Institut für Psychologie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany.
Exp Brain Res. 2011 Sep;213(2-3):299-308. doi: 10.1007/s00221-011-2715-y. Epub 2011 May 15.
Although it is known that sounds can affect visual perception, the neural correlates for crossmodal interactions are still disputed. Previous tracer studies in non-human primates revealed direct anatomical connections between auditory and visual brain areas. We examined the structural connectivity of the auditory cortex in normal humans by diffusion-weighted tensor magnetic resonance imaging and probabilistic tractography. Tracts were seeded in Heschl's region or the planum temporale. Fibres crossed hemispheres at the posterior corpus callosum. Ipsilateral fibres seeded in Heschl's region projected to the superior temporal sulcus, the supramarginal gyrus and intraparietal sulcus and the occipital cortex including the calcarine sulcus. Fibres seeded in the planum temporale terminated primarily in the superior temporal sulcus, the supramarginal gyrus, the central sulcus and adjacent regions. Our findings suggest the existence of direct white matter connections between auditory and visual cortex--in addition to subcortical, temporal and parietal connections.
虽然人们知道声音会影响视觉感知，但跨模态相互作用的神经关联仍存在争议。先前在非人类灵长类动物中的示踪研究显示了听觉和视觉脑区之间的直接解剖连接。我们通过弥散张量磁共振成像和概率追踪研究检查了正常人类听觉皮层的结构连接。在 Heschl 区或颞平面中播种轨迹。纤维在后胼胝体处穿过半球。在 Heschl 区播种的同侧纤维投射到颞上沟、缘上回和顶内沟以及包括距状沟在内的枕叶皮层。在颞平面中播种的纤维主要终止于颞上沟、缘上回、中央沟和相邻区域。我们的发现表明，除了皮质下、颞叶和顶叶连接外，听觉和视觉皮层之间还存在直接的白质连接。
