Binaural noise stimulation of auditory callosal fibers of the cat: responses to interaural time delays

Poirier, Pierre; Leporé, Franco; Provençal, Christiane; Ptito, Maurice; Guillemot, Jean-Paul

doi:10.1007/bf00229853

Cited by 13 publications

(9 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A previous study in 5- to 10-year-old children using a visuo-motor adaptation paradigm with auditory pre- and post-adaptation test phases showed cross-modal effects in the children, independent of age group (King et al 2009). It is important to note here that azimuthal (in the horizontal plane) sound localization depends to a large part on interaural time differences registered in corpus callosum (CC) fibers, as shown in animal experiments (Poirier et al 1995). In humans, the important role of the CC is illustrated by findings that pointing toward auditory stimuli is less accurate in patients with callosal agenesis (Poirier et al 1993).…”

Section: Introductionmentioning

confidence: 91%

Development of kinesthetic-motor and auditory-motor representations in school-aged children

Kagerer

Clark

2015

Exp Brain Res

View full text Add to dashboard Cite

In two experiments using a center-out task, we investigated kinesthetic-motor and auditory-motor integrations in 5- to 12-year-old children and young adults. In experiment 1, participants moved a pen on a digitizing tablet from a starting position to one of three targets (visuo-motor condition), and then to one of four targets without visual feedback of the movement. In both conditions, we found that with increasing age, the children moved faster and straighter, and became less variable in their feedforward control. Higher control demands for movements toward the contralateral side were reflected in longer movement times and decreased spatial accuracy across all age groups. When feedforward control relies predominantly on kinesthesia, 7- to 10-year-old children were more variable, indicating difficulties in switching between feedforward and feedback control efficiently during that age. An inverse age progression was found for directional endpoint error; larger errors increasing with age likely reflect stronger functional lateralization for the dominant hand. In experiment 2, the same visuo-motor condition was followed by an auditory-motor condition in which participants had to move to acoustic targets (either white band or one-third octave noise). Since in the latter directional cues come exclusively from transcallosally mediated interaural time differences, we hypothesized that auditory-motor representations would show age effects. The results did not show a clear age effect, suggesting that corpus callosum functionality is sufficient in children to allow them to form accurate auditory-motor maps already at a young age.

show abstract

Section: Introductionmentioning

confidence: 91%

Development of kinesthetic-motor and auditory-motor representations in school-aged children

Kagerer

Clark

2015

Exp Brain Res

View full text Add to dashboard Cite

show abstract

“…Cells possibly involved in soundã Guarantors of Brain 2002Brain (2002, 125, 1039±1053 source localization were also described by Middlebrooks and Pettigrew (1981). Poirier et al (1989Poirier et al ( , 1995 examined this problem more directly by recording in the auditory portion of the callosum of normal cats. The results showed that callosal ®bres are involved in the processing of both the null interaural time delay, which simulates auditory midline localization, and speci®c, non-zero interaural time delays, suggesting that these ®bres prefer sounds situated at spatial locations other than the midline.…”

Section: Introductionmentioning

confidence: 94%

“…The corpus callosum is the principal neocortical commissure and allows the transfer of sensory and motor information between the hemispheres. In the auditory system, the corpus callosum interconnects different cortical areas, in particular the primary auditory area, which receives input from both ears, thereby providing for the integration of binaural cues (Imig and Brugge, 1978;Kelly and Wong, 1981;Imig et al, 1982Imig et al, , 1986Code and Winer, 1985;Jouandet et al, 1986;Rouiller et al, 1991;Poirier et al, 1995). In fact, sound localization depends upon the combined operation of binaural and monaural cues.…”

Section: Introductionmentioning

confidence: 99%

Sound localization in callosal agenesis and early callosotomy subjects: brain reorganization and/or compensatory strategies

Lessard¹,

Leporé²,

Villemagne³

et al. 2002

Brain

Self Cite

View full text Add to dashboard Cite

In order to evaluate the callosal involvement in sound localization, the present study examined the response accuracy of acallosal and early callosotomized subjects to monaural and binaural auditory targets presented in three-dimensional space. In these subjects, bilateral localization cues, such as interaural time and level differences, are integrated at the cortical and subcortical levels without the additional support of the callosal commissure. Because acallosal and early-callosotomized subjects have developed with this reduced source of binaural activation of cortical cells, they might have perfected their ability to use monaural sound localization cues. This hypothesis was tested by assessing localization performance under both binaural and monaural listening conditions. Five subjects with callosal agenesis, one callosotomized subject operated early in life and 19 control subjects were asked to localize broad-band noise bursts (BBNBs) of fixed intensity in the horizontal plane in an anechoic chamber. BBNBs were delivered through randomly selected loudspeakers. Two conditions were tested: (i) localization of a stationary sound source; and (ii) localization of a moving sound source. Listeners had to report the apparent stimulus location by pointing to its perceived position on a graduated perimeter. The results indicated that the acallosal subjects were less accurate than controls, but only in the binaural moving sound condition. More interestingly, in the monaural testing conditions, some of the acallosal subjects and the early-callosotomized subject performed significantly better than control subjects. This suggests that, because of the absence of the corpus callosum, these subjects compensate for their reduced access to cortically determined binaural cues by making more efficient use of monaural cues.

show abstract

“…Also, callosal connections are more extensive in the rostral part of A1 (i.e., in the high-frequency representation) (Imig and Brugge, 1978;Bozhko and Slepchenko, 1988). Because of the acoustic shadow of the head, a coherent representation of space throughout the midline requires callosal interactions Imig et al, 1986;Poirier et al, 1995). This is of less significance in the lower frequency range, in which no head shadow exists (Ͻ3-6 kHz for the cat).…”

Section: Hearing Controlsmentioning

confidence: 99%

Spatiotemporal Patterns of Cortical Activity with Bilateral Cochlear Implants in Congenital Deafness

Kral¹,

Tillein²,

Hubka³

et al. 2009

J. Neurosci.

View full text Add to dashboard Cite

Congenital deafness affects developmental processes in the auditory cortex. In this study, local field potentials (LFPs) were mapped at the cortical surface with microelectrodes in response to cochlear implant stimulation. LFPs were compared between hearing controls and congenitally deaf cats (CDCs). Pulsatile electrical stimulation initially evoked cortical activity in the rostral parts of the primary auditory field (A1). This progressed both in the approximate dorsoventral direction (along the isofrequency stripe) and in the rostrocaudal direction. The dorsal branch of the wavefront split into a caudal branch (propagating in A1) and another smaller one propagating rostrally into the AAF (anterior auditory field). After the front reached the caudal border of A1, a "reflection wave" appeared, propagating back rostrally. In total, the waves took ϳ13-15 ms to propagate along A1 and return back. In CDCs, the propagation pattern was significantly disturbed, with a more synchronous activation of distant cortical regions. The maps obtained from contralateral and ipsilateral stimulation overlapped in both groups of animals. Although controls showed differences in the latency-amplitude patterns, cortical waves evoked by contralateral and ipsilateral stimulation were more similar in CDCs. Additionally, in controls, LFPs with contralateral and ipsilateral stimulation were more similar in caudal A1 than in rostral A1. This dichotomy was lost in deaf animals. In conclusion, propagating cortical waves are specific for the contralateral ear, they are affected by auditory deprivation, and the specificity of the cortex for stimulation of the contralateral ear is reduced by deprivation.

show abstract

Binaural noise stimulation of auditory callosal fibers of the cat: responses to interaural time delays

Cited by 13 publications

References 59 publications

Development of kinesthetic-motor and auditory-motor representations in school-aged children

Development of kinesthetic-motor and auditory-motor representations in school-aged children

Sound localization in callosal agenesis and early callosotomy subjects: brain reorganization and/or compensatory strategies

Spatiotemporal Patterns of Cortical Activity with Bilateral Cochlear Implants in Congenital Deafness

Contact Info

Product

Resources

About