Otolaryngologia polska. The Polish otolaryngology
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Diffusion tensor imaging is unique in its ability to non-invasively visualize white matter fiber tracts in the human brain in vivo. White matter fiber bundles of the human brain form a spatial defined by the anatomical and functional architecture. Determination of axonal pathways provides an invaluable means to study the connectivity of human brain and its functional network. ⋯ The authors indicate diagnostic possibilities of MR tractography in otolaryngology for imaging the nervous tracts of sense of hearing, smell and taste with particular consideration of otoneurological evaluation of patients with cochlear implants and bone anchored hearing aid (BAHA). White matter tracts can be evaluated independently by using diffusion tensor tractography, which appears to be a promising technique for determining changes in white matter in degenerative disease. The authors also indicate that method as a beneficial in the surgical planning for patients with intrinsic brain tumors.
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The aim of the study was to assess the influence of glucocorticoids on the view of hair cell regeneration process being in the chicken's inner ear (basilar papilla - BP) after exposure to wide-band noise at the level 120 dB (A) for 48 hours. We found that glucocorticoids given during and/or after exposure to the noise have a cytoprotective activity to the hair cells, they limitate the extensiveness and decrease the dynamics of hair cells injury. We observed that new "young" hair cells reappeared at the sensory epithelium on the 7th day after the end of exposure. Regenerated hair cells have immature, short and thick cilia and small apical surface area.
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The aim of the study was to assess the influence of hyperbaric oxygen on regeneration processes which take place in the inner ear (basilar papilla - BP) of chicken after exposure to wide-band noise at the level 120 dB for 48 hours. We found, that hyperbaric oxygen applied once a day after exposure to the noise restricted he extensiveness and decreased the dynamics of hair cells injury. Quantative and qualitive differences in histological changes which take place in chick basilar papilla after exposure to hyperbaric oxygen and glucocorticoids may prove the presence of different their effectory points of acting.