《基础医学各论2》资料：2感觉器官

The sense of the different frequency sound??Traveling wave theoryTravel of the Vibration Waves??Pattern of vibration of the basilar membrane for different sound frequencies??Low-frequency sound??Medium-frequency sound??High-frequency sound2010/3/511Hearing Abnormalities??Types of deafness??Nerve deafness??Impairment of the auditory nerve??Impairment of the cochlea??Conduction deafnessCategory of Hearing LossMild Hearing LossMildHiL(26 ~ 40 dB)Moderate Hearing Loss (41~ 55 dB)Moderately Severe Hearing Loss(56 ~ 70 dB)Severe Hearing Loss(71~ 90 dB)Profound Hearing Loss (Over 90 dB)2010/3/512??Treatment of deafnessTreatmentofdeafness??Audiphone??Artificial cochleaVideo Review2010/3/513Part 4. Vestibular Apparatus Structure of vestibular apparatus ??Utricle, saccule, semicircular canals2010/3/514Functions of the Vestibular apparatus??The vestibular system detects changes in the motion and position of the head by the use of fluid-filled diifhhdbhfflidfilldtubes.??To provide a subjective sensation of movement and position in 3-dimensional space and spatial memory ??To maintain upright body posture by reflex mechanism??To remain the eyes fixed on the same point in spite of changes in head position Receptor Cells in Semicircular duct2010/3/515