title: Sustained fields of tones and glides reflect tonotopy of the auditory cortex.
abstract: Cortical activation in response to two types of auditory stimuli, constant-frequency tones and frequency glides, was studied by measuring the magnetic field outside the head using a whole-head 122-channel magnetometer. Both the magnetic N1m and sustained responses were located in the supratemporal plane of the primary auditory cortex. The sustained responses both to constant-frequency tones and frequency glides reflect tonotopic organization of the auditory cortex both in depth and direction, thus revealing the underlying neuroanatomical structure of the auditory cortex.
authors.affiliation: Department of Psychology, University of Helsinki, Finland.
authors.forename: M
authors.initials: M
authors.lastname: Huotilainen
authors.forename: H
authors.initials: H
authors.lastname: Tiitinen
authors.forename: J
authors.initials: J
authors.lastname: Lavikainen
authors.forename: R J
authors.initials: RJ
authors.lastname: Ilmoniemi
authors.forename: E
authors.initials: E
authors.lastname: Pekkonen
authors.forename: J
authors.initials: J
authors.lastname: Sinkkonen
authors.forename: P
authors.initials: P
authors.lastname: Laine
authors.forename: R
authors.initials: R
authors.lastname: Näätänen
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001303:Auditory Cortex / Q000502:physiology*; D004585:Electrooculography; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D015225:Magnetoencephalography; D008297:Male