XCIII. The Cause of Otosclerosis

Guggenheim, Louis K.

doi:10.1177/000348943204100417

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1933

1983

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“…The function, if any, of the fissula ante fenestram is obscure. It is a structure unique to man, although some authors consider it to be a rudimentary analogue of the ductus fenestra ovalis of the frog (Guggenheim, 1932) or of a diverticulum of the anterior vestibule found in hyenas and antelopes (Siebenmann, 1890). Shambaugh(1967) reports seeing a rudimentary fissula in a rhesus monkey.…”

Section: Discussionmentioning

confidence: 99%

Patent fissula ante fenestram

1983

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Section: Discussionmentioning

confidence: 99%

Patent fissula ante fenestram

1983

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Development of the Otic Capsule: Ii. The Origin, Development and Significance of the Fissula Ante Fenestram and Its Relation to Otosclerotic Foci

Bast¹

1933

Archives of Otolaryngology - Head and Neck Surgery

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The fissula ante fenestram is an irregular projection of the periotic connective tissue extending from the angle of junction of the vestibule and the scala vestibuli, through the otic bony capsule to the periosteum of the middle ear just below the pulley of the tensor tympani muscle. Little significance has been attached to this structure. The common view held by former authors is that it is a synchondrosis or possibly a place for expansion of the otic capsule. However, further studies have shown that this structure is constant in human otic capsules even into old age; that the capsule in this region is the usual locus or otosclerotic foci; that the tissue of the fissula resembles and is continuous with the loose periotic tissue of the vestibule at its junction with the scala vestibuli, and that the fissula becomes apparent and its character definite in the same manner and at the same time that the periotic tissue differentiates from the precartilage. These facts lead one to question whether the fissula ante fenestram can be dismissed by simply considering it a synchondrosis. The purpose of this paper is to present developmental and anatomic data regarding this structure which indicate that it has a significance other than that which was formerly attributed to it.

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XCIII. The Cause of Otosclerosis

Cited by 2 publications

References 4 publications

Patent fissula ante fenestram

Patent fissula ante fenestram

Development of the Otic Capsule: Ii. The Origin, Development and Significance of the Fissula Ante Fenestram and Its Relation to Otosclerotic Foci

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