3.04 Functions and disorders of the ear 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system Essential Questions What are the functions of the sensory system? What are some disorders of the sensory system? How are sensory system disorders treated? How do you relate the body’s communication to the sensory system? 3.04 Understand the functions and disorders of the sensory system
Understanding the functions of the ear: Hearing 3.04 Understand the functions and disorders of the sensory system
Understanding the functions of the ear External ear Pinna: conducts sound External auditory canal Ear canal Contains cerumen Tympanic membrane: separates the outer and middle ear 3.04 Understand the functions and disorders of the sensory system
Understanding the functions of the ear Middle ear Ossicles: name transmits sound from ear drum to inner ear Eustachian tube: equalizes pressure 3.04 Understand the functions and disorders of the sensory system
Understanding the functions of the ear Inner ear Cochlea: organ for hearing, Organ of Corti: delicte hairlike structures that pick up vibrations of fluid transmit them as sensory impulse Semicircular canals:3 structures that contains liquid set in motion with movement of head and body. Helps maintain equilibrium 3.04 Understand the functions and disorders of the sensory system
Understanding the functions of the ear Pathway of hearing Trace the pathway of hearing. Discuss the process of hearing. What are decibels? 3.04 Understand the functions and disorders of the sensory system
Review the pathway of hearing Understanding the functions of the ear What is occurring at each structure? Review the pathway of hearing 3.04 Understand the functions and disorders of the sensory system
Healthy Hearing How do you protect your hearing? What is the relevance to healthy hearing? 3.04 Understand the functions and disorders of the sensory system
Understanding the functions of the ear Sound Activity What is a sound byte? Short bit of sound or clip from a longer recording. 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system Disorders of the ear 3.04 Understand the functions and disorders of the sensory system
Disorders of the ear What instruments are used to examine the ear? What specialist studies the ears, nose, and throat? 3.04 Understand the functions and disorders of the sensory system
Disorders of the ear External otitis Discuss what you see in this picture? (Besides a Q-tip!) What causes external otitis? How can it be prevented? 3.04 Understand the functions and disorders of the sensory system
Disorders of the ear Otitis media What is otitis media? Who is most at risk of having otitis media? Why? What are the treatment options? Normal tympanic membrane Otitis media Myringotomy 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system Perforated Eardrum 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system What instrument would a physician use to examine the inner ear? 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system Disorders of the ear Otosclerosis What is it? Oto- sclerosis What causes it? Why is a stapedectomy useful in treating otosclerosis? 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system The bone stapes of the middle ear become sponge and then harden. The stapes becomes fixed and immovable. Inherited disorder Stapedectomy is total replacement of the stapes 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system Disorders of the ear Meniere’s disease What are the symptoms of Meniere’s disease? What causes these symptoms? How is it treated? 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system Affects the semicircular canals of the inner ear Marked vertigo, nausea, vomiting, tinnitus Bedrest, medication to relieve vertigo and nausea Avoid salt, caffeine and nicotine, balanced diet, fluids 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system Disorders of the ear Tinnitus What is tinnitus? Explain this statement: Tinnitus is a symptom, not a disorder. 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system “Ringing in the ears” The microscopic hairs are bent or broken and in a constant state of irritation which are interpreted by the auditory neurons and the brain as a” ringing” Most likely cause is loud noise, impacted wax, otitis media or salicylate use 3.04 Understand the functions and disorders of the sensory system
Disorders of the ear Presbycusis What is presbycusis? Who is most likely to develop presbycusis? What is the difference between conductive hearing loss and sensory hearing loss? How can they be treated? 3.04 Understand the functions and disorders of the sensory system
Testing for hearing loss Rinne test Weber test Compare these two tests. How are they diagnostic? 3.04 Understand the functions and disorders of the sensory system
3.04 Understand the functions and disorders of the sensory system Essential Questions What are the functions of the sensory system? What are some disorders of the sensory system? How are sensory system disorders treated? How do you relate the body’s communication to the sensory system? 3.04 Understand the functions and disorders of the sensory system
3.04 Functions and disorders of the ear The End 3.04 Understand the functions and disorders of the sensory system