Auditory Cortex Lesion and Sound Lateralization: Interaural Time Difference Versus the Interaural Intensity Difference


Sound localization in the horizontal plane primarily depends on the interaural time difference (ITD) and interaural intensity difference (HD). Single-unit techniques have shown that binaural neurons in the auditory cortex of cats (6, 7) are sensitive to the ITD or IID. If identical sounds with the ITD or IID are presented to both ears through earphones, the sound images are lateralized to the side receiving the earlier, or louder, stimulus within the head. The perceptual effects are therefore termed sound lateralization rather than sound localization. In free-field, these two cues are combined with spectral cues provided by the outer ears to characterize the origin of a sound source.


Auditory Cortex Sound Localization Interaural Time Difference Bilateral Lesion Auditory Threshold 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Sanchez-Longo LP, Forster FM (1957) Clinical significance of impairment of sound localization. Neurology 8:119–125Google Scholar
  2. 2.
    Klingon GH, Bontecou DC (1966) Localization in auditory space. Neurology 16:879–886Google Scholar
  3. 3.
    Shankweiler DP (1961) Performance of brain-damaged patients on two tests of sound localization. J Comp Physiol Psychol 54:375–381CrossRefGoogle Scholar
  4. 4.
    Jerger J, Weikers NJ, Sharbrough FW III, Jerger S (1969) Bilateral lesions of the temporal lobe: a case study. Acta Otolaryngol (Stockh) 258:S1–S51Google Scholar
  5. 5.
    Jerger J, Lovering L, Wertz M (1972) Auditory disorder following bilateral temporal lobe insult: report of a case. J Speech Hear Dis 37:523–535Google Scholar
  6. 6.
    Hall JL, Goldstein MH Jr (1968) Representation of binaural stimuli by single units in primary auditory cortex of unanesthetized cats. J Acoust Soc Am 43:456–461PubMedCrossRefGoogle Scholar
  7. 7.
    Kitzes LM, Wrege KS, Cassady JM (1980) Patterns of responses of cortical cells to binaural stimulation. J Comp Neurol 192:455–472PubMedCrossRefGoogle Scholar
  8. 8.
    Walsh EG (1958) An investigation of sound localization in patients with neurological abnormalities. Brain 80:222–250CrossRefGoogle Scholar
  9. 9.
    Bisiach E, Cornacchia L, Sterzi R (1984) Disorders of perceived auditory lateralization after lesions of the right hemisphere. Brain 107:37–52PubMedCrossRefGoogle Scholar
  10. 10.
    Yamada K, Kaga K (1991) A study on ITD and IID of patients with ABR wave abnormalities due to brainstem damage. Audiol Jpn 34:238–243Google Scholar

Copyright information

© Springer, Tokyo 2009

Personalised recommendations