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18 Cards in this Set
- Front
- Back
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The basilar membrane extends from the __________ ___ of the OSL to the __________ _________ of the spiral ligament.
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tympanic lip
basilar crest |
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The basilar membrane forms a ________ layer that serves as a footing for the spiral _______ or ________ __ _______.
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fibrous
organ organ of corti |
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The portion closest to the spiral lamina is ______ and _______ and is known as the ______ __________ or ______ _______.
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thin
fragile zona arcuata pars tecta |
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The tympanic surface of the basilar membrane is covered by a layer of ____________ through which courses __________ __________. The largest of these vessels is the ____ ___________.
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mesothelium
vascular tissue vas spirale |
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The portion of the basilar membrane closest to the spiral laminae is the ___________ fragile part called the ________ _______ and the thicker more ________ part is toward the outside wall (spiral ligament) and is called the ___________ _________. (comb-like)
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innermost
arcuate zone rigid pectinate portion |
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The pectinate region consists of how many fibrous layers?
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2
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The basilar membrane has a _____ layer of __________ ________. On top of that there is a layer of __________ __________ that are ____________ to the axis of the __________ _______. There are _________ of these fibers.
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base
connective tissue transverse fibers perpendicular cochlear duct 24,000 |
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The underneath side of the basilar membrane (facing the scala tympani) is the _________ _________ for the basilar membrane. Right in the center, running the length of the basilar membrane is the ____ _________.
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vascular covering
vas spirale |
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Weaver in _______ reported the width of the basilar membrane's base to be ___ mm and at the apex ___ mm.
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1938
.08 .50 |
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Keith in ______ reported the base at ___mm and at the apex ___mm.
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1918
.16 .52 |
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The basilar membrane has its greatest width at the ______ and least width at the _____.
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apex
base |
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The basilar membrane is ____ stretched - there is ___ ________. __________ experiment showed this. It has a __________ ratio from one end to the other of ____ to ____. The stiffest end is at the _____ and the least is at the _____.
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not
no tension stiffness 100 1 base apex |
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The spiral lamina (spiral plate) is a very _______ shelf of _____ at the ______ end of the cochlear duct, becoming gradually wider toward the _______ end.
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narrow
bone apical basal |
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The sprial lamina consists of ___ plates of ______, between which are ______ for the ____________ of the ___________ fibers of the auditory nerve.
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2
bones canals transmission peripheral |
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The upper layer of bone is _____________ with a thickening of ___________ known as the ________ ___________.
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continuous
periosteum spiral limbus |
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The spiral limbus is markedly ________ at its _________ edge forming the ________ ______ _______ and at the same time, giving rise to an upper __________ called the ___________ ____, and a lower extremity called the ___________ ______.
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concave
outer internal sprial sulcus extremity vestibular lip tympanic lip |
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The vestibular lip has a _________ appearance referred to as __________ teeth.
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serrated
auditory |
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What is the opening and it follows that lower boney portion (the tympanic lip)?
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perforate habenula
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