Hocking Julia, Price Cathy J
Centre for Magnetic Resonance, The University of Queensland, Brisbane, Australia.
Brain Res. 2008 Nov 19;1241(1):92-102. doi: 10.1016/j.brainres.2008.08.037. Epub 2008 Aug 26.
This paper investigates how neuronal activation for naming photographs of objects is influenced by the addition of appropriate colour or sound. Behaviourally, both colour and sound are known to facilitate object recognition from visual form. However, previous functional imaging studies have shown inconsistent effects. For example, the addition of appropriate colour has been shown to reduce antero-medial temporal activation whereas the addition of sound has been shown to increase posterior superior temporal activation. Here we compared the effect of adding colour or sound cues in the same experiment. We found that the addition of either the appropriate colour or sound increased activation for naming photographs of objects in bilateral occipital regions and the right anterior fusiform. Moreover, the addition of colour reduced left antero-medial temporal activation but this effect was not observed for the addition of object sound. We propose that activation in bilateral occipital and right fusiform areas precedes the integration of visual form with either its colour or associated sound. In contrast, left antero-medial temporal activation is reduced because object recognition is facilitated after colour and form have been integrated.
本文研究了为物体照片命名时的神经元激活是如何受到添加适当颜色或声音的影响的。在行为层面，已知颜色和声音都有助于从视觉形式中识别物体。然而，先前的功能成像研究显示出不一致的结果。例如，添加适当颜色已被证明会减少前内侧颞叶的激活，而添加声音则被证明会增加后颞上回的激活。在此，我们在同一实验中比较了添加颜色或声音线索的效果。我们发现，添加适当的颜色或声音都会增加双侧枕叶区域和右侧前梭状回中为物体照片命名时的激活。此外，添加颜色会减少左侧前内侧颞叶的激活，但添加物体声音时未观察到这种效果。我们提出，双侧枕叶和右侧梭状回区域的激活先于视觉形式与其颜色或相关声音的整合。相比之下，左侧前内侧颞叶的激活减少是因为在颜色和形式整合后物体识别变得更容易了。
