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ANATOMY & PHYSIOLOGY I

BIO 211:. ANATOMY & PHYSIOLOGY I. SPECIAL SENSES LABS :. The EAR. Part 1 of 2. Dr. Lawrence G. Altman www.lawrencegaltman.com Some illustrations are courtesy of McGraw-Hill. Dr. Lawrence G. Altman www.lawrencegaltman.com Some illustrations are courtesy of McGraw-Hill. INCUS. STAPES.

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ANATOMY & PHYSIOLOGY I

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  1. BIO 211: ANATOMY & PHYSIOLOGY I SPECIALSENSES LABS: The EAR Part 1 of 2 Dr. Lawrence G. Altman www.lawrencegaltman.com Some illustrations are courtesy of McGraw-Hill. Dr. Lawrence G. Altman www.lawrencegaltman.com Some illustrations are courtesy of McGraw-Hill.

  2. INCUS STAPES 3 OSSICLES: equivalent- MALLEUS p. 470 OVAL WINDOW AURICLE AUDITORY TUBE a.k.a. EUSTACHIAN ROUND WINDOW TYMPANIC CAVITY TYMPANIC MEMBRANE a.k.a the EARDRUM

  3. INCUS OVAL WINDOW STAPES TYMPANIC CAVITY TYMPANIC MEMBRANE a.k.a the EARDRUM

  4. VESTIBULE UTRICLE SACCULE SEMICIRCULAR DUCTS COCHLEA

  5. VESTIBULAR MEMBRANE SCALA VESTIBULI COCHLEAR DUCT TECTORIAL MEMBRANE BASILAR MEMBRANE SCALA TYMPANI ORGAN OF CORTI

  6. equivalent- p. 473 TECTORIAL MEMBRANE BASILAR MEMBRANE

  7. Last Plate Sequence of events involved in hearing. Sound waves are funneled by the auricle into the external auditory meatus. 1. The sound waves strike the tympanic membrane, causing it to vibrate. 2. 3. Vibrations of the tympanic membrane are amplified as they pass through the malleus, incus, and stapes. 4. The vestibular window (oval window) is pushed back and forth by the stapes. 5. Vibrations of the vestibular window set up pressure waves in the perilymph of the cochlea. 6. The pressure waves area propagated through the scalavestibuli and the scala tympani to the endolymph contained within the cochlear duct. 7. Stimulation of the hair cells within the spiral organ of the cochlea causes the generation of nerve impulses in the cochlear nerve (a portion of the vestibular[eighth cranial] nerve), which pass into the pons of the brain. Theor y and Pr oblems of Human Anatomy & Physiology , K.M. V an De Graaf and R.W . Rhees, McGraw-Hill, 1997 The EAR(Part 1 of 2)

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