Anatomy and Physiology

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Anatomy and Physiology

• Anatomy
• Outer Ear
• Middle Ear
• Inner Ear
• Central Auditory System

• Physiology
• Outer Ear
• Middle Ear
• Inner Ear
• Central Auditory System

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Cross Section
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Cross Section (outer ear)
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Cross Section (middle ear)
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Cross Section (inner ear)
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Cross Section (central pathways)
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Outer Ear
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Pinna
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Pinna (photo)
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Pinna (helix)
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Pinna (helix)
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Pinna (lobe)
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Pinna (tragus)
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Pinna (concha)
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Pinna (scaphoid fossa)
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Pinna (triangular fossa)
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Pinna (anti-helix)
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Pinna (anti-tragus)
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Pinna (Darwins tubercle)
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Pinna (inter-tragal notch)
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Ear Canal
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Ear Canal
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Ear Canal (cartilaginous portion)
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Ear Canal (osseous portion)
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Ear Canal (sebacious cerumenous glands)
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Ear Canal (isthmus)
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Function of the Outer Ear

• Pinna
• Localization on the vertical plane
• Resonator at 5000 Hz
• Ear Canal
• Pathway for sound
• Protection of tympanic membrane
• Keeps tympanic membrane at a constant temperature
  and humidity.
• Resonator for 1500 to 5000 Hz

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Summary

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