Michael ANDRES




Michael ANDRES

Department of Experimental Psychology
Faculty of Psychology
Ghent University
Henri Dunantlaan 2
9000 Gent
Tel : +32 9 264 64 03



 Research Interests :

   My master degree was in Neuropsychology at the Université catholique de Louvain (UCL, Belgium). I did my last year dissertation with Xavier Seron and Aliette Lochy on the switching between Arabic and verbal notations during the writing of numbers. I started a doctoral degree with Xavier Seron on the study of hemispheric lateralization of number representation and the influence of finger counting on number representation in adults. My method of choice was transcranial magnetic stimulation (TMS), a technique that I learned with Etienne Olivier in the Laboratory of Neurophysiology (UCL) and with Tomas Paus during a stay at the Montreal Neurological Institute (McGill University, Canada). Using TMS, I confirmed the dominant role of the left parietal cortex in exact number comparison and evidenced increased corticospinal excitability (CSE) in hand motor circuits during serial processing of numbers and letters, suggesting a link between the representation of fingers and ordered series.

   I also participated to the investigation of the neural representation of simple motor acts, such as grasping, and complex actions like tool use (with Etienne Olivier and Marco Davare). Using electromyographic recordings and kinematic measurements, I collected evidence that number magnitude can interfere with grip aperture, in line with the idea that the representation of numerical and physical magnitudes share common processes (with Arnaud Badets and Samuel Di Luca). I pursued this idea in a number of collaborative projects using functional magnetic resonance imaging (fMRI) and TMS to investigate the functional overlap between number, time and space representations in the parietal cortex (with Mauro Pesenti and Valérie Dormal).

   During my post-doc, I used dual tasks, fMRI and CSE measurements to specificy the role of motor representations in mental arithmetic (with Mauro Pesenti and Nicolas Michaux) and action verb understanding (with Manuela Piazza). I looked at motor imagery and action understanding in a person with a congenital absence of upper limbs (with Agnesa Pillon and Gilles Vannuscorps) and worked as a fellow researcher at the CIMeC (University of Trento, Italy) where I tried to combine habituation paradigms with fMRI in order to reveal the tuning properties of parietal and frontal regions in response to number or finger change (with Manuela Piazza).

   More recently, I contributed to the development of a TMS lab at Ghent University (Department of Experimental Psychology, UGent, Belgium) and iniated several projects with Wim Fias and Marcel Brass where we investigate cognitive control processes in stop signal and switching tasks. My goal is to extend current knowledge of control processes to complex cognitive tasks, such as mental arithmetic, with a great interest for the role of the prefrontal cortex as an interface between stimulus-response association in the parietal cortex and response execution in the motor cortex.

Publications :


•    Pourtois, G., Sander, D., Andres, M., Grandjean, D., Reveret, L., Olivier, E., & Vuilleumier, P. (2004). Dissociable roles of the human somatosensory and superior temporal cortices for processing social face signals. European Journal of Neuroscience, 20, 3507-3515.

•    Andres, M., Davare, M., Pesenti, M., Olivier, E., & Seron, X. & (2004). Number magnitude and grip aperture interaction. NeuroReport, 15 (18), 2773-2777.  


•    Andres M., Seron X., & Olivier E. (2005). Hemispheric lateralization of number comparison. Cognitive Brain Research, 25, 283-290.

•    Pelgrims, B., Andres, M., & Olivier, E. (2005). Motor imagery while judging object-hand interactions. Neuroreport, 16, 1993-1996. 


•    Davare, M., Andres, M., Cosnard, G., Thonnard, J-L., & Olivier, E. (2006). Dissociating the role of ventral and dorsal premotor cortex in precision grasping. Journal of Neuroscience, 26(8), 2260-2268. 


•    Andres M., Seron X., & Olivier E. (2007). Contribution of hand motor circuits to counting. Journal of Cognitive Neuroscience, 19(4), 563-576. 

•    Badets, A., Andres, M., Di Luca, S., & Pesenti, M. (2007). Number magnitude potentiates action judgements. Experimental Brain Research, 180 (3), 525-534. 

•    Davare, M., Andres, M., Clerget, E., Thonnard, J-L., & Olivier, E. (2007). Temporal dissociation between hand shaping and grip force scaling in the anterior intraparietal area. Journal of Neuroscience, 27(15), 3974-3980. 


•    Andres, M., Olivier, E., & Badets, A. (2008). Actions, words and numbers:  A motor contribution to semantic processing? Current Directions in Psychological Science, 17, 313-317.

•    Andres, M., Ostry, D., Nicols, F., & Paus, T. (2008). Time course of number magnitude interference during grasping. Cortex, 44, 414-419. 

•    Olivier, E., Davare, M., Andres, M., & Fadiga, L. (2008). Control of precision grasping in humans. Current Opinion in Neurobiology, 17, 644-648.

•    Dormal, V., Andres M., & Pesenti, M. (2008). Dissociation of numerosity and duration processing in the left intraparietal sulcus: A transcranial magnetic stimulation study. Cortex, 44 (4), 462-469. 

•    Andres, M., Di Luca, S., & Pesenti, M. (2008). Finger counting: The missing tool? Behavioral and Brain Sciences, 31, 642-643.


•    Andres, M., & Pesenti, M. (2009). Common mistakes about numerical representations. Behavioral and Brain Sciences, 32, 346.

•    Pelgrims, B., Andres, M., & Olivier, E. (2009). Double dissociation between motor and visual imagery in the posterior parietal cortex. Cerebral Cortex, 19, 2298-2307.

•    Pesenti, M., & Andres, M. (2009). Common mistakes about numerical representations. Commentary on Cohen-Kadosch R. and Walsh V., Behavioral and Brain Sciences, 32, 346-347.


•    Michaux, N., Pesenti, M., Badets, A., Di Luca, S., & Andres, M. (2010). Let us redeploy attention to sensorimotor experience‏. Behavioral and Brain Sciences, 33(4), 283-284.

•    Dormal, V., Andres, M., Dormal, G., & Pesenti, M. (2010). Mode-dependent and mode-independent representations of numerosity in the right intraparietal sulcus. NeuroImage, 52, 1677-1686.  


•    Pelgrims, B., Michaux, N., Olivier, E., & Andres, M. (2011). Dissociation between manipulation and conceptual knowledge of object use in the supramarginal gyrus. Human Brain Mapping, 32(11), 1802-1810. 

•    Pelgrims, B., Olivier, E., & Andres, M. (2011). Contribution of the primary motor cortex to motor imagery : A sub-threshold TMS study. Human Brain Mapping, 32(9), 1471-1482.

•    Andres, M., Pelgrims, B., Michaux, N., Olivier, E., & Pesenti, M. (2011). Role of distinct parietal areas in arithmetic: An fMRI-guided TMS study. NeuroImage, 54(4), 3048-3056.  


•   Dormal, V., Andres, M., & Pesenti, M. (2012). Contribution of the right intraparietal sulcus to numerosity and length processing: an fMRI-guided TMS study. Cortex, 48(5), 623-629. 

•   Andres, M., Michaux, N., & Pesenti, M. (2012). Common substrate for mental arithmetic and finger representation in the parietal cortex. NeuroImage. in press.

Epub ahead of print retrieved June 28, 2012, from http://www.sciencedirect.com/science/article/pii/S1053811912005356