Tonotopic organization of the human auditory cortex.
Neuromagnetic measurements of responses to auditory stimuli consisting of pure tones amplitude-modulated at a low frequency have been used to deduce the location of cortical activity. The evoked field source systematically increased in depth beneath the scalp with increasing frequency of the tone. The tonotopic progression can be described as a logarithmic mapping.
D000161:Acoustic Stimulation; D001303:Auditory Cortex / Q000033:anatomy & histology / Q000502:physiology*; D005071:Evoked Potentials; D005072:Evoked Potentials, Auditory; D006801:Humans; D008280:Magnetics