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Unraveling the circuits of locomotion with opto-genetic manipulation of neuronal activity in awake behaving animals

Objective

Locomotion relies on neural networks called central pattern generators (CPGs) that generate periodic motor commands for rhythmic movements. The manipulation of electrical activity and cell signaling in specific neuron type using light gated receptors enables us today to dissect the specific neuronal circuits forming the CPGs, and understand the dynamic role of sensory inputs in awake behaving animals.
During my work in UC Berkeley, I developed the use of light gated receptors in vivo (Szobota 2007, Pautot 2008 and Wyart 2009). This novel approach enables us to test directly the role of specific pattern of activity in genetically identified neurons for shaping the complex locomotor behaviors.
Using a combination of targeted gene expression and optical tools for monitoring and manipulating neuronal activity (“optogenetics”) in awake behaving animals, we have revealed the role of mysterious cells present at the interface between the spinal cord and the central canal: the cerebrospinal fluid (CSF) contacting neurons. I demonstrated that during early development in low vertebrates these cells provide the positive drive to the spinal central pattern generators for spontaneous locomotion (Wyart et al 2009).
My future plan focuses on investigating further the circuits of locomotion in the healthy and severed spinal cord. My project consists in three distinct aims:
Aim 1. To examine the chemo- and mechano-sensory functions of spinal
CSF-contacting neurons
Aim 2. To elucidate the role of dynamic sensory feedback for triggering
transitions during locomotion
Aim 3. To improve recovery of function after spinal cord injury using
optogenetics

Field of science

  • /natural sciences/biological sciences/cell biology/cell signaling
  • /natural sciences/computer and information sciences/artificial intelligence/computational intelligence

Call for proposal

FP7-PEOPLE-2010-RG
See other projects for this call

Funding Scheme

MC-IRG - International Re-integration Grants (IRG)

Coordinator

INSTITUT DU CERVEAU ET DE LA MOELLE EPINIERE
Address
Boulevard De L'hopital 47
75013 Paris
France
Activity type
Research Organisations
EU contribution
€ 100 000
Administrative Contact
Iwona Jablonska (Ms.)