Responses of cat primary auditory cortex neurons to moving stimuli with dynamically changing interaural delays

被引：0

作者：

Nikitin N.I. ^{[1
]}

Varfolomeev A.L. ^{[1
]}

Kotelenko L.M. ^{[1
]}

机构：

[1] Auditory Physiology Group, I.P. Pavlov Institute of Physiology, Russian Academy of Sciences, 199034 St. Petersburg

来源：

Neuroscience and Behavioral Physiology | 2004年 / 34卷 / 9期

关键词：

Cat; Dichotic stimulation; Interaural delay; Localization of stationary and moving sound sources; Primary auditory cortex;

D O I：

10.1023/B:NEAB.0000042654.09989.85

中图分类号：

学科分类号：

摘要：

The spike responses of individual neurons in the primary auditory cortex were studied in anesthetized cats during exposure to stationary and moving stimuli with static or dynamically changing interaural delays (ΔT). Static stimuli were tones and clicks. Dynamic stimuli were created using series of synphase and antiphase clicks with interaural delays which changed over time. Sensitivity to changes in ΔT was predominantly present in neurons with low characteristic frequencies (less than 2.8 kHz). Changes in ΔT in moving stimuli induced responses in neurons sensitive to changes in ΔT in the stationary stimulus. The effect of movement could be a relationship between the level of spike activity and the direction and rate of change of ΔT or it could be a displacement of the tuning curve for the response to ΔT (the ΔT function) in the direction opposite to that of the direction of the change in ΔT. The magnitude of the effects of movement depended on the position of the period for changes in ΔT relative to the ΔT function. The greatest effects were seen with changes in ΔT on the sloping part of the ΔT function. © 2004 Springer Science-Business Media, Inc.

引用

页码：949 / 959

页数：10

共 47 条

[1]

Al'tman Ya.A., Sound Source Localization, (1972)

[2]

Al'tman Ya.A., Localization of Moving Sound Sources, (1983)

[3]

Al'tman Ya.A., Nikitin N.I., Inhibitory processes and the responses of cat auditory cortex neurons in dichotic stimulation, Zh. Évolyuts Biokhim. Fiziol., 21, 5, pp. 369-463, (1985)

[4]

Ahissar M., Ahissar E., Bergman H., Vaadia E., Encoding of sound-source location and movement: Activity of single neurons and interactions between adjacent neurons in the monkey auditory cortex, J. Neurophysiol., 67, pp. 203-215, (1992)

[5]

Altman J.A., Kalmykova I., Role of the dog's auditory cortex in discrimination of sound signals simulating sound source movement, Hear. Res., 24, 3, pp. 243-253, (1986)

[6]

Altman J.A., Varyagina O.V., Nikitin N.I., Radionova E.A., Lateralization of a moving auditory image: Interrelation of interaural time and intensity differences, J. Acous. Soc. Amer., 105, 1, pp. 366-376, (1999)

[7]

Baumgart F., Gaschler-Markefski B., Woldorff M.G., Henize H.J., Scheich H., A movement-sensitive area in auditory cortex, Nature, 400, pp. 724-726, (1999)

[8]

Brugge J.F., Reale R.A., Hind J.E., Auditory cortex and spatial hearing, Binaural and Spatial Hearing in Real and Virtual Environments, pp. 447-473, (1997)

[9]

Bashara K.O., Weeks R.A., Ishii K., Catalan M.J., Tian B., Rauschecker J.P., Hallet M., Modality-specific frontal and parietal areas for auditory and visual spatial localization in humans, Nat. Neurosci., 2, pp. 759-766, (1999)

[10]

Clarey J.C., Barone P., Imig T.J., Physiology of thalamus and cortex, The Mammalian Auditory Pathway. Neurophysiology, pp. 232-334, (1992)

← 1 2 3 4 5 →