case of non-causal time or first-order integrators (truncated exponential kernels) coupled in cascade in the case of truly time-causal operations, optionally in combination with local glissando transformations to account for variations in frequencies over time. The shapes of the receptive field functions in these models can be determined by necessity from structural properties of the environment combined with requirements about the internal structure of the auditory system to enable theoretically well-founded processing of sound signals at different temporal and log-spectral scales. Thereby, the receptive fields in inferior colliculus can be seen as well adapted to handling natural sound transformations. Additional images See also Auditory system List of regions in the human brain References External links NIF Search - Brachium of inferior colliculus via the Neuroscience Information Framework Auditory system Midbrain Tectum Corpora quadrigemina