作者: Israel Nelken , Amit Yaron , Ana Polterovich , Itai Hershenhoren
DOI: 10.1007/978-1-4614-1590-9_45
关键词: Sensory system 、 Stimulus (physiology) 、 Neuroscience 、 Mismatch negativity 、 Auditory cortex 、 Medial geniculate body 、 Rare events 、 Inferior colliculus 、 Biology 、 Auditory system
摘要: Detecting rare and surprising events is a useful strategy for sensory systems. In the human auditory system, deviance detection indexed by an important component of event-related potentials, mismatch negativity (MMN). Responses single neurons in inferior colliculus, medial geniculate body, cortex mammals (cats, rats, mice) show responses that share some properties with MMN: they are evoked events, preattentive (in as much occur anesthetized animals), and, at least level primary cortex, cannot be accounted simple fatigue incoming information. Here we extend these results to deviations beyond tone frequency. Recording rat using oddball sequences consisting two frozen tokens broadband noise samples, found differences between same token when used common deviant, showing exquisite sensitivity small spectro-temporally similar sounds. Similarly, differential adaptation can demonstrated word-like stimuli have been derived from speech but adapted system. Thus, sounds present also whose complexity mirrors natural environments.