Effects of auditory pathway
anatomy and deafness characteristics?
However, as our patient, the lesions which effect the auditory pathway
at level more distal than brainstem mostly could not detected by imaging (3).
Notably, different stages of the auditory pathway
are evaluated using the eCAP recordings (peripheral action potentials of auditory nerve, corresponding to wave I) and eABR recordings (central responses of the VIII nerve, wave II; cochlear nuclei, wave III; nucleus of the lateral lemniscus, wave IV-not pronounced in eABR; inferior colliculus, wave V) .
To investigate the effect of excitability changes of hippocampus on the auditory pathway
, the hippocampus was electrically stimulated and neural excitability in the auditory cortex (AC) was monitored.
For patients with severe sensory-neural hearing loss, cochlear implants (CI) are a good choice of treatment to bypass the malfunctioning or missing inner hair cells as they transmit the energy directly to the auditory pathway
Noise leads to a combination of physiological and anatomical changes within the central auditory pathway
as well as mechanical and metabolic damage in the cochlea .
It tests the integrity of the auditory pathway
from the thalamic medial geniculate body up to the primary auditory cortex.
Given that CMT affects the retrocochlear auditory pathway
, there have been theoretical concerns that CI is incapable of providing meaningful auditory stimulation.
Early exposure to an acoustic environment can quickly change the sensitivity and frequency selectivity of neurons at many levels along the auditory pathway
suggested that the lesions of AN lied in the VIII brain auditory branch before the cochlea entering the brainstem, including: inner hair cells, synaptic connections between inner hair cells and VIII brain the nerve fibers, spiral ganglion, cochlear nerve fibers, VIII brain nerve and its part associated with the above sites, but they did not include brainstem auditory pathway
lesions.1 In this study, the auditory brainstem response of all AN patients from wave I was not induced (>l00 dB SPL), except that wave V was induced from one ear of one patient, and from 19 ears of 14 patients.
Hearing loss in early infancy affects maturation of the auditory pathway
. Medicine and Child Neurology, 44(2), 123-129.
Different patterns of echo signals at 50 kHz were encoded into low-frequency signals (a few Hz) according to auditory system transduction and codification processes, in order to bypass the auditory pathway
and present the signal directly into the inferior colliculus (IC) of Wistar rats [12-14].