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Deliagina Laboratory

Professor

Tatiana Deliagina

Telefon: 08-524 869 15
Enhet: Institutionen för neurovetenskap (Neuro), C4
E-post: Tatiana.Deliagina@ki.se

More information about Deliagina Lab

Research focus

The general goal of our research is to under­stand the organization and operation of neuronal networks responsible for maintenance of basic body posture, as well as their damage caused by spinal cord injury (SCI). To reveal common basic principles in operation of postural networks, we use experimental models of different complexity: lower vertebrates (lampreys), and mammals (rabbits and cats).

We have developed a number of methods and techniques specifically aimed at the study of postural networks (techniques which allow studying the orientation-dependent activity of individual neurons in in vitro and in decerebrate preparations; recording the activity of identified neurons in animals performing postural tasks; a method of “reversible spinalization”; etc.)

Our specific aims are:

  1. To characterize formation and functional role of supraspinal commands for postural corrections and their impairment by SCI.
  2. To analyze operation of spinal postural networks, and their impairment caused by SCI.
  3. To characterize the potential of spinal postural networks for plastic changes contributing to restoration of postural functions in chronic SCI subjects, and to test methods for induction of such changes.

These studies are necessary for understanding the origin of motor deficits caused by interruption of spinal pathways. They will help to focus various therapies to restoration of a basic motor function–postural control, and to provide suggestions for rehabilitation of SCI-patients.

Effect of spinalization on population activity of spinal neurons. A,B. The mean firing frequency of the same population of neurons in intact spinal cord (A) and after spinalization (B). C-F. Effect of spinalization of activity of two populations of spinal neurons (F-neurons and E-neurons) contributing to generation of postural corrections. The mean firing frequency of populations of F- and E-neurons in intact (C,E) and spinal (D,F) subjects, respectively.

Selected publications

25370349

24741060

24285903

22446009

23197735

Group members

Grigori Orlovsky - Affiliated professor emeritus, researcher

Pavel Zelenin - Associate professor

Vladimir Lyalka - Laboratory engineer

Li-Ju Hsu - Postdoc

Manideep Gupta Vemula - PhD student