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Special Senses

Special Senses. Auditory Sense. Auditory Sense. The Ear …. Auditory Sense. Pinna Auricle – funnel like Auditory Canal Tube Transfers sound waves to eardrum Tympanic membrane Eardrum Begins vibrations from sound wave. Auditory Sense. Video Clip. Ossicles : Malleus Bones -> Hammer

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Special Senses

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  1. Special Senses Auditory Sense

  2. Auditory Sense The Ear …

  3. Auditory Sense • Pinna • Auricle – funnel like • Auditory Canal • Tube • Transfers sound waves to eardrum • Tympanic membrane • Eardrum • Begins vibrations from sound wave

  4. Auditory Sense Video Clip • Ossicles: • Malleus Bones -> Hammer • Incus Bones -> Anvil • Stapes Bones -> Stirrup

  5. Auditory Sense • Cochlea • Bony chamber • Has receptors • Perilymph • Fluid within Cochlea • Oval Window • Receives vibrations from stapes bone & • Transfers it to perilymph inside cochlea • Round Window • Relieves inside pressure of cochlea

  6. Balance & Equilibrium • Vestibular Complex • Semicircular canal • Utricles & Saccules • respond to movement of the body • Semicircular canal • Respond to rotational movement of the head

  7. Balance & Equilibrium • Utricles & Saccules • Contains hair cells • Respond to movement • Maculae • Contains hair cells • Responds to Gravity & Acceleration

  8. Balance & Equilibrium • Stereocilia& Kinocilia • Extend from receptor hair cells • Move when head moves

  9. Balance & Equilibrium • Otolith • Gelatin (otolithic membrane) & stone cells • Stone cells • Calcium Carbonate • Bend receptor hair cells when head tilts • Otoconia(stones)

  10. Balance & Equilibrium • Ampulla • Swelling at the base • Contains receptors • Crista • Region in Ampulla • Contains receptor cells (hair cells) • Cupula • Gelatin surrounding hair cells

  11. Review: Balance & Equilibrium Crista in Ampulla Vestibular Complex Semicircular canal Utricles, Saccules & Maculae Cupula Crista Ampulla Stone Cells Stereocilia & Kinocilia Otolith

  12. Balance & Equilibrium

  13. Balance & Equilibrium • Eustacian tube • Equalizes pressure between the inside & outside of the ear

  14. Hearing & Cochlear Anatomy / Physiology Video Clip

  15. Hearing & Cochlear • Cochlear duct • Contains the spiral organ • Site where impulse is made • Vestibular duct • Upper tube • Receives pressure waves in perilymph from Oval Window • Tympanic duct • Lower tube • Pressure waves move a membrane causing hair cells to move

  16. Hearing Video Clip • Spiral Organ • In the Cochlear duct • Contains hair cells that sit on top if the basilar membrane • Basilar Membrane • Moves when pressure waves flow through the tympanic duct • Causing hair cells to move • Tectorial Membrane • Stationary plate that the hair cells are pushed into during pressure waves

  17. Hearing • Basilar Membrane • Moves when pressure waves flow through the tympanic duct • Causing hair cells to move • Tectorial Membrane • Stationary plate that the hair cells are pushed into during pressure waves Tectorial Membrane Hair cells Basilar Membrane

  18. Hearing

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