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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 defines Brodmann area 42, which is part of the primary auditory cortex.It is also known as the posterior transverse temporal area, [2] located superiorly within the temporal lobe of the cerebral cortex.
Since cortical deafness and auditory agnosia have many similarities, diagnosing the disorder proves to be difficult. Bilateral lesions near the primary auditory cortex in the temporal lobe are important criteria. Cortical deafness requires demonstration that brainstem auditory responses are normal, but cortical evoked potentials are impaired.
Wernicke's area receives information from the auditory cortex, and functions to assign word meanings. [19] This is why damage to this area results in meaningless speech, often with paraphasic errors and newly created words or expressions.
The primary auditory cortex is located on the temporal lobe of the cerebral cortex. This region is important in music processing and plays an important role in determining the pitch and volume of a sound. [1] Brain damage to this region often results in a loss of the ability to hear any sounds at all.
The superior temporal gyrus also includes Wernicke's area, which (in most people) is located in the left hemisphere. It is the major area involved in the comprehension of language. The superior temporal gyrus is involved in auditory processing, including language, but also has been implicated as a critical structure in social cognition. [2] [3]
Finally, the signal goes to the auditory cortex of the temporal lobe to be interpreted as sound. [83] Hearing loss is most commonly caused by long-term exposure to loud noises, from recreation or from work, that damage the hair cells, which do not grow back on their own. [84] [85] [9]
The inferior colliculus has three subdivisions – the central nucleus, the dorsal cortex by which it is surrounded, and an external cortex which is located laterally. [1] The inferior colliculus is the first place where vertically orienting data from the fusiform cells in the dorsal cochlear nucleus can finally synapse with horizontally ...