When a target travels slowly and smoothly along the line of sight of one eye, the eye that is aligned with the target remains stationary while the other eye adducts. The mechanism that is commonly invoked is that commands signaling conjugate pursuit and symmetrical vergence are combined. The two signals are in the same direction in the adducting eye but are in the opposite direction in the stat...

BACKGROUND One of the most effective ways for distal movement of molars to treat Class II malocclusion is using extraoral force through a headgear device. The purpose of this study was the comparison of stress distribution in maxillary first molar periodontium using straight pull headgear in vertical and horizontal tubes through finite element method. MATERIALS AND METHODS Based on the real g...

a 40-day-old male holstein breed calf with a complaint of inability of moving the tongue in and out aswell as difficulties with breastfeeding was referred to the veterinary clinic. a notch in the middle of thetongue tip was evident during oral examination. in addition, a thin tissue band between the ventral surface of the tongue and floor of the oral cavity was seen in the calf. a diagnosis of ...

Abstract Background Diving marine predators forage in a three-dimensional environment, adjusting their horizontal and vertical movement behaviour response to environmental conditions the spatial distribution of prey. Expectations regarding horizontal-vertical movements are derived from optimal foraging theories, however, inconsistent empirical findings across range taxa suggests these behaviour...

It was predicted that due to the optical distortion produced.by wearing a facemask, the constancy of visual position would not be maintained under water, i. e., stationary objects should appear to move when the head is moved. Subjects made magnitude estimates of object movement in both air and water. Twice as much movement occurred in water as in air. Two underwater activities, head rotation wh...