Final Exam Study Guide - Part 1 of 3 Flashcards
Handicap
The possible adverse impact associate with auditory impairment and disability. “Participation Restriction”
The _______________ lies on top of the basilar membrane, is comprised of sensory reception organs/hair cells for hearing.
Organ of Corti
The 8th CN exits the bony labyrinth via the _________
Internal auditory meautus
The Basilar membrane
- separates the scala media from the scala tympani.
- extends almost the entire length of the cochlea and supports the organ of Corti.
- floor of cochlear duct.
The ___________ is responsible for transduction of sound pressure variation to electrochemical/neural impulses..
The inner ear (inner hair cells)
The scala tympani terminates laterally near the ME cavity at the _______ window.
Round.
The Central Auditory nervous system begins at the ________
brainstem
The sensory receptor cells for hearing are located in the _______.
Scala Media
The basilar membrane is ________ at the base than the apex.
narrower and stiffer
Inner hair cells:
- 1 row
- pear shaped
- u shaped sterocilia
- primary transducer of mech. to EC. energy.
The ____________ is a small opening allowing passage for perilymph from the scala vestibuli to the scala tympani.
Helicotrema
The sterocilia of the outer hair cells are imbedded in the underside of the _________________.
Tectorial membrane.
The tympanic membrane is held in position at the end of the external auditory canal by a ring of tissue called the _________.
Tympanic annulus
The middle ear muscle that contracts in order to reduce the amplitude of vibration of a sound and which is innervated by a branch of the 8th CN (Facial) is the ______ muscle.
Stapedius
The portion of tympanic membrane which contains only two layers, the epidermal/lateral and mucous membrane/medial layers is called the __________
Pars flaccida
The _________ forms most of the Tympanic Membrane.
pars tensa
Fluid in the membranous labyrinth is called_________.
Endolymph
___________ lines the outer wall of the cochlear duct and is responsible for manufacturing endolymph.
stria vascularis
Air pressure to mechanical pressure is:
Transmission
_________ refers to abnormal or reduced function.
Hearing impairment.
Pathology
The disorder of an organ, such as the inner ear.
The mode of function in the inner ear includes
mechanical
hydrodynamics
electrochemical action.
The center point of the eardrum where it attaches to the malleus and forms the tip of a conical shape is called ________.
Umbo
The 25dB “recapture” of sound energy that is lost as it is transmitted from air to fluid is attributed to the middle ear system’s _________.
areal ratio
The ______ is the central core of bone around which the cochlea turns for 2 3/4 turns.
modiolus
The roof of the cochlear duct is formed by _________
Reissner’s membrane
____________ is made up by a collection of cell bodies for the first order auditory neuron and occupy space within the modiolus.
spiral ganglion
The tensor tympani muscle is innervated by a branch of the _____ and contracts in order to reduce the amplitude of vibration of a loud sound.
trigeminal nerve (CN5)
_________ frequency sounds cause stimulation of hair cells in the apical turn of the cochlea.
Low
