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His auditory nerve was tested by evoking responses with normal auditory nerve potentials at 10 dB bilaterally. The results of the brainstem auditory evoked responses waves were normal, but an abnormal complex IV-V suggested that the pathways were functioning through the brainstem, but there was a lesion present in the mid-brain.
The auditory cortex takes part in the spectrotemporal, meaning involving time and frequency, analysis of the inputs passed on from the ear. The cortex then filters and passes on the information to the dual stream of speech processing. [5] The auditory cortex's function may help explain why particular brain damage leads to particular outcomes.
The auditosensory cortex takes part in the reception and processing of auditory nerve impulses, which passes sound information from the thalamus to the brain. Abnormalities in this region are responsible for many disorders in auditory abilities, such as congenital deafness , true cortical deafness, primary progressive aphasia and auditory ...
Mismatch negativity was greatly reduced for temporal-parietal damaged patients when the auditory stimulus was presented to the contralateral ear of the lesion side of the brain. This adheres to the theory of auditory sensory memory being stored in the contralateral auditory cortex of ear presentation. [13]
Recordings from the anterior auditory cortex of monkeys while maintaining learned sounds in working memory, [46] and the debilitating effect of induced lesions to this region on working memory recall, [84] [85] [86] further implicate the AVS in maintaining the perceived auditory objects in working memory. In humans, area mSTG-aSTG was also ...
Graph showing a typical Auditory Brainstem Response. The auditory brainstem response (ABR), also called brainstem evoked response audiometry (BERA) or brainstem auditory evoked potentials (BAEPs) or brainstem auditory evoked responses (BAERs) [1] [2] is an auditory evoked potential extracted from ongoing electrical activity in the brain and recorded via electrodes placed on the scalp.
Research on sensory gating has been primarily occurring in cortical areas where the stimulus is consciously identified because it is a less invasive means of studying sensory gating. Studies on rats also show the brain stem, thalamus, and primary auditory cortex play a role in sensory gating for auditory stimuli. [4]
Some studies suggest that auditory weakness is only present for explicit memory (direct recall), rather than implicit memory. [17] When test subjects are presented with auditory versus visual word cues, they only perform worse on directed recall of a spoken word versus a seen word, and perform about equally on implicit free-association tests.