OBJECTIVE Validation of a bedside test to measure the monocular and binocular subjective visual vertical (SVV). METHODS Monocular and binocular measurements of the SVV were made in 30 healthy subjects (mean age 46.1 +/- 16.4 years) and 30 patients with acute peripheral or central vestibular lesions (mean age 51.3 +/- 17.1 years). The established method uses a hemispheric dome (adjustment of a...

OBJECTIVES To validate the effectiveness of the original standards of True Vertical (TV) Subnasal Line in orthognatic surgery planning. The present study evaluates the changes occurring in patients with skeletal Class II alterations programmed for orthognathic surgery with a view to improving their facial profile. STUDY DESIGN [corrected] We showed a series of black profiles (composed by a fi...

BACKGROUND There is common belief among some medical researchers that if a potential surrogate endpoint is highly correlated with a true endpoint, then a positive (or negative) difference in potential surrogate endpoints between randomization groups would imply a positive (or negative) difference in unobserved true endpoints between randomization groups. We investigate this belief when the pote...

Sun observations provide a robust way for determining the geodetic or true azimuth at a location. Azimuth is generally defined as the angle in the plane measured from the meridian’s north (or south) to the location of the line of interest. It is common to use the north azimuth; also referred to as “azimuth”, especially in civilian surveying applications. The astronomic meridian is obtained thro...

CONCLUSION The 'bucket test' may indicate that patients with known vestibular disorders have spatial orientation deficits but due to the low receiver operating characteristics (ROC) values it is not useful for screening people for vestibular impairments. OBJECTIVES 1) to verify that patients with unilateral peripheral vestibular weakness (UW) differ from normal subjects on the bucket test, 2)...

Tactical trainees, like those entering the police force, are required to undergo vigorous training as part of their occupational preparation. This training has the potential to cause injuries. In addition, the physical training, communal living and pressures of tactical training are known to induce immune suppression and have the potential to increase the risk of illness. The aim of this study ...

background: malocclusion, as a worldwide issue, can cause a lot of problems for patients. panoramic (pr) and lateral cephalometric (lcr) radiographs are both usually indicated for orthodontic treatments. the aim of this study was to analyze vertical and sagittal parameters of both jaws on prs and to compare them on lcrs. materials and methods: in this cross sectional study, 61 samples from all ...

statement of problem: few longitudinal studies have evaluated the reproducibility of natural head position (nhp) with more than six months follow-up. purpose: the present investigation was conducted to estimate the reproducibility of nhp in adult cases after three years. materials and methods: this descriptive study was performed on 27 volunteer dental students, 19-29 years of age. one radiogra...

We measured the ability to fuse dichoptic images of a horizontal line alone or in the presence of a textured background with different vertical disparity. Nonius-line measurements of vertical vergence were also obtained. Diplopia thresholds and vertical vergence gains were much higher in response to an isolated vertically disparate line than to one with a zero vertical-disparity background. The...