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Auditory Pathways in the human brain
The auditory pathway in the human brain represents the sequence of structures and processes that transmit auditory information. It begins with the mechanical activation of hair cells, which generates neural impulses. These impulses travel along the auditory nerve to the brain. The auditory information is then shuttled sequentially to the inferior colliculus, the medial geniculate nucleus of the thalamus, and finally to the auditory cortex in the temporal lobe for higher-level processing.
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Cochlear nucleus
Tonotopic mapping of the Inferior Colliculus
Primary auditory cortex (A1)
Auditory Parallel Processing
A patient has a small, localized brainstem lesion. While they can still hear sounds clearly with both ears and identify what the sounds are (e.g., a bell, a voice), they have significant difficulty determining the direction or location of the sound source. This specific deficit in sound localization suggests damage to which of the following structures?