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Neurochemistry of Attention
Different neurotransmitters systems are implicated in attention. Cholinergic, dopaminergic and serotonergic systems play major roles in neurochemical machinery of attention.
Acetylcholine: More than any other neurotransmitter, acetylcholine has been implicated in attentional processes. Blockage of Muscarinic receptors by a drug scopolamine (antagonist) results in impaired performance on a number of task measuring sustained attention. On the other hand Nicotine (agonist) administration improves task performance on the measures of sustained attention. Lesions of the basal forebrain cholinergic system result in impaired attentional function in rats and monkeys. Therefore it seems that increased level of acetylcholine is important for sustained attention.
Q. How can you describe Pleural Effusion? Fluid has a density indistinguishable from soft tissue on a radiograph. Pleural fluid tends to accumulate in the deepest part of the
Explain Triangular Full Mucoperiosteal Flaps - Endodontic Surgery - Only vertical releasing incision with the Horizontal incision, -Used at the area of important anatom
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Criteria of Essentiality Amon and Stout as early as 1939, suggested certain criteria that an element must fulfil in order to be classified as essential. These criteria are lis
Can the heat capacity of water be considered small or large? What is the biological significance of that characteristic? From thermology it is called that the quantity of exch
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how pollination occurs in Salvia?
Illustrate the tear flow direction of drainage. Tear Drainage: Tear are drained by the combined action of gravity, capillary action and lid movements (Lacrimal pump)
entamoeba histolyca and Giardia lambia were isolated
Nucleosides : compounds formed from a nitrogenousbase and a penstose sugar.
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