Effects of monaural and binaural sound deprivation on cell development in the anteroventral cochlear nucleus of rats
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Dichotic listening deficits in amblyaudia are characterized by aberrant neural oscillations in auditory cortex
2021, Clinical NeurophysiologyReversible external auditory canal ligation (REACL): A novel surgical technique to induce transient and reversible hearing loss in developing rats
2019, Journal of Neuroscience MethodsCitation Excerpt :The purpose of the present paper is to describe a novel method to induce a reversible state of hearing loss in young and developing rodents. It consists of an adaptation of an already existing technique—external auditory canal ligation (EACL)—that has been previously used for hearing loss research (Brugge et al., 1985; Clopton and Silverman, 1977; Coleman, 1981; Coleman et al., 1982; Coleman and O’Connor, 1979; Moore and Irvine, 1981; Silverman and Clopton, 1977) and mimics congenital conductive hearing loss. Our method consists in a reversible EACL (REACL) procedure where a ligation suture is placed distally around the cartilaginous canal to minimize the trauma to the EAC, allowing for a subsequent reopening of the canal.
A review of the effects of unilateral hearing loss on spatial hearing
2019, Hearing ResearchCitation Excerpt :From a clinical standpoint, understanding how the brain responds to conductive hearing loss can provide insight into the consequences of otitis media with effusion and other disorders that affect sound transmission through the external or middle ear. A number of studies in animals have examined the effects of unilateral hearing loss during development on the morphology (Coleman and O'Connor, 1979; Webster and Webster, 1979; Moore et al., 1989), connectivity (Moore et al., 1989) and response properties (Clopton and Silverman, 1977; Silverman and Clopton, 1977; Moore and Irvine, 1981; Brugge et al., 1985; Popescu and Polley, 2010; Polley et al., 2013; Keating et al., 2013, 2015) of neurons at different levels of the auditory system. The results of many (though not all) of these studies are consistent with unilateral hearing loss causing a weakening of the representation of the deprived ear and a strengthening of the representation of the intact ear.
Maturation of auditory brainstem responses in young children with congenital monaural atresia
2017, International Journal of Pediatric OtorhinolaryngologyCitation Excerpt :Several studies involving animal experiments have shown that partial acoustic deprivation during sensitive periods resulting from conductive hearing loss leads to species-specific, mostly subtle functional changes in the afferent auditory pathway [3–5]. All of these studies outline the meaning of auditory input during the early ontogenetic development phases of the auditory pathway [17,18]. The data from our group of patients show that the AL of Jewett Wave V in the normal ears and the IPL Jewett I-V show an age proportional decrease of latencies and interpeak latencies similar to previous studies in children with normal hearing [15]; (see Fig. 6).
Induction of single-sided deafness in the newborn rat and its consequence for cochlear nucleus volume development
2016, Hearing ResearchCitation Excerpt :Glial cell death or reduced glial proliferation may be a factor of retarded volume development, but again does not play a major role upon induction of cochlear dysfunction beyond the critical developmental period (Campos Torres et al., 1999). Coleman and O'Connor (1978) removed the middle ear bones in rats on days P10 or P16. When this is done unilaterally by P10, a reduction of the size of large spherical cell areas can be observed on the deprived side (21% of cross sectional area).
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We wish to thank W. J. Clerici for histological assistance and Geraldine B. Kimpson for typing the manuscript. This research was supported in part by National Institutes of Health Biomedical Research Support Grant 5 S07 RR07160.