Aphasia Following Right Hemisphere Lesion in a Woman with Left Hemisphere Injury in Childhood

1995 ◽  
Vol 49 (3) ◽  
pp. 280-288 ◽  
Author(s):  
M. Guerreiro ◽  
A. Castrocaldas ◽  
I.P. Martins
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Hemisphere Lesion

Evidence for Development of Distinction of Voice Onset Time in a Child with Left-Hemisphere Lesion

1995 ◽  
Vol 81 (3) ◽  
pp. 1001-1002
Author(s):  
Kelly Paulson-Sebold ◽  
Ludie R. Hansen ◽  
J. Anthony Seikel ◽  
Patricia M. Hargrove ◽  
Gail D. Chermak
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Voice Onset Time ◽  
Onset Time ◽  
Language Function ◽  
Partial Removal ◽  
Hemisphere Lesion ◽  
The Right

Following surgery for partial removal of the posterior left hemisphere at 5 mo., voice onset time was assessed to 9; 11 yr. Left-hemisphere language function associated with voicing appeared subsumed by the right hemisphere.

scholarly journals Effects of Direction and Index of Difficulty on Aiming Movements after Stroke

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
Paola Ribeiro Coqueiro ◽  
Sandra Maria Sbeghen Ferreira de Freitas ◽  
Cassandra Mendes Assunção e Silva ◽  
Sandra Regina Alouche
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Movement Execution ◽  
Task Constraints ◽  
Aiming Movements ◽  
Brain Hemispheres ◽  
Hemisphere Lesion ◽  
Index Of Difficulty ◽  
And Gender ◽  
Left Hemisphere Stroke

Background.Brain hemispheres play different roles in the control of aiming movements that are impaired after unilateral stroke. It is not clear whether those roles are influenced by the direction and the difficulty of the task.Objective.To evaluate the influence of direction and index of difficulty (ID) of the task on performance of ipsilesional aiming movements after unilateral stroke.Methods.Ten individuals with right hemisphere stroke, ten with left hemisphere stroke, and ten age- and gender-matched controls performed the aiming movements on a digitizing tablet as fast as possible. Stroke individuals used their ipsilesional arm. The direction (ipsilateral or contralateral), size (0.8 or 1.6 cm), and distance (9 or 18 cm) of the targets, presented on a monitor, were manipulated and determined to be of different ID (3.5, 4.5, and 5.5).Results.Individuals with right hemisphere lesion were more sensitive to ID of the task, affecting planning and final position accuracy. Left hemisphere lesion generated slower and less smooth movements and was more influenced by target distance. Contralateral movements and higher ID increased planning demands and hindered movement execution.Conclusion.Right and left hemisphere damages are differentially influenced by task constraints which suggest their complementary roles in the control of aiming movements.

scholarly journals Psychic Tonus, Body Schema and the Parietal Lobes: A Multiple Lesion Case Analysis

2007 ◽  
Vol 18 (2) ◽  
pp. 65-80 ◽  
Author(s):  
C. M. J. Braun ◽  
S. Desjardins ◽  
S. Gaudelet ◽  
A. Guimond
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Hemispheric Specialization ◽  
Body Schema ◽  
The Body ◽  
Parietal Lobes ◽  
Hemisphere Lesion ◽  
The Right ◽  
Internal Experience ◽  
And Behavior

The psychic tonus model (Braun and colleagues, 1999, 2002, 2003, 2006) states that the left hemisphere is a “booster” of internal experience and behavior in general, and that the right hemisphere is a “dampener”. Twenty-five patients with a “positive” extreme disturbance of body schema (somatoparaphrenia) and 37 patients with a “negative” disturbance of body schema (autotopagnosia or Gerstmann’s syndrome), all following a unilateral parietal lesion, were found in the literature and were analyzed to test predictions from Braun’s “psychic tonus” model. As expected, patients with a positive syndrome had a right hemisphere lesion significantly more frequently, and those with a negative syndrome had a left hemisphere lesion significantly more frequently. Thus the psychic tonus model of hemispheric specialization, previously supported with regard to psychomotor baseline, libido, talkativeness, memory, auditory and visual perceptual tonus, now incorporates the tonus of representation of the body (body schema) in the parietal lobes.

Verbal learning and memory after childhood stroke

2004 ◽  
Vol 10 (5) ◽  
pp. 742-752 ◽  
Author(s):  
AMY E. LANSING ◽  
JEFFREY E. MAX ◽  
DEAN C. DELIS ◽  
PETER T. FOX ◽  
JACK LANCASTER ◽  
...  
Keyword(s):  
Working Memory ◽  
Learning And Memory ◽  
Left Hemisphere ◽  
Right Hemisphere ◽  
Digit Span ◽  
Verbal Learning ◽  
Auditory Attention ◽  
Pediatric Stroke ◽  
Control Subjects ◽  
Hemisphere Lesion

Verbal learning and memory (VLM) following pediatric stroke was characterized in a cross-sectional neuropsychological and neuroimaging study of 26 subjects, aged 5 to 17, with a history of pediatric stroke and 26 age, SES, and gender matched orthopedic controls. Further comparisons were made between the VLM profiles of stroke subjects with rightversusleft hemisphere lesions and early (≤12 months)versuslate (>12 months) strokes. Overall, stroke subjects scored significantly lower than control subjects on several VLM indices (California Verbal Learning Test–Children; CVLT–C), as well as on measures of intellectual functioning (IQ) and auditory attention/working memory (Digit Span). Subgroup analyses of the stroke population foundnosignificant differences in VLM, Digit Span, Verbal IQ or Performance IQ when left-hemisphere lesion subjects were compared to right-hemisphere lesion subjects. In contrast, early strokes were associated with significantly fewer words recalled after delay, reduced discriminability (fewer correct hits relative to false positive errors on recognition testing), and relatively worse auditory attention/working memory scores (Digit Span). These findings indicate that pediatric stroke subjects demonstrated more VLM impairment than control subjects, and early strokes were associated with greater recall and recognition deficits. In stark contrast with adult-onset stroke, both left- and right-hemisphere lesions during childhood resulted in similar VLM performance. (JINS, 2004,10, 742–752.)

scholarly journals Crossed Aphasia. II: Why Are Deep Lesions Overrepresented with Respect to Standard Aphasia?

1996 ◽  
Vol 9 (3-4) ◽  
pp. 163-170 ◽  
Author(s):  
M. Laiacona ◽  
E. Capitani ◽  
C. Stangalino ◽  
L. Lorenzi
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Unilateral Neglect ◽  
Large Sample ◽  
Hemisphere Lesion ◽  
Crossed Aphasia ◽  
The Right ◽  
Attentional Mechanisms

In this paper we have reviewed the cases of vascular crossed aphasia reported in the literature, in order to check whether deep lesions are really overrepresented in crossed aphasia with respect to standard aphasia. The comparison with a large sample of standard left-hemisphere-damaged aphasics revealed a significantly higher incidence of purely deep lesions in crossed aphasics than in standard aphasics. The overrepresentation of deep lesions in crossed aphasia appears to be contingent on the co-occurrence of aphasia and Unilateral Neglect after right-hemisphere lesion. This suggests an interaction between language and attentional mechanisms in the case of reversed language lateralisation: the overcrowding of these functions in the right hemisphere could make language more vulnerable after right deep lesions.

Investigation of the Effect of Mode and Tempo on Emotional Responses to Music Using EEG Power Asymmetry

2013 ◽  
Vol 27 (3) ◽  
pp. 142-148 ◽  
Author(s):  
Konstantinos Trochidis ◽  
Emmanuel Bigand
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Emotional Responses ◽  
Interactive Effects ◽  
Eeg Activity ◽  
Musical Excerpt ◽  
Major Mode ◽  
Musical Modes ◽  
Slow Tempo ◽  
The Right

The combined interactions of mode and tempo on emotional responses to music were investigated using both self-reports and electroencephalogram (EEG) activity. A musical excerpt was performed in three different modes and tempi. Participants rated the emotional content of the resulting nine stimuli and their EEG activity was recorded. Musical modes influence the valence of emotion with major mode being evaluated happier and more serene, than minor and locrian modes. In EEG frontal activity, major mode was associated with an increased alpha activation in the left hemisphere compared to minor and locrian modes, which, in turn, induced increased activation in the right hemisphere. The tempo modulates the arousal value of emotion with faster tempi associated with stronger feeling of happiness and anger and this effect is associated in EEG with an increase of frontal activation in the left hemisphere. By contrast, slow tempo induced decreased frontal activation in the left hemisphere. Some interactive effects were found between mode and tempo: An increase of tempo modulated the emotion differently depending on the mode of the piece.

Dual Intentional Agency

2018 ◽  
Author(s):  
Elizabeth Schechter
Keyword(s):  
Left Hemisphere ◽  
Practical Reasoning ◽  
Right Hemisphere ◽  
Brain Surgery ◽  
Experimental Conditions ◽  
Split Brain ◽  
Intentional Agency ◽  
Intentional Agents ◽  
Experimental Findings ◽  
The Right

This chapter defends the 2-agents claim, according to which the two hemispheres of a split-brain subject are associated with distinct intentional agents. The empirical basis of this claim is that, while both hemispheres are the source or site of intentions, the capacity to integrate them in practical reasoning no longer operates interhemispherically after split-brain surgery. As a result, the right hemisphere-associated agent, R, and the left hemisphere-associated agent, L, enjoy intentional autonomy from each other. Although the positive case for the 2-agents claim is grounded mainly in experimental findings, the claim is not contradicted by what we know of split-brain subjects’ ordinary behavior, that is, the way they act outside of experimental conditions.

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