Otic capsule | definition of otic capsule by Medical dictionary
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the cartilage capsule surrounding the internal ear mechanism; in elasmobranchs, it remains cartilaginous in the adult; in the embryos of higher vertebrates, it is cartilaginous at first but later becomes bony (at approximately 23 weeks in humans).
o·tic cap·sule (ō'tik kap'sŭl)
The cartilage that, in the embryo, surrounds the developing otic vesicle and develops into the bony labyrinth of the internal ear.
Synonym(s): auditory capsule
The cartilaginous capsule that develops in the embryonic skull to enclose the ear.
pertaining to the ear; aural.
cartilaginous envelope which surrounds the nervous elements of the embryo's inner ear, and which subsequently ossifies.
the invagination of the otic placode, destined to form an otic vesicle and ultimately the inner ear.
References in periodicals archive
Otospongiosis affects the bone of the otic capsule
and is a classic example of a cause of MHL.
Basis for understanding otic capsule
bony dyscrasias [letter].
Also about the ninth week, the laterohyale fuses to the otic capsule
to form part of the anterior wall of the fallopian canal and the pyramidal eminence.
Ultrathin-section computed tomography of the temporal bones demonstrated evidence consistent with otosclerosis of the otic capsule
, more so on the left.
The sensory capsules--that is, the elements of neural crest tissue that surround the sense organs--are arrayed from anterior to posterior along the tripartite brain in this order: nasal capsule, optic capsule, and otic capsule
Previous reports have described cholesteatoma extension through the middle fossa plate and into the middle cranial fossa, but to our knowledge ours is the first report of a case in which the sac herniated into the temporal lobe and overlying dura from a site far lateral to the otic capsule