Publications by authors named "Georgiev C"

Video presentation has become ubiquitous in paradigms investigating the neural and behavioral responses to observed actions. In spite of the great interest in uncovering the processing of observed bodily movements and actions in neuroscience and cognitive science, at present, no standardized set of video stimuli for action observation research in neuroimaging settings exists. To facilitate future action observation research, we developed an open-access database of 135 high-definition videos of a male actor performing object-oriented actions.

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While the simultaneous degradation of muscle composition and postural stability in aging are independently highly investigated due to their association with fall risk, the interplay between the two has received little attention. Thus, the purpose of this study is to explore how age-related changes in muscle composition relate to postural stability. To that aim, we collected posturography measures and ultrasound images of the dominant Vastus Lateralis and Biceps Brachii from 32 young (18-35 year old) and 34 older (65-85 year old) participants.

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We present the findings of a Whole Exome Sequencing in a 2-year-old boy, conceived via Fertilization with donor sperm, who suffers from an undiagnosed neurological syndrome. The following heterozygous variant in the gene was identified and classified as likely pathogenic: c.1655_1656, p.

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Voluntary motor control is thought to be predicated on the ability to efficiently integrate and process somatosensory afferent information. However, current approaches in the field of motor control have not factored in objective markers of how the brain tracks incoming somatosensory information. Here, we asked whether motor performance relates to such markers obtained with an analysis of the coupling between peripheral kinematics and cortical oscillations during continuous movements, best known as corticokinematic coherence (CKC).

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At present, brain tumours remain one of the "hard-to-treat" malignancies with minimal improvement in patients' survival. Recently, miRNAs have been shown to correlate with oncogenesis and metastasis and have been investigated as potential biomarkers for diagnosis, prognosis and therapy prediction in different brain malignancies. The aim of the current study was to select an accurate and affordable brain tumour detection and grading approach.

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Many neuropeptides, like angiotensins and vasopressin, are involved in the regulation of urinary bladder contractile activity. They activate the inositol-triphosphate signal pathway and increase intracellular calcium concentration. To determine the effect of ghrelin and extracellular calcium on the amplitude and force of angiotensin and vasopressin-mediated contractions of detrusor, we used strips from urinary bladder of Wistar rats.

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For the first time in the bulgarian literature a case with pancreatic oncocytoma is described, initially diagnosed as carcinoma. The patient survived for 13 years being nowadays in perfect condition.

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Mucinous breast carcinomas, denominated also gelatinous, mucoid and colloid (collomas), represent a heterogeneous group of neoplasms. More than half of them exhibit signs of neuroendocrine differentiation. Eighteen mucus producing carcinomas of the breast are subjected to morphological study.

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A case of a 36-year-old man with pancreatic somatostatinoma is reported. Such cases are very rare. The following signs were found; quick ESR, increased alpha 2- and beta-globulins, shortened Weltmann's coagulation band, increased serum bilirubin level, especially of the conjugated fraction, enzyme constellation of cholestasis and moderate liver cytolysis.

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Adenoma recurrences were established in 24 (9.7%) of 247 patients with operated pituitary adenomas; 7 of them were with chromophobic non-secreting adenomas, 9 patients with acromegaly, 5 female and 3 male patients were with prolactinomas. Transcranial operations were performed on patients with large-size tumors and transsphenoidal ones on patients with small-size adenomas.

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Various methods for therapy of Icenko-Cushing's disease: radiotherapeutic, surgical and medicinal were evaluated. A total of 184 patients were treated. The authors have been of opinion that therapeutic methods depended on function of the neuroendocrine system and adrenal cortex, e.

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A typical pancreatic insulinoma is characterized by immunohistochemistry which reflects its histogenesis, morphology and hormonal activity.

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