Research Occupations

Topics

• Vision

  • Visuospatial processing

  • Visual Awareness

  • Bistable vision (ambiguous stimuli)

  • Frontoparietal influences on conscious vision

  • TMS masking

• Consciousness, and whatever it may be

• Effects of Transcranial Magnetic Stimulation (TMS) on the brain

• Binocular vision/rivalry

Methods

• fMRI

  • Connectivity (Granger Causality Mapping)

• EEG

• TMS

• Multimodal (all combinations)

Article Publications (click title for PDF)

de Graaf TA, Hsieh, P.J., Sack AT. (in press) The 'Correlates' in neural correlates of consciousness. Neurosci Biobehav Rev.

de Graaf TA, Cornelsen S, Jacobs C, Sack AT. (2011) TMS effects on subjective and objective measures of vision: Stimulation intensity and pre- versus post-stimulus masking. Conscious Cogn. 2011 May 30. [Epub ahead of print]

de Graaf TA, de Jong MC, Goebel R, van Ee R, Sack AT. (2011) On the Functional Relevance of Frontal Cortex for Passive and Voluntarily Controlled Bistable Vision. Cereb Cortex. Mar 8. [Epub ahead of print]

de Graaf TA, Herring J, Sack AT. (2011) A chronometric exploration of high-resolution 'sensitive TMS masking' effects on subjective and objective measures of vision. Exp Brain Res. Mar;209(1):19-27.

de Graaf TA, Sack AT. (2011) Null results in TMS: from absence of evidence to evidence of absence. Neurosci Biobehav Rev. Jan;35(3):871-7

Machado S, Araújo F, Paes F, Velasques B, Cunha M, Budde H, Basile LF, Anghinah R, Arias-Carrión O, Cagy M, Piedade R, de Graaf TA, Sack AT, Ribeiro P. (2010) EEG-based brain-computer interfaces: an overview of basic concepts and clinical applications in neurorehabilitation. Rev Neurosci. 21(6):451-68

de Graaf, T. A., Jacobs, C., Roebroeck, A., & Sack, A. T. (2009). FMRI effective connectivity and TMS chronometry: complementary accounts of causality in the visuospatial judgment network. PLoS One, 4(12), e8307.

de Graaf, T. A., Roebroeck, A., Goebel, R., & Sack, A. T. (2010). Brain Network Dynamics Underlying Visuospatial Judgment: An fMRI Connectivity Study. Journal of Cognitive Neuroscience, 22(9).