The horizontal network in visual cortex layer 2/3 is implicated in numerous psychophysical and physiological properties. To investigate the spatial and temporal distribution of excitation and inhibition evoked by this network, we used voltage-sensitive dyes to image the responses to focal electrical stimulation in tangential slices of ferret visual cortex layer 2/3. The resulting optical patter...

Introduction: Since Curcuma longa extract and curcumin have been shown to be potent antioxidant agents, they were used in cultured adult mouse spinal cord slices to investigate whether they can inhibit apoptosis in motor neurons. Methods: Slices from the thoracic region of adult mice spinal cord were divided into four groups: 1. Freshlyprepared slices (time 0) 2. Control 3. Slices treated by cu...

Cell migration plays an important role during the development of the retina. In this work we have studied the migration of newborn horizontal cells in avian embryonic retina. Using the pattern of the early expressed transcription factors Lim1 and Prox1 we have shown that horizontal cells migrate bi-directionally from their site of birth, close to the ventricular side, to the adjacent (vitreal) ...

AIM Isolated papillary muscles and enzymatically dissociated myocytes of guinea-pig hearts are routinely used for experimental cardiac research. The aim of our study is to investigate adult mammalian ventricular slices as an alternative preparation. METHOD Vibratome cut ventricular slices (350 microm thick) were examined histologically and with 2-photon microscopy for fibre orientation. Intra...

Contents List of Tables viii List of Figures ix Abstract xi 1 Introduction 1Each pixel shows the computation work of a scanline. Scanlines for a slice progress from left to right on the horizontal axis. Slices of a frame are top to bottom on the vertical axis.. 2.13 Ray intersections with volume (a) Viewing plane is aligned with the XY plane (b) Viewing plane is at an angle from the XY

We report the implementation of a system for displaying three-dimensional anima-tions based on holoprojection. It is based in the holoprojection of two-dimensional slices (produced by a modiied ray tracing program) of three-dimensional scenes. The nal display is a truly spatial three-dimensional image with continuos horizontal parallax. It makes use of the holographic screen, a special diiracti...

We present a preliminary investigation of compression of segmented 3D seismic volumes for the rendering purposes. Promising results are obtained on the base of 3D discrete cosine transforms followed by the SPIHT coding scheme. An accelerated version of the algorithm combines 1D discrete cosine transform in vertical direction with the 2D wavelet transform of horizontal slices. In this case the S...

objective(s):protective effects of diuretics, particularly of hydrochlorothiazide (hct), for the development of seizure attacksepilepsy have been described in vivo. however, itsthe mechanism of action of hct is unknownneeds to be elucidated. materials and methods: extracellular field potentials were recorded from the ca1- and ca3-subfields of the hippocampus of rats. epileptiform discharges wer...