Surface topography of the cochlear nuclei in humans: Two- and three-dimensional analysis

Terr, Leonid I.; Edgerton, Bradly J.

doi:10.1016/0378-5955(85)90130-3

Cited by 39 publications

(11 citation statements)

References 15 publications

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“…This finding is probably related to the fact that current passing through INSELs will not spread along superficial layers such as pia mater, pontobulbar fibers, and cerebellar peduncles overlaying portions of the CN. 26,33,36,[48][49][50] In contrast with surface electrodes, INSELs will be injected directly into the CN and-especially in the case of electrodes placed in the ventral portion-will access secondary auditory neurons and auditory nerve terminals, which are scarcely found in the dorsal CN in the species under investigation. 25 Data regarding the dynamic range of stimulation of the CN are less uniform in the literature.…”

Section: Fig 2 Traces Of Brainstem Auditory Evoked Potentials (Baeps)mentioning

confidence: 99%

Far-field responses to stimulation of the cochlear nucleus by microsurgically placed penetrating and surface electrodes in the cat

Rosahl¹,

Mark²,

Herzog³

et al. 2001

Journal of Neurosurgery

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Section: Fig 2 Traces Of Brainstem Auditory Evoked Potentials (Baeps)mentioning

confidence: 99%

Far-field responses to stimulation of the cochlear nucleus by microsurgically placed penetrating and surface electrodes in the cat

Rosahl¹,

Mark²,

Herzog³

et al. 2001

Journal of Neurosurgery

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“…2 In the following years, Leonid Terr and Bradley Edgerton created 3-dimensional models based on light microscopy analysis in cadaveric specimens to determine the optimal surgical approach to the cochlear nucleus complex. 3,4 The first attempt to systematically assess the dimensions of the nucleus was published in an almost invisible German anatomy journal in 1991. 5 In the meantime, several patients had already been implanted with surface ABI electrodes in the lateral recess of the fourth ventricle.…”

Section: Anatomy and Auditory Brainstem Implantsmentioning

confidence: 99%

Letter

Rosahl

2016

Neurosurgery

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“…The surface of the ventral cochlear nucleus and that of the dorsal cochlear nucleus share the floor of the lateral recess of the fourth ventricle. The anterior ventral nucleus occupies the most rostral part of the cochlear nucleus [50,51]. Each auditory nerve fiber bifurcates and one of the branches bifurcates again, and these three branches connect to cells in one of the three divisions of the cochlear nucleus.…”

Section: Anatomical Organization Of the Cochlear Nucleusmentioning

confidence: 99%

Physiological Basis for Cochlear and Auditory Brainstem Implants

Møller

2006

Cochlear and Brainstem Implants

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Cochlear implants bypass functions of the cochlea that have been regarded to be fundamental for discrimination of the frequency (or spectrum). Frequency discrimination is essential for discrimination of sounds, including speech sounds, and the normal auditory system is assumed to make use of both (power) spectral and temporal information for frequency discrimination. Spectral information is represented by the place on the basilar membrane that generates the largest amplitude of vibration on the basilar membrane. Evidence has been presented that the temporal representation of frequency is more robust than the place representation and thus regarded more important for speech discrimination. The fact that some cochlear implants provide good speech discrimination using only information about the energy in a few spectral bands seems to contradict these studies. In that way, frequency discrimination may be similar to trichromatic color vision, which is based on the energy in only three different spectral bands of light, accomplished by different color-sensitive pigments in the cones of the retina. Cochlear nucleus implants (ABIs) also bypass the auditory nerve, which does not perform any processing. Therefore, it may be expected that ABIs are equally efficient as cochlear implants. However, experience from the use of ABIs in patients with bilateral vestibular schwannoma has not been encouraging, but recent studies of the use of ABIs in patients with other causes of injuries to the auditory nerve have shown similar speech discrimination as achieved with modern cochlear implants. Cochlear implants and ABIs are successful in providing speech discrimination because of redundancy in the processing in the ear, redundancy of the speech signal and because the auditory nervous system has a high degree of plasticity. Expression of neural plasticity makes the auditory nervous system adapt to the change in demands of processing of the information provided by cochlear implants.

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Surface topography of the cochlear nuclei in humans: Two- and three-dimensional analysis

Cited by 39 publications

References 15 publications

Far-field responses to stimulation of the cochlear nucleus by microsurgically placed penetrating and surface electrodes in the cat

Far-field responses to stimulation of the cochlear nucleus by microsurgically placed penetrating and surface electrodes in the cat

Letter

Physiological Basis for Cochlear and Auditory Brainstem Implants

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