Kodama A, Sando I
Ann Otol Rhinol Laryngol Suppl. 1982 Jul-Aug;96:3-12.
The purpose of this study was to gain basic information about the postnatal development of the vestibular aqueduct (VA) and the endolymphatic sac (ES). For this study, serial horizontal sections of 31 normal temporal bones of individuals whose ages ranged from 0 to 13 years were used. Medial view graphic reconstruction of the VA and rugose portion (RP) of the ES was performed in every case for analysis of the VA and RP. The findings of this study revealed the following new information about the postnatal development of the VA and ES. 1) The VA and RP undergo significant growth postnatally up to age 3 years. 2) In the newborn, individual variations in the VA and RP already exist and at age 3 years significantly wide individual variations which can be classified into three groups (hypoplastic, normoplastic, hyperplastic) may be recognized. 3) Hypoplastic VAs are of two types: one is fairly elongated and tubelike while the other is short and funnel-shaped. The tubelike VA seems to be the prenatal form. 4) The changes that occur with development postnatally in the area of the VA are more closely related to the changes that occur in the length of the external aperture of the VA than they are to the changes that occur in the length of the VA. 5) Development of the area of the VA is closely correlated with development of the area of the RP.
本研究的目的是获取有关前庭导水管（VA）和内淋巴囊（ES）出生后发育的基础信息。在本研究中，使用了31例年龄从0岁到13岁的正常颞骨的连续水平切片。对每例标本进行VA和ES皱襞部分（RP）的内侧视图图形重建，以分析VA和RP。本研究结果揭示了以下有关VA和ES出生后发育的新信息。1）VA和RP在出生后至3岁时经历显著生长。2）在新生儿中，VA和RP已经存在个体差异，在3岁时可识别出明显广泛的个体差异，可分为三组（发育不全型、正常发育型、增生型）。3）发育不全型VA有两种类型：一种相当细长呈管状，另一种短而呈漏斗状。管状VA似乎是产前形式。4）VA区域出生后随发育发生的变化与VA外口长度的变化比与VA长度的变化更密切相关。5）VA区域的发育与RP区域的发育密切相关。
