scholarly journals THE ROLE OF RIGHT HEMISPHERE IN RECOVERY OF POST-STROKE APHASIA

2016 ◽  
Vol 15 (2) ◽  
pp. 66-68
Author(s):  
Adriana Elena Nica ◽  
◽  
Daniel Alexa ◽  
Octavian Andronic ◽  
Tabita Cazac ◽  
...  
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Positive Influence ◽  
Post Stroke ◽  
Language And Communication ◽  
The Right ◽  
Aphasia Recovery

Previous data obtained especially from rTMS studies indicate that right hemisphere recruitment has a limiting effect on recovery of poststroke aphasia in right handed patients by inhibiting the activation of intact perilesional areas in left hemisphere and preventing them from regaining function. New researches bring new arguments to support the positive influence of right hemisphere on restoration of language and communication. In this paper we try to review the latest evidences regarding the contribution of the right hemisphere to post-stroke aphasia recovery.

scholarly journals The Role Of Neuroplasticity Types In Aphasia Recovery And Its Influencing Factors: A Systematic Review Of Literature

2017 ◽  
pp. 42
Author(s):  
Alireza Aghaz
Keyword(s):  
Systematic Review ◽  
Influencing Factors ◽  
Left Hemisphere ◽  
Speech Therapy ◽  
Right Hemisphere ◽  
Pubmed Database ◽  
Surrounding Areas ◽  
The Right ◽  
Aphasia Recovery

Background and Objectives: aphasia is common consequence of stroke. Most people with aphasia in the acute phase show some degree of spontaneous recovery, most of which occurs during the first two to three months. Neuro-linguistic mechanisms of recovery in aphasia remain a lot unknown still, but considerably depends to the amount of change plasticity in brain of patients after stroke. The aim of this article is review of the role of Neuroplasticity types in aphasia recovery and its influencing factors: a systematic review of literatureMethods: this study is a review of all articles listed in PubMed database from January 1990 to September, 2016 that were identified using the keywords Neuroplasticity and aphasia (in titles) and language.Results: Three types of changes in the activity of the nervous system after a stroke, is closely linked with aphasia recovery: 1. Reactivation of damaged areas of the left hemisphere or activities it`s surrounding in language tasks 2. Acquisition or manifest of the ability to process language in the nondominant right Hemisphere 3. The wrong activity of nondominant right hemisphere that can prevent language improvement.Discussion and Conclusion: Most of studies have shown involvement of surrounding areas in the left hemisphere lesion in language improvement, others reported employment of the right hemisphere regions and some others have known useful the involvement of both hemispheres in language improvement. It is difficult, aphasia improvement prediction due to the interaction of various factors. The most promising results aphasia treatment for the reorganization of the brain, caused by speech therapy that lead to quick improvements considerably.  

scholarly journals The Role Of Neuroplasticity Types In Aphasia Recovery And Its Influencing Factors: A Systematic Review Of Literature

2017 ◽  
pp. 76
Author(s):  
Alireza Aghaz
Keyword(s):  
Systematic Review ◽  
Influencing Factors ◽  
Left Hemisphere ◽  
Speech Therapy ◽  
Right Hemisphere ◽  
Pubmed Database ◽  
Surrounding Areas ◽  
The Right ◽  
Aphasia Recovery

Background and Objectives: Aphasia is common consequence of stroke. Most people with aphasia in the acute phase show some degree of spontaneous recovery, most of which occurs during the first two to three months. Neuro-linguistic mechanisms of recovery in aphasia remain a lot unknown still, but considerably depends to the amount of change plasticity in brain of patients after stroke. The aim of this article is review of the role of Neuroplasticity types in aphasia recovery and its influencing factors: a systematic review of literatureMethods: This study is a review of all articles listed in PubMed database from January 1990 to September, 2016 that were identified using the keywords Neuroplasticity and aphasia (in titles) and language.Results: Three types of changes in the activity of the nervous system after a stroke, is closely linked with aphasia recovery: 1. Reactivation of damaged areas of the left hemisphere or activities it`s surrounding in language tasks 2. Acquisition or manifest of the ability to process language in the nondominant right Hemisphere 3. The wrong activity of nondominant right hemisphere that can prevent language improvement.Discussion and Conclusion: Most of studies have shown involvement of surrounding areas in the left hemisphere lesion in language improvement, others reported employment of the right hemisphere regions and some others have known useful the involvement of both hemispheres in language improvement. It is difficult, aphasia improvement prediction due to the interaction of various factors. The most promising results aphasia treatment for the reorganization of the brain, caused by speech therapy that lead to quick improvements considerably. 

The Role of Cognitive and Hemispheric Processing Styles in L2 Learning

1989 ◽  
Vol 85-86 ◽  
pp. 105-121
Author(s):  
Cem Alptekin
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Hemispheric Processing ◽  
Processing Styles ◽  
Field Independent ◽  
Educational Implications ◽  
L2 Learners ◽  
Analytic Processing ◽  
The Right

L2 learners fall into two major categories in terms of their cognitive styles. The first group comprises the relatively analytical individuals, who are said to be predominantly field independent. The second group, on the other hand, embodies the relatively holistic persons, who are said to be chiefly field dependent. L2 learners are further classified in terms of their hemispheric processing styles. Some learners are left-hemisphere dominant while others are right-hemisphere dominant. The former are thought to be more efficient with analytic processing in which the left hemisphere specializes. By contrast, the latter are described as more efficient with holistic processing in which the right hemisphere specializes. After reviewing the available evidence for the associations between cognitive and hemispheric processing styles, the paper discusses the educational implications of L2 learners' differences with respect to cognitive and hemispheric dimensions.

Phrase comprehension after brain damage

1982 ◽  
Vol 3 (3) ◽  
pp. 263-278 ◽  
Author(s):  
Rita Sloan Berndt ◽  
Alfonso Caramazza
Keyword(s):  
Brain Damage ◽  
Left Hemisphere ◽  
Language Comprehension ◽  
Right Hemisphere ◽  
The Other ◽  
Right Hemisphere Damage ◽  
Dimensional Adjectives ◽  
Neurologically Normal ◽  
The Right

ABSTRACTComprehension of six dimensional adjectives was found to be intact in groups of left hemisphere-damaged, right hemisphere-damaged and neurologically normal patients. Phrases with those adjectives were interpreted quite differently by left hemisphere-damaged patients than by the other two groups, and a subgroup of left-damaged patients appeared to be responsible for that group's deviant responses to phrases such as slightly bigger. All patients in the left-damaged group had some difficulty with negative phrases such as not big, however. Patients with right hemisphere-damage had difficulty interpreting only negative phrases with small. Results are interpreted with reference to Luria's discussion of semantic aphasia, and with regard to recent findings concerning the role of the right hemisphere in language comprehension.

scholarly journals Transcranial brain stimulation (TMS and tDCS) for post-stroke aphasia rehabilitation: Controversies

2014 ◽  
Vol 8 (3) ◽  
pp. 207-215 ◽  
Author(s):  
Lucia Iracema Zanotto de Mendonça
Keyword(s):  
Left Hemisphere ◽  
Brain Stimulation ◽  
Right Hemisphere ◽  
Post Stroke ◽  
Transcranial Brain Stimulation ◽  
The Right ◽  
Dominance Pattern ◽  
Causal Event ◽  
Hemispheric Language Dominance ◽  
Language Network

Transcranial brain stimulation (TS) techniques have been investigated for use in the rehabilitation of post-stroke aphasia. According to previous reports, functional recovery by the left hemisphere improves recovery from aphasia, when compared with right hemisphere participation. TS has been applied to stimulate the activity of the left hemisphere or to inhibit homotopic areas in the right hemisphere. Various factors can interfere with the brain's response to TS, including the size and location of the lesion, the time elapsed since the causal event, and individual differences in the hemispheric language dominance pattern. The following questions are discussed in the present article: [a] Is inhibition of the right hemisphere truly beneficial?; [b] Is the transference of the language network to the left hemisphere truly desirable in all patients?; [c] Is the use of TS during the post-stroke subacute phase truly appropriate? Different patterns of neuroplasticity must occur in post-stroke aphasia.

Memory Processes and Gestural Performance in Apraxia

1993 ◽  
Vol 10 (4) ◽  
pp. 293-311 ◽  
Author(s):  
Eric A. Roy ◽  
Liana Brown ◽  
Tammi Winchester ◽  
Paula Square ◽  
Craig Hall ◽  
...  
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Special Populations ◽  
Complex Nature ◽  
Special Population ◽  
Cognitive Neuropsychology ◽  
Memory Processes ◽  
Motor Processes ◽  
The Right

Apraxia is an impairment in the ability to pantomime or imitate gestures usually caused by a stroke more frequently to the left than the right hemisphere. Due to the complex nature of apraxia, disruptions to a number of different cognitive and motor processes have been proposed to underly this disorder. In order to examine disruptions to these processes the participation of a special population of people who have suffered a stroke has been enlisted. The role of memory has been particularly well elucidated in studies of this special population, as patients with left hemisphere damage exhibit a particular deficit in performing gestures from memory. In this paper, through use of a model depicting the stages involved in gestural production, the processes that might be affected at each stage by left hemisphere damage are examined. The implications of the “cognitive neuropsychology” approach for incorporating special populations into research in the movement sciences are considered.

Lateralised semantic and indirect semantic priming effects in people with schizophrenia

1998 ◽  
Vol 172 (2) ◽  
pp. 142-146 ◽  
Author(s):  
Matthias Weisbrod ◽  
Sabine Maier ◽  
Sabine Harig ◽  
Ulrike Himmelsbach ◽  
Manfred Spitzer
Keyword(s):  
Left Hemisphere ◽  
Semantic Priming ◽  
Language Processing ◽  
Semantic Processing ◽  
Right Hemisphere ◽  
Contextual Information ◽  
Striking Difference ◽  
Semantic Associations ◽  
The Right

BackgroundIn schizophrenia, disturbances in the development of physiological hemisphere asymmetry are assumed to play a pathogenetic role. The most striking difference between hemispheres is in language processing. The left hemisphere is superior in the use of syntactic or semantic information, whereas the right hemisphere uses contextual information more effectively.MethodUsing psycholinguistic experimental techniques, semantic associations were examined in 38 control subjects, 24 non-thought-disordered and 16 thought-disordered people with schizophrenia, for both hemispheres separately.ResultsDirect semantic priming did not differ between the hemispheres in any of the groups. Only thought-disordered people showed significant indirect semantic priming in the left hemisphere.ConclusionsThe results support: (a) a prominent role of the right hemisphere for remote associations; (b) enhanced spreading of semantic associations in thought-disordered subjects; and (c) disorganisation of the functional asymmetry of semantic processing in thought-disordered subjects.

scholarly journals Handedness Does Not Impact Inhibitory Control, but Movement Execution and Reactive Inhibition Are More under a Left-Hemisphere Control

Symmetry ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1602
Author(s):  
Christian Mancini ◽  
Giovanni Mirabella
Keyword(s):  
Left Hemisphere ◽  
Inhibitory Control ◽  
Right Hemisphere ◽  
Dominant Role ◽  
Hemispheric Specialization ◽  
Arm Movement ◽  
Proactive Inhibition ◽  
Stop Signal Task ◽  
The Right

The relationship between handedness, laterality, and inhibitory control is a valuable benchmark for testing the hypothesis of the right-hemispheric specialization of inhibition. According to this theory, and given that to stop a limb movement, it is sufficient to alter the activity of the contralateral hemisphere, then suppressing a left arm movement should be faster than suppressing a right-arm movement. This is because, in the latter case, inhibitory commands produced in the right hemisphere should be sent to the other hemisphere. Further, as lateralization of cognitive functions in left-handers is less pronounced than in right-handers, in the former, the inhibitory control should rely on both hemispheres. We tested these predictions on a medium-large sample of left- and right-handers (n = 52). Each participant completed two sessions of the reaching versions of the stop-signal task, one using the right arm and one using the left arm. We found that reactive and proactive inhibition do not differ according to handedness. However, we found a significant advantage of the right versus the left arm in canceling movements outright. By contrast, there were no differences in proactive inhibition. As we also found that participants performed movements faster with the right than with the left arm, we interpret our results in light of the dominant role of the left hemisphere in some aspects of motor control.

scholarly journals The role of neurotransmitter systems separate the hemispheres of the brain in action the new antiepileptic compounds AGB-31

2013 ◽  
Vol 11 (2) ◽  
pp. 31-35
Author(s):  
Oleg Aleksandrovich Yarosh
Keyword(s):  
Nitric Oxide ◽  
Left Hemisphere ◽  
Glutamic Acid Decarboxylase ◽  
Right Hemisphere ◽  
Reduced Glutathione ◽  
Acid Decarboxylase ◽  
Decarboxylase Activity ◽  
The Right ◽  
The Brain

Compound AGB-31, a monocarbamate derivative, is shown to possess a high antiepileptic activity. The mechanisms of antiepileptic action are connected with significant increase in glutamic acid decarboxylase activity in the left hemisphere of the brain, with trend of the glutamate content decrease in the left hemisphere and the tendency to increase GABA in both hemispheres. AGB-31 significantly (more than 3-fold) increases syntase nitric oxide activity in the left hemisphere and has a tendency to reduce the NO content in both hemispheres. AGB-31 significantly (by 63.4%), reduced glutathione peroxydase activity in the right hemisphere without changing it in the left, with a tendency to increase the activity of glutathione reductase in both hemispheres.

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