Directional responses by kittens to an auditory stimulus

Clements, Maureen; Kelly, Jack B.

doi:10.1002/dev.420110514

Cited by 27 publications

(15 citation statements)

References 16 publications

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“…Behaviorally, adult cats localize sounds quickly and accurately with performance nearing that of humans ͑Moore et Tollin et al, 2005;Huang and May, 1996;Populin and Yin, 1998͒. And even kittens can approach sounds by around 24 days of age, although with much less precision ͑Clements and Kelly, 1978;Olmstead and Villablanca, 1980;Villablanca and Olmstead, 1979;Norton, 1974͒. The ability of kittens to make overt orienting responses to sounds suggests that the basic organization of the binaural system may be established early in development.…”

Section: E Implications For Physiological and Behavioral Developmentmentioning

confidence: 99%

Postnatal development of sound pressure transformations by the head and pinnae of the cat: Monaural characteristics

Tollin

Koka

2009

The Journal of the Acoustical Society of America

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Although there have been many anatomical, physiological, and psychophysical studies of auditory development in cat, there have been no comparable studies of the development of the sound pressured transformations by the cat head and pinnae. Because the physical dimensions of the head and pinnae determine the spectral and temporal transformations of sound, as head and pinnae size increase during development, the magnitude and frequency ranges of these transformations are hypothesized to systematically change. This hypothesis was tested by measuring directional transfer functions ͑DTFs͒, the directional components of head-related transfer functions, and the linear dimensions of the head and pinnae in cats from the onset of hearing ͑ϳ1.5 weeks͒ through adulthood. Head and pinnae dimensions increased by factors of ϳ2 and ϳ2.5, respectively, reaching adult values by ϳ23 and ϳ16 weeks, respectively. The development of the spectral notch cues to source location, the spatial-and frequency-dependent distributions of DTF amplitude gain ͑acoustic directionality͒, maximum gain, and the acoustic axis, and the resonance frequency and associated gain of the ear canal and concha were systematically related to the dimensions of the head and pinnae. These monaural acoustical properties of the head and pinnae in the cat are mature by 16 weeks.

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Section: E Implications For Physiological and Behavioral Developmentmentioning

confidence: 99%

Postnatal development of sound pressure transformations by the head and pinnae of the cat: Monaural characteristics

Tollin

Koka

2009

The Journal of the Acoustical Society of America

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“…Normal development of spectral tuning is greatly altered in infant kittens or rats exposed to tonal stimuli (Clements and Kelly, 1978;Zhang et al, 2001) and is grossly degraded when rats are reared through the CP in modulated or continuous noises (Bao et al, 2003a;Chang and Merzenich, 2003), and continuous noise exposure results in a prolongation of the CP duration. In humans, a history of chronic otitis media can affect the rate and quality of acquisition of normal language abilities (Moore et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

Critical Period Window for Spectral Tuning Defined in the Primary Auditory Cortex (A1) in the Rat

Villers-Sidani¹,

Chang²,

Bao³

et al. 2007

J. Neurosci.

339

346

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Experience-dependent plasticity during development results in the emergence of highly adapted representations of the external world in the adult brain. Previous studies have convincingly shown that the primary auditory cortex (A1) of the rat possesses a postnatal period of sensory input-driven plasticity but its precise timing (onset, duration, end) has not been defined. In the present study, we examined the effects of pure-tone exposure on the auditory cortex of developing rat pups at different postnatal ages with a high temporal resolution. We found that pure-tone exposure resulted in profound, persistent alterations in sound representations in A1 only if the exposure occurred during a brief period extending from postnatal day 11 (P11) to P13. We also found that postnatal sound exposure in this epoch led to striking alterations in the cortical representation of sound intensity.

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“…This functional development is substantially influenced by the structure of environmental acoustic inputs in early life, especially within a critical-period time window when the system is most susceptible to alteration by environmental auditory inputs (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). Introduction of synchronous inputs into the auditory pathway achieved by exposing rat pups to pulsed noise during this time window, for example, results in a disrupted tonotopicity and broader-than-normal frequency tuning curves in the primary auditory cortex (A1).…”

mentioning

confidence: 99%

Intensive training in adults refines A1 representations degraded in an early postnatal critical period

Zhou

Merzenich

2007

Proc. Natl. Acad. Sci. U.S.A.

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The spectral, temporal, and intensive selectivity of neurons in the adult primary auditory cortex (A1) is easily degraded in early postnatal life by raising rat pups in the presence of pulsed noise. The nonselective frequency tuning recorded in these rats substantially endures into adulthood. Here we demonstrate that perceptual training applied in these developmentally degraded postcritical-period rats results in the recovery of normal representational fidelity. By using a modified go/no-go training strategy, structured noise-reared rats were trained to identify target auditory stimuli of specific frequency from a set of distractors varying in frequency. Target stimuli changed daily on a random schedule. Consistent with earlier findings, structured noise exposure within the critical period resulted in disrupted tonotopicity within A1 and in degraded frequency-response selectivity for A1 neurons. Tonotopicity and frequency-response selectivity were normalized by perceptual training. Changes induced by training endured without loss for at least 2 months after training cessation. The results further demonstrate the potential utility of perceptual learning as a strategy for normalizing deteriorated auditory representations in older (postcritical-period) children and adults.adult plasticity ͉ cortical plasticity ͉ perceptual training ͉ primary auditory cortex ͉ tonotopic organization

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Directional responses by kittens to an auditory stimulus

Cited by 27 publications

References 16 publications

Postnatal development of sound pressure transformations by the head and pinnae of the cat: Monaural characteristics

Postnatal development of sound pressure transformations by the head and pinnae of the cat: Monaural characteristics

Critical Period Window for Spectral Tuning Defined in the Primary Auditory Cortex (A1) in the Rat

Intensive training in adults refines A1 representations degraded in an early postnatal critical period

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