Figure 1.

Potential sources of non-auditory inputs to the IC. Solid lines indicate probable primary sources of visual, somatosensory, or behaviorally relevant signals; these regions are known to process the corresponding type of information (e.g., the retina is involved in processing visual signals) and have direct connections to the IC. Faded lines represent sparse anatomical connections. Dashed lines are regions that, based on circumstantial evidence, may carry somatosensory or eye position signals to the IC. Somatosensory cortex, SC, and nDC may mediate more than one type of input and are listed under multiple headings; their connections are shown only once (indicated by parenthesis color). See Table 1 for abbreviations.