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Table of contents

Author: Dean Hillman

Homepage: http://www.mindoverbrain.com/

AUDITORY SYSTEM Part II FUNCTIONAL ROLE OF AUDITION Hearing Pathway Summary PRIMARY AFFERENT AUDITORY Pathway Neuronal Coding of Sound Hair cell Function- Inner/outer Physiology of Hearing Physiology of Hearing- Intensity Physiology of Hearing- Frequency Slide 10 Cochlear Nerve- PERIPHERAL PROJECTION Modiolus Receptor Cell Activation of Auditory Afferents Distribution of Primary Afferents Central Projections of 8th Nerve- Best Frequencies- Tuning curves PRIMARY AUDITORY CENTER AUDITORY PATHWAY CENTERS Binaural Reception and Direction Detection DIRECTION-DETECTION AUDITORY PROJECTION PATHWAY ASCENDING AUDITORY BRAINSTEM PATHWAYS Superior Olivary Complex Superior Olive Efferent Projections Ventral Nucleus of Lateral Lemniscus- Nuc of LL at 5th nerve PONS MidBrain Auditory Pathway DESCENDING LIMB OF EFFERENT SYSTEM Olivocochlear Bundle- Efferents to Outer Hair cell Inferior Colliculus- Descending Reflexes Inferior Colliculus- Reflex Center Brachium of Inferior Colliculus AUDITORY RELAY Equivalent Dorsal Thalamus Medial Geniculate Body Cortical Hearing Pathway Cerebral Audition Cerebral Audition - Area 41 Association Cortex TONOTOPIC MAPS OF AUDITION Occurs Along The Pathway Bilateral Auditory path Bilateral Auditory Path Stapes -Stapedius Reflex Otoacoustic Emissions Auditory Brainstem Response (ABR) (BAEP) SUMMARY OF THE AUDITORY PATHWAY Auditory Physiology Summary SUMMARY OF FUNCTION