Binaural Stimulation Through Cochlear Implants in Postlingual Deafness

Abstract

Binaural stimulation through cochlear implants is advantageous compared with the monaural at the neurofunctional level because the pattern of brain activity is closer to the normal one.

Cochlear Implantation in Patients with Neurofibromatosis Type 2 and Patients with Vestibular Schwannoma in the Only Hearing Ear

“…Good results in speech discrimination achieved by these patients are published through the literature [37–42], in general: 80 to 90% in vowel recognition [40], 50–60% in bisyllable identification [40], 70 to 100% in word recognition [41], 65% to 80% in correct sentence recognition scores [37–39], 85% HINT in quiet score, and 65% in HINT in noise score [42]. Two factors implied in good performance were age at implantation and duration of deafness.…”

Cochlear implants and positron emission tomography

“…6,15 However, these activations were more diffuse and intense compared with those observed in normalhearing individuals ( Figure 1). 14,15,[17][18][19][20][21][22][23] In the bilateral implantee group, speech perception was associated with recruitment of the same regions of the temporal lobes as in their normalhearing controls. 14,15,[17][18][19][20][21][22][23] In the bilateral implantee group, speech perception was associated with recruitment of the same regions of the temporal lobes as in their normalhearing controls.…”

“…16 Furthermore, additional activations have been observed in the middle temporal gyri, Broca's area and its right homologue, cingulate gyrus, prefrontal cortex, visual cortices, and the cerebellum. 14 The activation of additional cortical regions in the unilateral implantee group suggests that these areas were recruited to compensate for their incoming degraded signal in order to process speech. 14 The activation of additional cortical regions in the unilateral implantee group suggests that these areas were recruited to compensate for their incoming degraded signal in order to process speech.…”

“…14,15,[17][18][19][20][21][22][23] The visual cortices seem to be the only extra-auditory region that is more consistently involved with language processing in unilateral implantee groups, despite the absence of any visual stimulation ( Figure 2). 14,15,[17][18][19][20][21][22][23] The visual cortices seem to be the only extra-auditory region that is more consistently involved with language processing in unilateral implantee groups, despite the absence of any visual stimulation ( Figure 2).…”

“…14,15,[17][18][19][20][21][22][23] The visual cortices seem to be the only extra-auditory region that is more consistently involved with language processing in unilateral implantee groups, despite the absence of any visual stimulation ( Figure 2). 21,22 However, in the study by Strelnikov et al, 14 activation in the visual cortices was not apparent in patients with bilateral cochlear implants. 21,22 However, in the study by Strelnikov et al, 14 activation in the visual cortices was not apparent in patients with bilateral cochlear implants.…”