August 2023
Volume 23, Issue 9
Open Access
Vision Sciences Society Annual Meeting Abstract  |   August 2023
Abstract representations of grasping action parameters in the dorsal stream
Author Affiliations
  • Naama Zur
    Georgetown University
  • Yuqi Liu
    Georgetown University
    Institute of Neuroscience, Key Laboratory of Primate Neurobiology, CAS Center for Excellence in Brain Sciences and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China;
  • Sriparna Sen
    Georgetown University
  • Nanak Nihal Khalsa
    Georgetown University
  • Jody Culham
    Department of Psychology, University of Western Ontario, London, Ontario, N6A 5C2, Canada;
    Brain and Mind at Western, Western Interdisciplinary Research Building, University of Western Ontario, London, Ontario, N6A 3K7, Canada
  • Ella Striem-Amit
    Georgetown University
Journal of Vision August 2023, Vol.23, 5937. doi:
  • Views
  • Share
  • Tools
    • Alerts
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Naama Zur, Yuqi Liu, Sriparna Sen, Nanak Nihal Khalsa, Jody Culham, Ella Striem-Amit; Abstract representations of grasping action parameters in the dorsal stream. Journal of Vision 2023;23(9):5937.

      Download citation file:

      © ARVO (1962-2015); The Authors (2016-present)

  • Supplements

The dorsal visual stream supports reaching and grasping with one’s hands. However, it remains unclear how the dorsal stream supports comparable actions if the action is not performed manually. Specifically, here we tested if the dorsal stream encodes the size of an object involved in the action, regardless of what body part interacts with it. To address this, in the current fMRI study we examined activation during grasping performed by two different body parts – the right hand and the right foot, while varying the size of the grasped object. To determine whether there is a shared representation for grasping size for both foot and hand, we conducted a multivariate pattern analysis to decode patterns across effectors, and trained the classifier to decode size for the hand and tested on the foot and vice versa. The results indicate that decoding grasping size was possible across the hand and the foot, in the Inferior parietal lobe (IPL) within the dorsal visual stream, as well as in motor cortices such as M1 and the ventral premotor cortex (PMv). These findings suggest that the dorsal stream action representations are independent from specific motor parameters such as the body part performing the action.


This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.