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Chapter 8 Group 8
106-120
15
Anatomy
11th Grade
01/09/2012

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Term
CUPULA
Definition
A GELATINOUS CAP THAT COVERS HAIR CELLS IN THE INNER EAR.
Term
AMPULLA
Definition
A SWOLLEN REGION AT THE BASE OF EACH MEMBRANOUS SEMICIRCULAR CANAL OF THE EAR.
Term
SPIRAL ORGAN OF CORTI
Definition
LOCATED IN THE COCHLEAR DUCT; CONTAINS THE HEARING RECEPTORS (HAIR CELLS)
Term
COCHLEAR DUCT
Definition
THE COCHLEA IS THE AUDITORY PORTION OF THE INNER EAR. IT IS A SPIRAL-SHAPED CAVITY IN THE BONY LABYRINTH, MAKING 2.5 TURNS AROUND ITS AXIS, THE MODIOLUS.
Term
COCHLEAR NERVE
Definition
A DIVISION OF THE CRANIAL NERVE VIII (THE VESTIBULOR COCHLEAR NERVE) THAT HAIR CELLS TRANSMIT IMPULSES ALONG TO THE AUDITORY CORTEX IN THE TEMPORAL LOBE, WHERE INTERPRETATION OF SOUND (HEARING) OCCURS.
Term
DEAFNESS
Definition
HEARING LOSS OF ANY DEGREE
Term
CONDUCTION DEAFNESS
Definition
COULD BE CAUSED BY EARWAX BUILDUP OR FUSIONOF THE OSSICLES; RESULTS WHEN SOMETHING INTERFERES WITH THE CONDUCTION OF SOUND VIBRATION TO THE FLUIDS IN THE EAR.
Term
OTOSCLEROSIS
Definition
FUSSION OF THE OSSICLES
Term
BASILAR MEMBRANE
Definition
THE BASILAR MEMBRANE WITHIN THE COCHLEA OF THE INNER EAR IS A STIFF STRUCTURAL ELEMENT THAT SEPARATES TWO LIQUID-FILLED TUBES THAT RUN ALONG THE COIL OF THE COCHLEA, THE SCALA MEDIA, AND THE SCALA TYMPANI. 
Term
TECTORIAL MEMBRANE
Definition
A JELLY-LIKE MEMBRANE COVERING THE ORGAN OF CORTI IN THE EAR. A STRONG SHEET OF CONNECTIVE TISSUE RUNNING FROM THE BASILAR PART OF THE OCCIPITAL BONE TO THE DORSAL SURFACE OF THE BODIES OF THE AXIS AND THIRD CERVICAL VERTEBRA.

Term

 

SENSORINEURAL DEAFNESS

 

Definition
A PROBLEM OF THE NERVOUS SYSTEM STRUCTURES THAT OCCUR WHEN THERE IS A DEGENERATION OR DAMAGE TO THE RECEPTOR CELLS IN THE SPINAL ORGAN OF THE CORTI, TO THE COCHLEA NERVE OR TO NEURONS OF THE AUDITORY CORTEX.
Term
OTITIS MEDIA
Definition
AN EAR INFECTION THAT IS MOST OFTEN A BACTERIAL OR VIRAL INFECTION THAT AFFECTS THE MIDDLE EAR, THE AIR-FILLED SPACE BEHIND THE EARDRUM THAT CONTAINS THE TINY VIBRATING BONES OF THE EAR. CHILDREN ARE MORE LIKELY THAN ADULTS TO GET EAR INFECTIONS. 
Term
MENIERE'S SYNDROME
Definition
PROGRESSIVE DEAFNESS; SUSPECTED CAUSES ARE ARTERIOSCLEROSIS, DEGENERATION OF CRANIAL NERVE VIII AND INCREASED PRESSURE OF THE INNER EAR FLUIDS.
Term
VERTIGO
Definition
A SENSATION OF SPINNING; CAN'T STAND UP WITHOUT EXTREME DISCOMFORT.
Term
CHEMORECEPTORS
Definition
RECEPTORS FOR TASTE AND OLFACTION
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