Topic: tracer injections

Information about an animal's surroundings reaches the brain through multiple sensory modalities. Multimodal information is integrated at multiple stages, including subcortically, and in primary-sensory and higher-order cortical areas. A basic and functionally important feature of multisensory convergence is its topography. For example, in the superior colliculus, visual, auditory, and tactile information converge in register, producing a two-dimensional map that drives saccades. Many studies have demonstrated multimodal convergence elsewhere in the brain, but beyond the superior colliculus, t