30

    Life slows down with more neurons in the cerebral cortex

  2. XIIIth IBAGS Meeting

    dimanche 28 avril 2019 - jeudi 2 mai 2019

    The XIIIth edition of the IBAGS meeting will be held in Biarritz from the 28th of April to the 2nd of May. In this meeting, we gather outstanding scientists and clinicians from all over the world to discuss about topics related to basal ganglia pathways, physiology, reinforcement learning and related disorders. Tutorials on basic science and clinical aspects of the basal ganglia will be given on the introducing day of the meeting. http://www.ibags2019.com/

  3. Séminaire impromptu – Maxime Assous

    vendredi 3 mai 2019 / 10:00 - 11:30

    Extrinsic innervation of striatal interneurons and implications for the local microcircuitry.

  4. Conférence mensuelle – Richard Robitaille

    vendredi 3 mai 2019 / 11:30 - 12:30

    Regulation of synaptic structure ad function by glial cells in health and disease

  5. Séminaire – Stéphanie Trouche

    vendredi 10 mai 2019 / 11:30 - 12:30

    Invitant : Catherine Le Moine

Détails

Date :
vendredi 8 février 2019
Heure :
11:00 - 12:00
Catégorie d’Évènement: