Tourette's Syndrome and Right Hemisphere Dysfunction

1993 ◽  
Vol 163 (1) ◽  
pp. 116-118 ◽  
Author(s):  
J. B. K. Lanser ◽  
W. H. C. Van Santen ◽  
A. Jennekens-Schinkel ◽  
R. A. C. Roos
Keyword(s):  
British Journal ◽  
Right Hemisphere ◽  
Tourette's Syndrome ◽  
Tourette’S Syndrome ◽  
Neuropsychological Examination ◽  
Right Hemisphere Dysfunction ◽  
Perceptual Abilities ◽  
The Right

Poor performances of patients with Tourette's syndrome (TS) on tests requiring visual-perceptual abilities had led previous authors to the suggestion of right hemisphere involvement. We have compared the results of neuropsychological examination of 16 children with TS, with those of 16 children with a lesion of the right hemisphere. No evidence was found of a dysfunction of the right hemisphere in TS.British Journal of Psychiatry (1993), 163, 116–118

The right hemisphere: neuropsychological functions

1986 ◽  
Vol 64 (5) ◽  
pp. 693-704 ◽  
Author(s):  
Kenneth M. Heilman ◽  
Dawn Bowers ◽  
Edward Valenstein ◽  
Robert T. Watson
Keyword(s):  
Emotional Disorders ◽  
Right Hemisphere ◽  
Content Type ◽  
Reading And Writing ◽  
The Past ◽  
Right Hemisphere Damage ◽  
Right Hemisphere Dysfunction ◽  
Neuropsychological Functions ◽  
The Right ◽  
Fine Print

✓ In the past two to three decades, clinicians and neuroscientists have been studying the functions of the right hemisphere. Neither hemisphere seems to be dominant in the absolute sense. Each appears to be specialized and is dominant for different functions. However, most functions require the cooperation of both hemispheres. When one is damaged, the other can often compensate for the damaged one. Lesions of the left hemisphere are associated with language (speech, reading, and writing) and praxic disorders, and lesions of the right hemisphere can result in visuospatial, attentional, and emotional disorders. The authors review some of the major behavioral disorders associated with right hemisphere dysfunction and concentrate on three major types of disorders — visuospatial, attentional, and emotional. Although not all the behavioral defects associated with right hemisphere damage can be subgrouped under these three types, they are the ones most often associated with right hemisphere lesions.

Hemispheric function in disorganized type schizophrenia: performance on the Quality Extinction Test

2000 ◽  
Vol 15 (7) ◽  
pp. 402-406 ◽  
Author(s):  
B Spivak ◽  
D Elimelech ◽  
R Ocring ◽  
R Mester ◽  
M Kotler ◽  
...  
Keyword(s):  
Right Hemisphere ◽  
Extinction Test ◽  
Left Hand ◽  
Tactile Stimuli ◽  
Right Hemisphere Dysfunction ◽  
Interhemispheric Transmission ◽  
Schizophrenic Patients ◽  
The Right ◽  
Age Range ◽  
Normal Controls

We assessed hemisphere function in right-handed male chronic, disorganized type schizophrenic patients (N = 60, age range 18–45 years) using the Quality Extinction Test (QET), in comparison to 20 right-handed male healthy controls in the same age range. The QET analysis discriminated between the disorganized schizophrenic patients and the controls. QET results indicated that chronic schizophrenic patients were less sensitive to tactile stimuli in both hands as compared to controls. Furthermore, the sensitivity to tactile stimuli of the left hand was less than that of the right hand in the schizophrenic patients. In contrast, in the normal controls the sensitivity was similar in both hands. These results indicate possible right hemisphere dysfunction together with disturbance in interhemispheric transmission through the corpus callosum in chronic, disorganized type schizophrenic patients.

Functional hemisphere imbalance in patients with paranoid or disorganized schizophrenia

1996 ◽  
Vol 11 (4) ◽  
pp. 175-179 ◽  
Author(s):  
B Spivak ◽  
N Karny ◽  
G Katz ◽  
M Radwan ◽  
A Apter ◽  
...  
Keyword(s):  
Functional Impairment ◽  
Dichotic Listening ◽  
Right Hemisphere ◽  
Paranoid Schizophrenia ◽  
Chronic Schizophrenic ◽  
Control Subjects ◽  
Listening Tests ◽  
Right Hemisphere Dysfunction ◽  
Schizophrenic Patients ◽  
The Right

SummaryWe assessed hemisphere function in right-handed male chronic schizophrenic patients using dichotic listening tests. We evaluated digit, tonic and transitional tests in patients with paranoid schizophrenia (n = 8), patients with disorganized schizophrenia (n = 8) and in control subjects (n = 8). The dichotic listening analysis discriminated between paranoid and disorganized schizophrenia. In disorganized schizophrenia, functional impairment of both hemispheres was demonstrated, while in paranoid schizophrenia dysfunction was more prominent in the right hemisphere. These results indicate the possible involvement of right hemisphere dysfunction in the pathophysiology of chronic paranoid schizophrenia, in contrast to dysfunction of both hemispheres in chronic disorganized schizophrenia.

Intermanual Differences on Motor and Psychomotor Tests in Alcoholics: No Evidence for Selective Right-Hemisphere Dysfunction

1997 ◽  
Vol 84 (2) ◽  
pp. 403-414 ◽  
Author(s):  
Lauren M. Kwon ◽  
Sean B. Rourke ◽  
Igor Grant
Keyword(s):  
Right Hemisphere ◽  
Poor Performance ◽  
Fine Motor ◽  
Motor Speed ◽  
Psychomotor Tests ◽  
Chronic Alcohol Abuse ◽  
Right Hemisphere Dysfunction ◽  
Motor Dexterity ◽  
The Right

Some previous studies have suggested that alcoholics exhibit selective right-hemisphere dysfunction, based on alcoholics' poor performance on tests believed to subserve the right hemisphere. However, some of these experiments did not account adequately for differences in difficulty or novelty in putative right hemisphere tasks. This experiment was designed to evaluate and compare intermanual differences in grip strength, motor speed, fine-motor dexterity, and nonverbal problem-solving ability in 93 recently detoxified alcoholics, 54 long-term abstinent alcoholics, and 73 nonalcoholic controls. All subjects were right-handed men, matched for age and education, and both alcoholic groups had similar drinking histories. Using percent difference scores to assess intermanual differences, adjusted for demographics where appropriate, we found that, although recently detoxified alcoholics demonstrate some motor and psychomotor impairments, there is no evidence using these tests to suggest the right hemisphere is selectively more vulnerable to the effects of chronic alcohol abuse.

Visual field processing in paranoid and non-paranoid schizophrenics

1993 ◽  
Vol 8 (6) ◽  
pp. 301-307 ◽  
Author(s):  
E Aharonovich ◽  
N Karny ◽  
I Nachson
Keyword(s):  
Visual Field ◽  
Left Hemisphere ◽  
Left Visual Field ◽  
Right Hemisphere ◽  
Paranoid Schizophrenia ◽  
Visual Fields ◽  
Auditory Modality ◽  
Right Hemisphere Dysfunction ◽  
The Right ◽  
Normal Controls

SummaryThe hypothesis that paranoid and non-paranoid schizophrenics are differentially associated with unilateral hemisphere dysfunction was tested on 12 paranoid and 12 non-paranoid schizophrenics, as well as on 24 affective patients and 24 normal controls. The subjects were presented for 150 ms with series of digit-pairs and open rings to the left or right visual fields. Overall recognition of digits and localization of gaps in the rings were better for the right than for the left visual field. However, performance of the paranoid and non-paranoid schizophrenics was relatively poorer in response to the right and left visual field stimuli, respectively. Since these data do not correspond to the findings obtained in the auditory modality, they were interpreted as indicating modality-specific associations of paranoid schizophrenia with left hemisphere dysfunction, and of non-paranoid schizophrenia with right hemisphere dysfunction.

scholarly journals DYNAMICS OF HIGHER MENTAL FUNCTIONS AT YOUNGER ADOLESCENT

2020 ◽  
Vol 12 (5(74)) ◽  
pp. 10-12
Author(s):  
T.A. Fotekova ◽  
K.A. Bogomolova
Keyword(s):  
Longitudinal Study ◽  
Right Hemisphere ◽  
Descriptive Statistics ◽  
Positive Trend ◽  
Young Adolescents ◽  
Mental Functions ◽  
Neuropsychological Examination ◽  
Higher Mental Functions ◽  
The Right ◽  
Non Parametric

Provided are results of a study of the dynamics of higher mental functions in young adolescents obtained in the course of a longitudinal study are presented. For three years, schoolchildren underwent a complete neuropsychological examination, and the obtained data were processed using descriptive statistics and non-parametric criteria of Friedman and Wilcoxon. The revealed dynamics of higher mental functions is multidirectionalin nature: along with the general positive trend, there will be a decrease in some indicators, primarily related to the functions of the right hemisphere, because younger adolescence is accompanied by the onset of puberty.

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.

Right-Hemisphere Specialization for Contour Grouping

2014 ◽  
Vol 61 (5) ◽  
pp. 331-339 ◽  
Author(s):  
Gregor Volberg
Keyword(s):  
Right Hemisphere ◽  
Contour Detection ◽  
Global Processing ◽  
Detection Accuracy ◽  
Frequency Spectra ◽  
Visual Hemifield ◽  
Spatial Frequencies ◽  
A Chain ◽  
The Right ◽  
Hemisphere Specialization

Previous studies often revealed a right-hemisphere specialization for processing the global level of compound visual stimuli. Here we explore whether a similar specialization exists for the detection of intersected contours defined by a chain of local elements. Subjects were presented with arrays of randomly oriented Gabor patches that could contain a global path of collinearly arranged elements in the left or in the right visual hemifield. As expected, the detection accuracy was higher for contours presented to the left visual field/right hemisphere. This difference was absent in two control conditions where the smoothness of the contour was decreased. The results demonstrate that the contour detection, often considered to be driven by lateral coactivation in primary visual cortex, relies on higher-level visual representations that differ between the hemispheres. Furthermore, because contour and non-contour stimuli had the same spatial frequency spectra, the results challenge the view that the right-hemisphere advantage in global processing depends on a specialization for processing low spatial frequencies.

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