Abstract：
UNASSIGNED: To elucidate the induced effects of horizontal strabismus on the Bielschowsky Head Tilt Test (BHTT).
UNASSIGNED: Prospective clinical study.
UNASSIGNED: Prospective analysis of BHTT testing in 85 patients with exotropia and 71 patients with esotropia who were examined in a strabismus clinic.
UNASSIGNED: Eighty-four of 85 patients with exotropia (98.82%) showed a positive BHTT with an induced hyperdeviation on the side of the tilt (to both sides in 67% and to one side in 32%). Fifty-seven of 71 patients with esotropia (80.2%) showed a positive BHTT with an induced hypodeviation on the side of the tilt (to both sides in 57.7% and to one side in 22.5%). These induced vertical deviations were greater in patients with larger horizontal deviations and in those with constant rather than intermittent deviations; however, they were not influenced by the presence or absence of associated primary oblique muscle overaction.
UNASSIGNED: Exotropia and esotropia produce hyperdeviations during BHTT testing, with a hyperdeviation on the side of the tilt observed in patients with exotropia, and hypotropia on the side of the tilt observed in patients with esotropia. These diametrical results are not attributable to any preexistent alteration of neurologic output inherent to these two forms of horizontal strabismus or to associated torsion. Rather, they arise directly from the altered anatomical positions of the two eyes, which cause the eyes to approximate their visual axes more closely to the vertical rectus muscles (in exotropia) and the oblique muscles (in esotropia), enabling the vertical actions of specific cyclovertical muscles to predominate in response to altered utricular output generated by the BHTT.
UNASSIGNED: Prospective clinical study.
UNASSIGNED: Prospective analysis of BHTT testing in 85 patients with exotropia and 71 patients with esotropia who were examined in a strabismus clinic.
UNASSIGNED: Eighty-four of 85 patients with exotropia (98.82%) showed a positive BHTT with an induced hyperdeviation on the side of the tilt (to both sides in 67% and to one side in 32%). Fifty-seven of 71 patients with esotropia (80.2%) showed a positive BHTT with an induced hypodeviation on the side of the tilt (to both sides in 57.7% and to one side in 22.5%). These induced vertical deviations were greater in patients with larger horizontal deviations and in those with constant rather than intermittent deviations; however, they were not influenced by the presence or absence of associated primary oblique muscle overaction.
UNASSIGNED: Exotropia and esotropia produce hyperdeviations during BHTT testing, with a hyperdeviation on the side of the tilt observed in patients with exotropia, and hypotropia on the side of the tilt observed in patients with esotropia. These diametrical results are not attributable to any preexistent alteration of neurologic output inherent to these two forms of horizontal strabismus or to associated torsion. Rather, they arise directly from the altered anatomical positions of the two eyes, which cause the eyes to approximate their visual axes more closely to the vertical rectus muscles (in exotropia) and the oblique muscles (in esotropia), enabling the vertical actions of specific cyclovertical muscles to predominate in response to altered utricular output generated by the BHTT.
摘要：
■阐明水平斜视对Bielschowsky头部倾斜测试（BHTT）的诱导作用。
■前瞻性临床研究。
■在斜视诊所检查的85例外斜视患者和71例内斜视患者的BHTT测试的前瞻性分析。
■85例外斜视患者中的84例（98.82％）显示出阳性的BHTT，并在倾斜的一侧引起了高度偏离（67％的两侧和32％的一侧）。71例内斜视患者中的57例（80.2％）显示出BHTT阳性，并在倾斜的一侧（两侧为57.7％，一侧为22.5％）。这些诱发的垂直偏差在水平偏差较大的患者和那些具有恒定而不是间歇性偏差的患者中更大；但是，他们不受是否存在相关的原发性斜肌过度活动的影响.
■外斜视和内斜视在BHTT测试期间产生超偏差，在外斜视患者中观察到倾斜的一侧存在过度偏差，在内斜视患者中观察到倾斜的一侧和下斜视。这些径向结果不能归因于这两种形式的水平斜视或相关的扭转固有的神经输出的任何先前存在的改变。相反，它们直接来自两只眼睛的解剖位置的改变，导致眼睛的视轴更接近垂直直肌（外斜视）和斜肌（内斜视），响应BHTT产生的改变，使特定的回旋垂直肌肉的垂直动作占主导地位。
■前瞻性临床研究。
■在斜视诊所检查的85例外斜视患者和71例内斜视患者的BHTT测试的前瞻性分析。
■85例外斜视患者中的84例（98.82％）显示出阳性的BHTT，并在倾斜的一侧引起了高度偏离（67％的两侧和32％的一侧）。71例内斜视患者中的57例（80.2％）显示出BHTT阳性，并在倾斜的一侧（两侧为57.7％，一侧为22.5％）。这些诱发的垂直偏差在水平偏差较大的患者和那些具有恒定而不是间歇性偏差的患者中更大；但是，他们不受是否存在相关的原发性斜肌过度活动的影响.
■外斜视和内斜视在BHTT测试期间产生超偏差，在外斜视患者中观察到倾斜的一侧存在过度偏差，在内斜视患者中观察到倾斜的一侧和下斜视。这些径向结果不能归因于这两种形式的水平斜视或相关的扭转固有的神经输出的任何先前存在的改变。相反，它们直接来自两只眼睛的解剖位置的改变，导致眼睛的视轴更接近垂直直肌（外斜视）和斜肌（内斜视），响应BHTT产生的改变，使特定的回旋垂直肌肉的垂直动作占主导地位。
