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290904 occurrences (No.84 in the rank) during 5 years in the PubMed. [no cache] 500 found

246) The inter-relation of cortical excitability and reduced interhemispheric inhibition provides direct multi-modal evidence for the disinhibition theory of the contralesional hemisphere following stroke.

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PMID:24415059 DOI:10.1007/s00429-013-0702-8

2015 Brain structure & function

* Motor cortex excitability and connectivity in chronic stroke: a multimodal model of functional reorganization.

- Cerebral ischemia triggers a cascade of cellular processes, which induce neuroprotection, inflammation, apoptosis and regeneration. At the neural network level, lesions concomitantly induce cerebral plasticity. Yet, many stroke survivors are left with a permanent motor deficit, and only little is known about the neurobiological factors that determine functional outcome after stroke. Transcranial magnetic stimulation (TMS) and magnetic resonance imaging (MRI) are non-invasive approaches that allow insights into the functional (re-) organization of the cortical motor system. We here combined neuronavigated TMS, MRI and analyses of connectivity to investigate to which degree recovery of hand function depends on corticospinal tract (CST) damage and biomarkers of cerebral plasticity like cortical excitability and motor network effective connectivity. As expected, individual motor performance of 12 stroke patients with persistent motor deficits was found to depend upon the degree of CST damage but also motor cortex excitability and interhemispheric connectivity. In addition, the data revealed a strong correlation between reduced ipsilesional motor cortex excitability and reduced interhemispheric inhibition in severely impaired patients. Interindividual differences in ipsilesional motor cortex excitability were stronger related to the motor deficit than abnormal interhemispheric connectivity or CST damage. Multivariate linear regression analysis combining the three factors accounted for more than 80 % of the variance in functional impairment. The inter-relation of cortical excitability and reduced interhemispheric inhibition provides direct multi-modal evidence for the disinhibition theory of the contralesional hemisphere following stroke. Finally, our data reveal a key mechanism (i.e., the excitability-related reduction in interhemispheric inhibition) accounting for the rehabilitative potential of novel therapeutic approaches which aim at modulating cortical excitability in stroke patients.

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(1)66 the	(12)4 activity	(24)2 among	(35)2 interhemispheric
(2)30 in	(13)4 both	(25)2 availability	(36)2 it
(3)23 by	(14)4 cell	(26)2 blood	(37)2 likelihood
(4)13 null	(16)3 ability	(27)2 but	(38)2 number
(5)13 to	(17)3 after	(28)2 compared	(39)2 rates
(6)10 glutathione	(18)3 binding	(29)2 effortful	(40)2 stem
(7)8 and	(19)3 or	(30)2 ejection	(41)2 total
(8)8 expression	(20)3 risk	(31)2 following	(42)2 tumor
(9)5 levels	(21)3 sensitivity	(32)2 from	(43)2 which
(10)5 significantly	(22)2 (P	(33)2 glutathione,
(11)4 PGE2	(23)2 BRCA-1	(34)2 hippocampal

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--- WordNet output for reduced --- =>貧しい暮らし, 落ちぶれた生活 Overview of verb reduce The verb reduce has 20 senses (first 11 from tagged texts) 1. (102) reduce, cut down, cut back, trim, trim down, trim back, cut, bring down -- (cut down on; make a reduction in; "reduce your daily fat intake"; "The employer wants to cut back health benefits") 2. (9) reduce -- (make less complex; "reduce a problem to a single question") 3. (5) reduce -- (bring to humbler or weaker state or condition; "He reduced the population to slavery") 4. (3) reduce -- (simplify the form of a mathematical equation of expression by substituting one term for another) 5. (3) reduce -- (lower in grade or rank or force somebody into an undignified situation; "She reduced her niece to a servant") 6. (3) reduce, come down, boil down -- (be the essential element; "The proposal boils down to a compromise") 7. (2) shrink, reduce -- (reduce in size; reduce physically; "Hot water will shrink the sweater"; "Can you shrink this image?") 8. (1) reduce -- (lessen and make more modest; "reduce one's standard of living") 9. (1) reduce, scale down -- (make smaller; "reduce an image") 10. (1) deoxidize, deoxidise, reduce -- (to remove oxygen from a compound, or cause to react with hydrogen or form a hydride, or to undergo an increase in the number of electrons) 11. (1) reduce, tighten -- (narrow or limit; "reduce the influx of foreigners") 12. repress, quash, keep down, subdue, subjugate, reduce -- (put down by force or intimidation; "The government quashes any attempt of an uprising"; "China keeps down her dissidents very efficiently"; "The rich landowners subjugated the peasants working the land") 13. reduce -- (undergo meiosis; "The cells reduce") 14. reduce -- (reposition (a broken bone after surgery) back to its normal site) 15. reduce -- (destress and thus weaken a sound when pronouncing it) 16. abridge, foreshorten, abbreviate, shorten, cut, contract, reduce -- (reduce in scope while retaining essential elements; "The manuscript must be shortened") 17. boil down, reduce, decoct, concentrate -- (be cooked until very little liquid is left; "The sauce should reduce to one cup") 18. reduce, boil down, concentrate -- (cook until very little liquid is left; "The cook reduced the sauce by boiling it for a long time") 19. dilute, thin, thin out, reduce, cut -- (lessen the strength or flavor of a solution or mixture; "cut bourbon") 20. reduce, melt off, lose weight, slim, slenderize, thin, slim down -- (take off weight) Overview of adj reduced The adj reduced has 2 senses (first 2 from tagged texts) 1. (6) decreased, reduced -- (made less in size or amount or degree) 2. (1) reduced, rock-bottom -- (well below normal (especially in price)) --- WordNet end ---