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Flexible Reference Frames for Grasp Planning in Human Parietofrontal Cortex

Frank T M Leoné1, Simona Monaco2, Denise Y P Henriques2

  • 1Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen , 6525 HR, Nijmegen, The Netherlands.

Eneuro
|October 15, 2015
PubMed
Summary
This summary is machine-generated.

Brain regions involved in grasping use different spatial reference frames. The anterior intraparietal sulcus (aIPS) dynamically shifts between gaze- and body-centered frames based on sensory input for grasping actions.

Keywords:
functional magnetic resonance imaginggraspingmultivariateparietofrontal cortexreference framestransformations

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Human Brain Imaging

Background:

  • Spatial navigation and action planning rely on cortical networks processing information in various reference frames.
  • Neuronal populations dynamically shift between egocentric (body-centered) and allocentric (gaze-centered) reference frames, influenced by task demands and sensory input.
  • Grasping movements integrate multiple target properties beyond spatial location, necessitating flexible reference frame computations.

Purpose of the Study:

  • To investigate how visual and somatosensory information about grasping targets is encoded in gaze- and body-centered reference frames within specific brain circuits.
  • To determine if reference frames are differentially recruited based on sensory modality and gaze direction during grasping.
  • To identify brain regions exhibiting common coding across sensory modalities for grasping actions.

Main Methods:

  • Human functional magnetic resonance imaging (fMRI) study examining non-manipulative grasping movements.
  • Targets were presented visually or somatosensorially, with gaze direction manipulated.
  • A novel multivariate classification and cross-classification approach was used to analyze reference frame encoding.

Main Results:

  • The left anterior intraparietal sulcus (aIPS) demonstrated modality-dependent coding: gaze-centered for visual targets and body-centered for somatosensory targets.
  • The left superior parieto-occipital cortex consistently encoded grasping targets in a gaze-centered reference frame.
  • The left anterior precuneus and premotor areas showed modality-independent, body-centered coding.

Conclusions:

  • The left anterior intraparietal sulcus (aIPS) plays a crucial role in integrating sensory information and transitioning between different spatial reference frames during grasping.
  • Specific cortical areas exhibit distinct reference frame strategies, with some being modality-dependent (aIPS) and others modality-independent (superior parieto-occipital cortex, anterior precuneus, premotor areas).
  • Findings elucidate the neural mechanisms underlying the flexible use of spatial reference frames in sensorimotor control for complex actions like grasping.