Motor representations involved in perceiving tools and graspable non-tools: an fMRI study

Autor: J. Hunter Downs, Traci H. Downs, Dennis R. Proffitt, Gregory Harrington, Sarah H. Creem
Rok vydání: 2000
Předmět:
Zdroj: NeuroImage. 11:S883
ISSN: 1053-8119
DOI: 10.1016/s1053-8119(00)91811-1
Popis: •fMRI Acquisition »1.5 T Siemens Vision scanner »Gradient-echo EPI sequence »26 contiguous axial slices 4 mm thick with in-plane resolution of 2.6 x 2.6 mm »Whole brain acquisition »Maximum of 128 acquisitions •Activation Localization »Pearson’s correlation with Bonferroni correction (AFNI) »Registered to anatomical MRI and spatially normalized to Talairach atlas (AFNI) »ANOVA to compare Tools and Non-Tools •Task »Covertly name objects »Look at blurred images •Paradigm »Alternated epochs of Tools, Non-tools (NT) and Blurred Images (Control) »8 Pictures presented in each epoch (400 ms) followed by crosshair (1600 ms) Discussion Do we perceive objects relative to their potential for actions? A number of recent studies have found that observation and naming of common tools activates premotor areas in the absence of any motoric task (Chao & Martin, 2000; Grafton et al., 1997; Martin et al., 1996). Activity in this area has not been found in similar tasks involving other types of objects. A question exists as to whether premotor activity is associated with a tool’s semantic properties relating to action, or whether this activity is associated with automatic motor representations elicited by any objects that afford actions.
Databáze: OpenAIRE
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