The final neuron of the primary auditory pathway links the thalamus to the auditory cortex, where the message, already largely decoded during its passage through the previous neurons in the pathway, is recognized, memorized and perhaps integrated into a voluntary response. Close in proximity to the Wernickes area is the primary auditory cortex. Sensory receptors: Specialized cells that detect sensory stimuli and convert them into neural. Sometimes, the hearing loss is caused by damage to the nerve that carries the signals to the brain. These two relays play an essential rôle in the localisation of sound.Ī last relay, before the cortex, occurs in the medial geniculate body (thalamus ) it's here that an important integration occurs: preparation of a motor response (eg vocal response). consists of cranial nerves (12 pairs) and spinal nerves (31 pairs) and is. Sensation is the process by which we receive, transform, and process stimuli that impinge on our sensory organs into neural impulses, or signals, that the brain uses to create experiences of vision, hearing, taste, smell, touch, and so on. Sensorineural hearing loss (SNHL) is caused by damage to these special cells, or to the nerve fibers in the inner ear. Leaving this relay, a third neuron carries the mesage up to the level of the inferior colliculus (mesencephalus ). The second major relay in the brain stem is in the superior olivary complex: the majority of the auditory fibres synapse there having already crossed the midline. This translates into our ability to hear the sounds of nature, to appreciate the beauty. The first relay of the primary auditory pathway occurs in the cochlear nuclei in the brain stem, which receive Type I spiral ganglion axons (auditory nerve) at this level an important decoding of the basic signal occurs: duration, intensity and frequency. Our auditory system converts pressure waves into meaningful sounds.
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