Pressure-volume relationships in the right atrium were examined before and after the creation of acute experimental tricuspid regurgitation in pigs. A 1.3 kHz multielectrode impedance catheter with a measuring current of 4 mA was used to determine instantaneous right atrial pressure and relative blood volume; right atrial dimension was assessed simultaneously with ultrasonic crystals attached t...

OBJECTIVE To use the amplitude of low-frequency fluctuation (ALFF) technique to investigate the local features of spontaneous brain activity in optic neuritis (ON) and their relationship with behavioral performance. MATERIALS AND METHODS Twelve patients with ON (four male, eight female) and twelve age-, sex-, and education status-matched healthy controls (HCs) (four male, eight female) underw...

In the present chapter we shall deal with the birth of the theory of Gestalt, and particularly with the essay “On ‘Gestalt Qualities’” by Christian von Ehrenfels, published in 1890. It will become clear in the course of this chapter that the Gestalt psychologists of the Berlin school, above all Max Wertheimer, Wolfgang Köhler and Kurt Koffka, were part of a wider Gestalt tradition whose roots l...

We employed fMRI to index neural activity in prefrontal cortex during tests of recognition and source memory. At study, subjects were presented with words displayed either to the left or right of fixation, and, depending on the side, performed one of two orienting tasks. The test phase consisted of a sequence of three 10-word blocks, displayed in central vision. For one block, subjects performe...

introduction: emotional words in comparison with neutral words have different hemispheric specialization. it is assumed that the right hemisphere has a role in processing every kind of emotional word. the objective of the present study was the development of a persian version of the dichotic emotional word test and evaluate its validation among adult persian speakers.   materials and methods: t...

background and aims. inferior alveolar nerve block injection is one of the common intra oral anesthetic techniques, with a failure rate of 15-20%. the aim of this study was to evaluate the position of the lingula as an index for this injection. materials and methods. thirty eight panoramic radiographs of 7–11 year old patients were analyzed and the distance between the lingula index and occlusa...

background: the therapeutic administration of 131i for thyroid remnant ablation and for metastases comes up with some adverse effects. this study was conducted to investigate whether single high dose radioiodine therapy affects lacrimal gland functions or not. materials and methods: seventy-eight eyes of 39 patients, who were diagnosed as differentiated thyroid carcinoma, were objectively teste...