Directional tuning for eye and arm movements in overlapping regions in human posterior parietal cortex

Caterina Magri, Sara Fabbri, Alfonso Caramazza, Angelika Lingnau

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Abstract

A network of frontal and parietal regions is known to be recruited during the planning and execution of arm and eye movements. While movements of the two effectors are typically coupled with each other, it remains unresolved how information is shared between them. Here we aimed to identify regions containing neuronal populations that show directional tuning for both arm and eye movements. In two separate fMRI experiments, the same participants were scanned while performing a center-out arm or eye movement task. Using a whole-brain searchlight-based representational similarity analysis (RSA), we found that a bilateral region in the posterior superior parietal lobule represents both arm and eye movement direction, thus extending previous findings in monkeys.
Original languageEnglish
Pages (from-to)234-242
Number of pages9
JournalNeuroimage
Volume191
Early online date13-Feb-2019
DOIs
Publication statusPublished - 1-May-2019

Keywords

  • Directional tuning
  • Representational similarity analysis
  • arm movements
  • Saccades
  • posterior parietal cortex
  • SENSORIMOTOR TRANSFORMATIONS
  • EFFECTOR INFORMATION
  • COORDINATE SYSTEM
  • HAND ORIENTATION
  • NEURAL ACTIVITY
  • REPRESENTATIONS
  • SIGNALS
  • AREA
  • ORGANIZATION
  • INTEGRATION

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