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20 Cards in this Set
- Front
- Back
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Three fundamental types of sensory areas in the cortex |
Primary sensory cortex Secondary seonsory cortex Association cortex |
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Primary sensory cortex |
receivesinfo from thalamus |
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Secondary sensory cortex |
receivesinfo from primary sensory cortex or from other secondary sensory cortices |
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Association cortex |
receivesinput from more than one sensory area |
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Sound to Auditory Nerve |
Outer ear -> auditory canal Eardrum (tympanic membrane) vibrates Oval window vibrates Flud in cochlea vibrates Organ of Corti |
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Three Ossicles |
Malleus Incus Stapes |
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Round window |
Destroy cochlea fluid |
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Higher Frequency |
Produce greater activation near the windows |
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Lower frequencies |
produce greater activation near the tip |
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Organization of Auditory system ** |
Tonotopic |
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Medial Superior Olive |
cellsrespond to slight differences in sounds’ arrival times from the two ears |
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Lateral Superior Olive |
cellsrespond to slight differences in amplitude in sound from the two ears |
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Superior Colliculus |
map ofauditory space |
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Primary Auditory Cortex |
Temporal Lobe within Lateral Fissure |
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Secondary Auditory Cortex |
-Belt - Parabelt |
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Prefrontal Cortex |
Anterior Pathway; "What" |
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Posterior parietal Cortex |
Posterior Pathway "where" |
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Auditory Cortex Damage |
Hard to get clean lesion naturally; rarely causes severe permanet effects |
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Deafness |
–Diffuse,parallel auditory pathways make it hard to damage in entirety –Use result from damageto inner ear/middle ear/nerve coming from ear |
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Tinnitus |
Frequent or constant ringing in ears -- experienced by many people with nerve deafness - Sometimes occurs after damage to the cochlea –-axons representing other part of the body invade partsof the brain previously responsive to sound. –-Similar to the mechanisms of phantom limb.d4z8] |
