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The human egomotion network.

Ria Maxine Ruehl1, Virginia L Flanagin2, Leoni Ophey3

  • 1Department of Neurology, University Hospital Munich, Ludwig-Maximilians-University Munich, Marchionini Str. 15, 81377 Munich, Germany; German Center for Vertigo and Balance Disorders, IFB-LMU, University Hospital Munich, Ludwig-Maximilians-University Munich, Marchionini Str. 15, 81377 Munich, Germany.

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Summary
This summary is machine-generated.

Researchers mapped the human brain's egomotion network using advanced neuroimaging. This network integrates visual and vestibular signals for self-motion perception, involving key areas in the cingulate sulcus, cerebellum, and temporo-parietal cortex.

Keywords:
CSvEgomotionFunctional ConnectivityHuman Area 7aNeuroimagingPcM/pCiUvulaVPS

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Area of Science:

  • Neuroscience
  • Human Brain Imaging
  • Sensorimotor Integration

Background:

  • Volitional movement in 3D space necessitates integrating visual and vestibular sensory information.
  • The precise neural mechanisms and brain regions involved in processing self-motion signals remain incompletely understood.

Purpose of the Study:

  • To delineate and characterize the complete cortical and subcortical egomotion network in the human brain.
  • To investigate the functional connectivity patterns within this network during self-motion perception.

Main Methods:

  • Utilized fast and precise whole-brain neuroimaging techniques.
  • Applied both visual and vestibular stimulation to induce self-motion perception in a cohort of 131 participants.

Main Results:

  • Identified a core egomotion network including the cingulate sulcus (CSv, PcM/pCi), cerebellar uvula, and temporo-parietal cortex (VPS, supramarginal gyrus).
  • Proposed an unnamed supramarginal gyrus region as the human homologue of macaque area 7a.
  • Highlighted the crucial role of cingulate sulcus-cerebellar uvula connections in egomotion perception, potentially via feedback loops.
  • Observed unique functional connectivity in PcM/pCi, suggesting a role in multisensory integration for self-referential spatial awareness.

Conclusions:

  • The identified egomotion network is critical for integrating multisensory information for self-motion perception.
  • Connections between the cingulate sulcus and cerebellum are vital for updating visuo-spatial and vestibular information.
  • The PcM/pCi region plays a central role in multisensory integration and self-referential spatial awareness.
  • Egomotion hubs exhibit modular functional connectivity, supporting general sensorimotor integration with visual, vestibular, and somatosensory areas.