Ossicular connections

Slides:



Advertisements
Similar presentations
ANATOMY AND PHYSIOLOGY OF THE EAR
Advertisements

CSD 3103 anatomy of speech and hearing mechanisms Hearing mechanisms Fall 2008 The Middle Ear.
CHAPTER 9- Auditory System
The external ear funnels sound waves to the external auditory meatus The external ear funnels sound waves to the external auditory meatus.tsound.
Kaan Yücel MD,PhD
Anatomy and Physiology of Speech and Hearing Mechanism
S 319 < Auditory system >
Anatomy and physiology of the middle ear
Middle ear.
Understanding and Interpreting Acoustic Reflexes
Special Sensory Reception
The Ear.
Tympanic Membrane.
Anatomy Physiology Disorders Middle Ear. The big picture Eustachian tube Mastoid Tympanic cavity Ossicles Anatomy.
Hearing Anatomy.
ANATOMY AND PHYSIOLOGY OF THE EAR
CHAPTER 6 Outer and Middle Ears.
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings  Hearing – allows us to detect and interpret sound waves  Equilibrium – inform.
EAR. Outer Ear Auricle: Auricle: Layer of skin over cartilage framework. Lobule = fibrous fatty tissue with no cartilage. Sensory innervation: Sensory.
The Outer Ear Consists of:
The Lever Ratio. Purpose of ME To transmit sound energy from the air space in the EAC to the fluid in the cochlea This is accomplished by vibration of.
52 The Sense of Hearing Dr. A.R. Jamshidi Fard 2011.
Physiology Middle ear space stiffness dominated: High- frequency emphasis.
Anatomy and Physiology of the Ear
Head and Neck Dr. SREEKANTH THOTA DEPARTMENT OF ANATOMY.
Anatomy of the Ear Three Main Sections
Basic Fact of EAR  Ears are used to detect SOUND in environment.  Ears help to detect movement & position.  Ear is divided into Outer Ear, Middle Ear.
ANATOMY AND PHYSIOLOGY OF THE EAR Yard.Doc.Dr.Müzeyyen Doğan.
Sense of Hearing and Equilibrium
Middle Ear Tympanic Cavity Tympanic Membrane Ossicles
Ear and the hearing process.
Lab 11 : Human Ear Anatomy Biology Department.
ANATOMY THE EAR Dr. J.K. GERALD, (MD, MSc.).
Which cranial nerves are associated with hearing?
Physics of hearing.
ANATOMY AND PHYSIOLOGY OF THE EAR
Ear Anatomy.
Physiology of Vision & Hearing for Dental Students Lecture Copy
Anatomy of the Ear Chapter 8.
Figure 4-1. The three functional subdivisions of the auditory system
Notes 21.3: The Ear.
Otic; Vestibular; Auditory
Special Senses The Ear.
Senses: Hearing and Equilibrium
Auditory.
The Ears and Hearing.
Section 14.3 Hearing and Equilibrium
Anatomy of the Ear Parts of the Ear.
Figure 4-1. The three functional subdivisions of the auditory system
Neurology of The Ear.
Journal#5: What would happen if you were born without cones
Special Senses: The Ear
ANATOMY AND PHYSIOLOGY OF THE EAR (HEARING)
Hearing Prof. K. Sivapalan.
Figure 25.1 Anatomy of the ear.
The Ears: Hearing and Balance
The Ear Hearing and Balance.
Lab Ex. 32 The Ear & Hearing By Michael J. Harman 
Cochlea Hearing.
Anatomy of the Ear.
The Senses – The Ear.
Middle ear.
The Special Senses Hearing
Anatomy of the Ear Parts of the Ear Minimum time needed 12 minutes.
Hearing Prof. K. Sivapalan.
ANATOMY AND PHYSIOLOGY OF THE EAR
1/17/19 Open your notes to page 18. I will be checking for a summary on this page(s) Also be ready to flip to pages 20 and 22. I will be checking for.
Ear Today Gone Tomorrow
The ear.
STUCTURE and FUNCTION OF EAR, NOSE, AND TONGUE
Presentation transcript:

Ossicular connections Malleus: Manubrium of malleus connects to umbo of TM. Incus: Head of malleus connects to body of incus (incudo-mallear joint) Stapes: Inferior process of incus connects to form lenticular process, which connects to the stapes (incudo-stapedial joint) Footplate of the stapes connects to the oval window

Ossicular connections, cont’d. Suspended in the middle ear cavity by axial ligaments Posterior ligaments of incus Anterior ligaments of malleus Middle ear muscles Tensor tympani: Connected to manubrium of the malleus Activated by the trigeminal nerve Stapedial muscle: Connected to the head of the stapes Activated by the facial nerve

Functions of the middle ear Effective sound transmission to inner ear Shields the round window from direct air pressure variations Protective function: Acoustic reflex http://www.neurophys.wisc.edu/animations/

Possible methods of sound transmission into inner ear Bone conduction: Through bones of the skull Air in the middle ear cavity Through the ossicles: Most effective

Nature of middle ear cavity Not a completely closed cavity Necessary for efficient ossicular chain movement Opening through the eustachian tube Pressure equalization