Previous research indicated that 4-month-old infants perceive continuity of objects moving on horizontal trajectories but appear to have difficulty processing occlusion events involving oblique trajectories. However, because perception of continuity of vertical trajectories has not been tested, it is uncertain whether this indicates a specific deficit for oblique trajectories or a specific adva...

We systematically analyse the binocular disparity field under various eye, head and stimulus positions and orientations. From the literature we know that certain classes of disparity which involve the entire disparity field (such as those caused by horizontal lateral shift, differential rotation, horizontal scale and horizontal shear between the entire half-images of a stereogram) lead to relat...

This qualitative study aims to better understand the perceptions of puerperal women regarding their experiences in vertical and horizontal deliveries and identify positive and negative aspects of each position. Semi-structured interviews were carried out with ten puerperal women hospitalized in the rooming-in unit of a teaching hospital. After thematic analysis - Collective Subject Discourse - ...

BACKGROUND Voluntary nystagmus has been recognized as a pendular, rapid, conjugate, primarily horizontal, benign eye movement initiated and maintained by voluntary effort. CASE A 10-year-old Japanese girl presented with voluntary nystagmus associated with accommodation spasms. Her chief complaints, intermittent blurred vision, headache, and soreness of the eyes, were thought to be related to ...

Existing laparoscopic box trainers consist only of static tasks and do not adequately prepare surgeons to navigate the dynamic surgical environment. This paper describes an innovative design using controlled motorized target movements to enhance the training of dynamic motor skills. The prototype was tested using 15 subjects with different surgical experience levels. The task required accurate ...

IMPORTANCE We report a new syndrome, which we are calling head-jolting nystagmus, that expands the differential diagnosis of head movement-induced paroxysmal vertigo. OBSERVATIONS Two male patients (65 and 58 years old) described rotational vertigo after violent and brief (1- to 2-second) oscillations of the head (head jolting) that triggered intense horizontal nystagmus lasting 45 seconds. A...

The extraction of ore and minerals by underground mining may induce ground subsidence phenomena. These phenomena produce several types of ground movement like horizontal and vertical displacements, ground curvature and horizontal ground strain at the surface, and associated building damage in urban regions. The influence function is a well-known and efficient method for the prediction of these ...

Vertical and horizontal head movements (universally associated with nodding and shaking, respectively) have frequently been demonstrated to affect cognitive processes. Two experiments were conducted to test the hypothesis that overt head movements can influence memory for valenced images. In the first experiment, participants were instructed to perform either vertical or horizontal head movemen...