Andres Posada

 Institut des Sciences Cognitives
 67, boulevard Pinel
 69675 Bron cedex France
 Tel: 33-4-37911220
 Fax: 33-4-37911210
 E-mail: posada@isc.cnrs.fr

Team:Psychopathology of intentional processes
 
     

            
                      
 

 




 

Profile

Andres Posada received his PhD from the University of Lausanne (Switzerland) in 1998. He is actually developping a postdoctoral stage at the Institute for Cognitive Science, he is actually financed by a Swiss National Fondation Fellowship.

During his PhD, he carried out studies of molecular mechanisms underlying  neuronal death during the developement of nervous system. He also realized  a computational model to understand the role of this neuronal death in the assembly of the neural networks. Actually he is working on the cognitive process underlying the use of abstract rules and its deficit in patients with schizophrenia. He use different experimental approachs including behavioral tasks, EEG recordings (Evoked Potentials and Oscillations) and Transcranial Magnetic Stimulation. His main field of interest is to understand how, in humans, abstract rule can almost instantaneously modify sensorimotor associations and how this cognitive control process operates in brain.


Publications


Kilner J, Bott L and Posada A. Dynamic oscillatory activity in the human brain mediates event prediction. Journal Neuroscience (In review)

Sirigu A, Daprati E, Ciancia S, Giraux P, Nighoghossian N, Posada A Haggard P. Altered awareness of voluntary action following damage to the parietal cortex. Nature Neuroscience (In Press).

Posada A, Zalla T, Vianin P, Georgieff N and Franck N. Abnormal frontal brain activation in schizophrenia during a rule operation task. Psychiatry Research (In Press).

Posada A, Hugues E, Vianin P, Franck N and Kilner J. Augmentation of induced visual gamma activity by increased task complexity. European Journal of Neuroscience 18:1-6.

Posada A, Vianin P, Giard MH and Franck N. (2003) Stimulus and response ERP analyses of a two level reaction time task. Experimental. Brain Research 152: 79-86.

Noveck I and Posada A (2003). Investigating the time course of implicature. Brain and Language 85(2):203-10.

Jeannerod M, Farrer C, Franck N, Fourneret P, Posada A, Daprati E and Georgieff N. Action recognition in normal and schizophrenic subjects. In: Self and Schizophrenia, T. Kircher and A.S. David (Eds), Cambridge University Press, London, 2003.

Posada A, Georgieff N and Franck N (2002). Psicopatología cognitiva de la acción en la esquizofrenia. Innovacion y Ciencia X: 10-12.

Vianin P, Posada A, Hugues E, Franck N, Bovet P, Parnas J, Jeannerod M (2002). Reduced P300 amplitude in a visual recognition task in patients with schizophrenia. Neuroimage 17(2):911-21.

Posada A and Franck N. (2002). Use of a rule in schizophrenia. Psychiatry Research 109: 289-296.

Zalla T, Posada A, Franck N, Georgieff N and, Sirigu A (2001) A component analysis of action planning processes in schizophrenia: A comparison with patients with frontal lobe damage. Cognitive Neuropsychiatry 6: 271-296.

Posada A, Franck N, Georgieff N and Jeannerod M (2001) Anticipating an incoming event. An impaired cognitive process  in  schizophrenia. Cognition 81:, 209-225.

Castagné V, Gautschi M, Lefèvre K, Posada A and Clarke PGH (1999) Relationships between neuronal death and the cellular redox status. Focus on the developing nervous system. Progress in Neurobiology 59 (4): 397-423.

Posada A (1999) La muerte neuronal. Innovacion y Ciencia VIII: 52 – 56.

Posada A and Clarke PGH (1999) The role of neuronal death during the development of topographically ordered projections: a computational approach. Biological Cybernetics 81 (3): 239-247.

Posada A and Clarke PGH (1999) Rôle of nitric oxide in a fast retrograde neuronal death signal during development. Developmental Brain Research 114: 37 - 42.

Posada A and Clarke PGH (1999) Fast retrograde effects on neuronal death and dendritic organization in development: the role of calcium influx. Neuroscience 89: 399-408.

Clarke PGH, Posada A, Primi MP and Castagné V (1998) Neuronal death in the central nervous system. Biomed & Pharmacother 52: 356 – 62.
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Institute for Cognitive Science  UPR CNRS 9075 67, boulevard Pinel 69675 BRON cedex
33 (0)4 37 91 12 12    33 (0)4 37 91 12 10  web@isc.cnrs.fr

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