AUDITORY EVOKED RESPONSES Meaning and
Definition
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Auditory Evoked Responses refer to the electrical activities generated in the brain as a result of receiving and processing sound stimuli. They are also known as auditory evoked potentials (AEPs) or auditory event-related potentials (AERPs). These responses are measured using electroencephalography (EEG), which records the brain's electrical activity through electrodes placed on the scalp.
When a sound is presented to the auditory system, a series of electrical impulses is triggered, starting from the inner ear and traveling through the auditory pathway to the auditory cortex in the brain. These impulses create a waveform pattern that represents the brain's response to the sound stimulus. By analyzing this waveform, researchers can gain insights into various aspects of auditory processing, including sensory perception, attention, and cognitive functioning.
Auditory evoked responses can be categorized into different components based on the timing and morphology of the waveform. The most well-known components include the auditory brainstem response (ABR), which reflects early neural activity in the brainstem, and the middle and late latency responses (MLRs and LLRs), which reflect cortical processing. These components provide valuable information about the integrity of the auditory system and can help diagnose and monitor hearing disorders, such as auditory neuropathy and auditory processing disorders.
In summary, auditory evoked responses are the brain's electrical activities generated in response to sound stimuli. They offer a non-invasive and objective method to study auditory processing and provide valuable clinical information about hearing and auditory system functioning.
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