hearing and equilibrium. auditory sensations and equilibrium hearing and equilibrium rely on...
Post on 20-Dec-2015
221 views
TRANSCRIPT
![Page 1: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/1.jpg)
Hearing and Equilibrium
![Page 2: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/2.jpg)
Auditory sensations and Equilibrium
Hearing and equilibrium rely on mechanoreceptors
The ear is divided into three parts:Outer ear Middle ear Inner ear
![Page 3: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/3.jpg)
![Page 4: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/4.jpg)
Outer ear:
Ceruminous glands – Cerumen - ear wax
in external auditory meatus
Middle ear:
Tympanic antrum – opening into mastoid process
Auditory (Eustachian) Tube
Otitis media – inflammation of the MIDDLE ear
Auditory ossicles or ear bones
![Page 5: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/5.jpg)
![Page 6: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/6.jpg)
![Page 7: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/7.jpg)
Tensor tympani muscle
Stapedius muscle
Tympanic reflex
INNER EAR :
Cochlea – hearing
Vestibule – static equilibrium
Semicircular canals – dynamic equilibrium
![Page 8: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/8.jpg)
![Page 9: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/9.jpg)
![Page 10: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/10.jpg)
![Page 11: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/11.jpg)
![Page 12: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/12.jpg)
![Page 13: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/13.jpg)
![Page 14: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/14.jpg)
![Page 15: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/15.jpg)
![Page 16: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/16.jpg)
![Page 17: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/17.jpg)
Organ of Corti
Vestibulocochlear nerve – cranial nerve VIII
Audible range: 20 -- 20,000 hertz
Ossicles amplify sound 22 X
Some nerve fibers cross over to opposite side of brain; some don’t. Why?
![Page 18: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/18.jpg)
Equilibrium – Balance
Static equilibrium – maintenance of body posture relative to gravity while the body is still.
Dynamic equilibrium – maintenance of the body posture (mainly the head) in response to sudden movements. Tracking a moving object.
![Page 19: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/19.jpg)
Static Equilibrium
Inside the vestibule are two chambers :
utricle and saccule.
Regions of hair cells and supporting cells called maculae.
Otoliths – “ear rocks”
![Page 20: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/20.jpg)
![Page 21: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/21.jpg)
![Page 22: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/22.jpg)
Dynamic Equilibrium
Semicircular canals
In ampulla is the crista ampullaris – contains hair cells and supporting cells covered by a gelatinous mass called the cupula.
Neurological connections between eyes and semicircular canals – for tracking
Nystagmus
![Page 23: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/23.jpg)
![Page 24: Hearing and Equilibrium. Auditory sensations and Equilibrium Hearing and equilibrium rely on mechanoreceptors The ear is divided into three parts: Outer](https://reader030.vdocuments.mx/reader030/viewer/2022032800/56649d4c5503460f94a299a2/html5/thumbnails/24.jpg)