Amplitude modulation transfer functions reveal opposing populations within both the inferior colliculus and medial geniculate body
D. O. Kim, Laurel H. Carney, Shigeyuki Kuwada
Abstract
Opposing populations of neurons have been identified in the mammalian auditory midbrain and thalamus. In response to amplitude-modulated sounds, responses of one population (band-enhanced) increased whereas responses of another (band-suppressed) decreased relative to their responses to an unmodulated sound. These opposing auditory populations are analogous to the ON and OFF populations of the visual system and may improve transfer of information carried by the temporal envelopes of complex sounds such as speech.
Topics & Concepts
Inferior colliculusNeuroscienceMedial geniculate bodySuperior colliculusModulation (music)Geniculate bodyGeniculateBiologyCommunicationPsychologyPhysicsVisual cortexNucleusAcousticsHearing Loss and RehabilitationHearing, Cochlea, Tinnitus, GeneticsSpeech and Audio Processing