|Series||Canadian theses = Thèses canadiennes|
|The Physical Object|
Physiology of the cochlear nucleus Spherical vs globular bushy cells Circuitry in dorsal cochlear nucleus. Differentiating cell types in the cochlear nucleus • By anatomical shape • Using soma shape with Nissl stains: Osen precise timing than auditory . Cochlear nerve fiber degeneration, ipsilateral to the exposed ears, was traced to regions of the cochlear nucleus representing the damaged parts of the cochlea. In silver impregnations of a deafferented zone in the posteroventral cochlear nucleus, the concentration of axons decreased by 43% after 1 month and by 54% after 2 by: One of the major CN inhibitory interneurons is the D-stellate neuron in the ventral cochlear nucleus (VCN) [14,15,16,17,18].They receive excitatory inputs from the auditory nerve, and provide glycinergic inhibition locally within the VCN and to the dorsal cochlear nucleus (DCN) [5,17,19,20,21], as well as to the contralateral CN [15,22,23].In response to tones, D-stellate Author: Yong Wang, Meijian Wang, Ruili Xie. The auditory nerve penetrates through the skull and forms a first relay station at the level of the cochlear nuclei. Nerve fibers entering the cochlear nuclei are distributed in an organised, tonotopic, manner: those that come from the apex of the cochlea (low frequencies) remain at the surface of the cochlear nuclei, whereas those of the base (high frequencies) penetrate deeper into the nuclei.
The volumes of the auditory brainstem nuclei and age-related auditory brainstem response (ABR) thresholds were analyzed in homozygote (je/je) and heterozygote (je/+) jerker mutant mice. Altogether 97 mice were used in the study. Je/je mice never develop any hearing. The dorsal (DCN) and ventral (VCN) cochlear nuclei were found to have stopped their growth Cited by: Effects of Early Auditory Deprivation on Working Memory and Reasoning Abilities in Verbal and Visuospatial Domains for Pediatric Cochlear Implant Recipients for z scores for normal . Under barbiturate anaesthesia, cortical potentials could be recorded from the contralateral auditory cortex in response to bipolar electrical stimulation of the cochlea in spite of total auditory deprivation. Threshold, morphology and latency of the evoked potentials varied with the location of the recording electrode. auditory brainstem implant -can be used in cases where cochlear implant is not viable (when patient has neurofibromatosis type II) -electrode array aligned with the VCN may interfere with facial and glossopharyngeal cranial nerves, so more dorsal placement to .
In the ventral cochlear nucleus, auditory nerve fibers enter the brain via the nerve root in the VCN. The ventral cochlear nucleus is divided into the anterior ventral cochlear nucleus and the posterior ventral cochlear nucleus. In the VCN, auditory nerve fibers bifurcate, the ascending branch innervates the AVCN and the descending branch innervates the PVCN and then continue to the dorsal cochlear nucleus. The orderly innervation by auditory nerve fibers NeuroLex ID: birnlex_ Neurometric amplitude-modulation detection threshold measured in the chinchilla ventral cochlear nucleus following sensorineural hearing loss The Journal of the Acoustical Society of America , (); Cited by: 1. Auditory neuropathy (AN) is a hearing disorder that presents with a grossly abnormal or absent neural response as measured by evoked potentials in the presence of normal outer hair cell function evidenced by present otoacoustic emissions or cochlear microphonics. There are three times as many outer hair cells (OHC) as inner hair cells (IHC), yet IHC transmit virtually all acoustic information to the brain as they synapse with 90–95% of type I auditory nerve fibers. Here we review a comprehensive series of experiments aimed at determining how loss of the IHC/type I system affects hearing by selectively destroying these Cited by: