title: Do temporal processes underlie left hemisphere dominance in speech perception?
abstract: It is not unusual to find it stated as a fact that the left hemisphere is specialized for the processing of rapid, or temporal aspects of sound, and that the dominance of the left hemisphere in the perception of speech can be a consequence of this specialization. In this review we explore the history of this claim and assess the weight of this assumption. We will demonstrate that instead of a supposed sensitivity of the left temporal lobe for the acoustic properties of speech, it is the right temporal lobe which shows a marked preference for certain properties of sounds, for example longer durations, or variations in pitch. We finish by outlining some alternative factors that contribute to the left lateralization of speech perception.
authors.affiliation: Institute for Cognitive Neuroscience, 17 Queen Square, London WC1N 3AR, UK. Electronic address: sophie.scott@ucl.ac.uk.
authors.forename: Sophie K
authors.initials: SK
authors.lastname: Scott
authors.forename: Carolyn
authors.initials: C
authors.lastname: McGettigan
mesh_terms: D000161:Acoustic Stimulation; D001303:Auditory Cortex / Q000502:physiology*; D001931:Brain Mapping; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D010898:Pitch Perception / Q000502:physiology; D013060:Speech / Q000502:physiology; D013067:Speech Perception / Q000502:physiology*
keywords: Auditory processing; Functional neuroimaging; Hemispheric asymmetries; Speech perception