National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Separation of hippocampal function in Morris water maze and in active place avoidance by alternance protocol
Vojtěchová, Iveta ; Petrásek, Tomáš (advisor) ; Hiadlovská, Zuzana (referee)
In this work, we examined the executive functions of the hippocampus at the behavioral level as a so-called behavioral separation in adult rats. We studied an impact of day-to-day alternation versus sequential learning (and the order of learning) of two spatial tasks (Morris Water Maze and Active Allothetic Place Avoidance) testing different hippocampal functions (experiment 1), or an impact of sequential versus alternating learning of one task (Active Allothetic Place Avoidance) in two different rooms (experiment 2), on performance. We found out that rats are able to learn both tasks as well as to discriminate between the two contexts regardless of the order or alternating of learning. Because such executive functions are impaired in human patients suffering from schizophrenia, we used this procedure also in the rat model of schizophrenia induced by acute intraperitoneal application of dizocilpine (MK-801), glutamate NMDA receptors antagonist, in the dose of 0.08 mg/kg. We failed to selectively disrupt the behavioral separation, however, we observed general learning deficit and hyperlocomotion regardless of the alternation in the Active Allothetic Place Avoidance task in these rats. The cognitive impairments in connection with learning after such low dose of MK-801 in this task have not yet been...
Inhibitors of axonal regeneration and their importance for neuroplasticity, behaviour and memory
Vojtěchová, Iveta ; Petrásek, Tomáš (advisor) ; Hock, Miroslav (referee)
The central nervous system of higher vertebrates, in contrast to the peripheral one, doesn't regenerate. That is because of the presence of many growth inhibitors produced by a glial scar and oligodendrocytes; the most important inhibitors are MAG (myelin-associated glycoprotein), OMgp (oligodendrocyte-myelin glycoprotein) and mainly Nogo protein. Nogo-A is one of three isoforms of the Nogo protein located primarily in the brain and the spinal cord where it causes the degradation of growth cones, inhibits the growth of neurites, restricts the neuroplasticity and prevents the regeneration of injured axons in adulthood. The Nogo receptor complex serves for a reception of signals and the following signal cascade causes the destabilisation of actin filaments. There are also other receptors for Nogo-A, e. g. the PirB receptor. During the development, Nogo-A is highly expressed by neurons but in adulthood, the main producers are oligodendrocytes. It is noteworthy, that neuronal expression of Nogo-A doesn't decrease after birth in structures with high plasticity, e. g. in the hippocampus which is important especially for spatial learning and memory. In the hippocampus, Nogo-A keeps a balance between the synaptic plasticity and stability and restricts the long-term potentiation. Therefore, this bachelor's thesis...
Personnel marketing
The aim of this thesis is the analysis of the human resources and personnel work in the area of personnel marketing, which is followed by proposals for changes and recommendations to improve the management of this area in a particular organization. The work focuses mainly on attracting workers, remuneration, employee benefits, training, development, and their retirement. South Bohemian Regional Authority was chosen as the analyzed object for my thesis titled Personal marketing.

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1 Vojtěchová, Ivana
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