The caloric stimulus: temperature generation within the temporal bone.
The caloric stimulus: temperature generation within the temporal bone.
复制标题
热量刺激：颞骨内产生温度。
DOI：
10.3109/00016488709107793
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发表时间：
1987
影响因子：
1.4
通讯作者：
G. O'neill
中科院分区：
文献类型：
--
作者：
G. O'neill
温度测量是在离体尸体颞骨上进行的，并对外腹进行热灌洗。这是为了阐明热刺激颞骨的热传递途径。平均而言，外侧半规管产生的最大温度变化为0.47°C，发生在30-s灌溉开始后74 s。中耳沟空气温度变化约1.5°C，表明自然对流过程中热量传递显著。相比之下，切除连接外耳和内耳的骨脊对外侧半规管产生的温度几乎没有影响。因此，我们认为中耳裂内的自然对流在前庭迷路的热刺激中起着重要的作用。这一观点得到了外耳和外侧半规管外侧肢体之间缺乏直接牢固连接的观察的支持。
Temperature measurements were performed on isolated cadaveric temporal bones subjected to caloric irrigation of the external meatus. This was undertaken in an attempt to clarify the pathways of heat transfer involved in thermal stimulation of the temporal bone. On average, the maximum temperature change produced across the lateral semicircular canal was 0.47°C, occurring 74 s after the start of the 30-s irrigation. Temperature changes of approximately 1.5°C were found to occur in the air of the middle ear cleft, indicating significant heat transfer by the process of natural convection. By comparison, removal of the bony ridge joining the external meatus with the inner ear had little effect on the temperature generated across the lateral semicircular canal. It is therefore considered that natural convection within the middle ear cleft plays an important role in caloric stimulation of the vestibular labyrinth. This view is supported by the observation that there is a lack of a direct solid connection between the outer ear and lateral limb of the lateral semicircular canal.