Amplitude‐modulation detection in two patients with left‐ or right‐hemisphere damage

2000 ◽  
Vol 107 (5) ◽  
pp. 2917-2917
Author(s):  
Christian Lorenzi ◽  
Jocelyne Wable ◽  
Christine Moroni ◽  
Catherine Belin ◽  
Bruno Frachet
Keyword(s):  
Amplitude Modulation ◽  
Right Hemisphere ◽  
Right Hemisphere Damage ◽  
Modulation Detection

Verbal comprehension deficits after right hemisphere damage

1980 ◽  
Vol 1 (3) ◽  
pp. 279-294 ◽  
Author(s):  
Daniel B. Hier ◽  
Joni Kaplan
Keyword(s):  
Educational Attainment ◽  
Sentence Comprehension ◽  
Right Hemisphere ◽  
Vocabulary Test ◽  
Verbal Comprehension ◽  
Visuospatial Deficits ◽  
Control Subjects ◽  
Right Hemisphere Damage ◽  
The Right ◽  
Grammatical Sentence

ABSTRACTWe have compared the verbal comprehension abilities of 34 right hemisphere damaged patients to 16 hospitalized control subjects of comparable age and educational attainment. The right hemisphere damaged patients performed as well as the control subjects on a vocabulary test, but were impaired in their ability to interpret proverbs and comprehend logico-grammatical sentences. Impairment on the proverbs test was the result of a decrease in the number of abstract interpretations, whereas impairment on the logico-grammatical sentence comprehension test was related to difficultes in grasping spatial and passive relationships. These comprehension impairments tended to correlate with visuospatial deficits and hemianopia, but not with the degree of hemiparesis or the presence of sensory extinction. Patients with anterior right hemisphere damage performed better on the logico-grammatical sentence conprehension test than patients with posterior damage. A variety of factors probably contribute to these verbal deficits including impaired intellect, inattention, an inability to grasp spatial relationships, and difficulties in manipulating the inner schemata of language.

Unwanted reflex-like saccades in visual extinction patients

1999 ◽  
Vol 22 (4) ◽  
pp. 683-683 ◽  
Author(s):  
Alessandra Fanini ◽  
Carlo Alberto Marzi
Keyword(s):  
Reaction Time ◽  
Right Hemisphere ◽  
Visual Stimuli ◽  
Reaction Time Task ◽  
Time Task ◽  
Right Hemisphere Damage ◽  
Visual Extinction ◽  
Manual Reaction Time

We studied patients with left visual extinction following right hemisphere damage in a simple manual reaction time task using brief visual stimuli. With unilateral lateralized stimuli the patients showed a high proportion of unwanted, reflex-like saccades to either side of stimulation. In contrast, with bilateral stimuli there was an overall decrease in the proportion of unwanted saccades, and the vast majority of them were directed toward the ipsilesional side. The implications of these results for the Findlay & Walker model are discussed.

Disturbance of rhythm sense following right hemisphere damage

1990 ◽  
Vol 28 (12) ◽  
pp. 1317-1323 ◽  
Author(s):  
Wolfgang Fries ◽  
Andrew A. Swihart
Keyword(s):  
Right Hemisphere ◽  
Right Hemisphere Damage

Interaction between spatial neglect and attention deficit in patients with right hemisphere damage

Cortex ◽  
2021 ◽  
Author(s):  
Yusaku Takamura ◽  
Shintaro Fujii ◽  
Satoko Ohmatsu ◽  
Koki Ikuno ◽  
Kohei Tanaka ◽  
...  
Keyword(s):  
Attention Deficit ◽  
Right Hemisphere ◽  
Spatial Neglect ◽  
Right Hemisphere Damage

scholarly journals Right hemisphere damage: Communication processing in adults evaluated by the Brazilian Protocole MEC - Bateria MAC

2007 ◽  
Vol 1 (3) ◽  
pp. 266-275 ◽  
Author(s):  
Rochele Paz Fonseca ◽  
Jandyra Maria Guimarães Fachel ◽  
Márcia Lorena Fagundes Chaves ◽  
Francéia Veiga Liedtke ◽  
Maria Alice de Mattos Pimenta Parente
Keyword(s):  
Right Hemisphere ◽  
Damage Effect ◽  
Control Group ◽  
Clinical Group ◽  
Conversational Discourse ◽  
Lexical Semantic ◽  
Right Hemisphere Damage ◽  
Right Brain ◽  
Communication Processes ◽  
Brazilian Version

Abstract Right-brain-damaged individuals may present discursive, pragmatic, lexical-semantic and/or prosodic disorders. Objective: To verify the effect of right hemisphere damage on communication processing evaluated by the Brazilian version of the Protocole Montréal d'Évaluation de la Communication (Montreal Communication Evaluation Battery) - Bateria Montreal de Avaliação da Comunicação, Bateria MAC, in Portuguese. Methods: A clinical group of 29 right-brain-damaged participants and a control group of 58 non-brain-damaged adults formed the sample. A questionnaire on sociocultural and health aspects, together with the Brazilian MAC Battery was administered. Results: Significant differences between the clinical and control groups were observed in the following MAC Battery tasks: conversational discourse, unconstrained, semantic and orthographic verbal fluency, linguistic prosody repetition, emotional prosody comprehension, repetition and production. Moreover, the clinical group was less homogeneous than the control group. Conclusions: A right-brain-damage effect was identified directly, on three communication processes: discursive, lexical-semantic and prosodic processes, and indirectly, on pragmatic process.

scholarly journals Sensory deficits in ipsilesional upper-extremity in chronic stroke patients

2015 ◽  
Vol 73 (10) ◽  
pp. 834-839 ◽  
Author(s):  
Núbia Maria Freire Vieira Lima ◽  
Karina Cândido Menegatti ◽  
Érica Yu ◽  
Natália Yumi Sacomoto ◽  
Thais Botossi Scalha ◽  
...  
Keyword(s):  
Right Hemisphere ◽  
Thermal Sensation ◽  
Chronic Stroke ◽  
Sensory Loss ◽  
Stroke Patients ◽  
Sensory Assessment ◽  
Sensory Deficits ◽  
Left Handed ◽  
Right Hemisphere Damage ◽  
The Right

Objective To investigate somatosensory deficits in the ipsilesional wrist and hand in chronic stroke patients and correlate these deficits with contralesional sensorimotor dysfunctions, functional testing, laterality and handedness.Methods Fifty subjects (twenty-two healthy volunteers and twenty-eight stroke patients) underwent evaluation with Semmes-Weinstein monofilaments, the sensory and motor Fugl-Meyer Assessment, the Nottingham Sensory Assessment in both wrists and hands and functional tests.Results Twenty-five patients had sensory changes in the wrist and hand contralateral to the stroke, and eighteen patients (64%) had sensory deficits in the ipsilesional wrist and hand. The most significant ipsilesional sensory loss was observed in the left-handed patients. We found that the patients with brain damage in the right hemisphere had better scores for ipsilesional tactile sensation.Conclusions A reduction in ipsilesional conscious proprioception, tactile or thermal sensation was found in stroke subjects. Right hemisphere damage and right-handed subjects had better scores in ipsilesional tactile sensation.

Amplitude-modulation detection by gerbils in reverberant sound fields

2013 ◽  
Vol 302 ◽  
pp. 107-112 ◽  
Author(s):  
Andrea Lingner ◽  
Kathrin Kugler ◽  
Benedikt Grothe ◽  
Lutz Wiegrebe
Keyword(s):  
Amplitude Modulation ◽  
Sound Fields ◽  
Modulation Detection

scholarly journals Awareness is in the Eye of the Observer: Preserved Third-Person Awareness of Deficit in Anosognosia for Hemiplegia

2021 ◽  
Author(s):  
Sahba Besharati ◽  
Paul Jenkinson ◽  
Michael Kopelman ◽  
Mark Solms ◽  
Valentina Moro ◽  
...  
Keyword(s):  
Social Cognition ◽  
Perspective Taking ◽  
Right Hemisphere ◽  
First Person ◽  
Self Awareness ◽  
Person Perspective ◽  
Right Hemisphere Damage ◽  
Third Person ◽  
Third Person Perspective ◽  
Anosognosia For Hemiplegia

In recent decades, the research traditions of (first-person) embodied cognition and of (third-person) social cognition have approached the study of self-awareness with relative independence. However, neurological disorders of self-awareness offer a unifying perspective to empirically investigate the contribution of embodiment and social cognition to self-awareness. This study focused on a neuropsychological disorder of bodily self-awareness following right-hemisphere damage, namely anosognosia for hemiplegia (AHP). A previous neuropsychological study has shown AHP patients, relative to neurological controls, to have a specific deficit in third-person, allocentric inferences in a story-based, mentalisation task. However, no study has tested directly whether verbal awareness of motor deficits is influenced by either perspective-taking or centrism, and if these deficits in social cognition are correlated with damage to anatomical areas previously linked to mentalising, including the supramarginal and superior temporal gyri and related limbic white matter connections. Accordingly, two novel experiments were conducted with right-hemisphere stroke patients with (n = 17) and without AHP (n = 17) that targeted either their own (egocentric, experiment 1) or another stooge patient’s (experiment 2) motor abilities from a first-or-third person (allocentric in Experiment 2) perspective. In both experiments, neurological controls showed no significant difference between perspectives, suggesting that perspective-taking deficits are not a general consequence of right-hemisphere damage. More specifically, experiment 1 found AHP patients were more aware of their own motor paralysis when asked from a third compared to a first-person perspective, using both group level and individual level analysis. In experiment 2, AHP patients were less accurate than controls in making allocentric, third-person perspective judgements about the stooge patient, but with only a trend towards significance and with no within-group, difference between perspectives. Deficits in egocentric and allocentric third-person perspective taking were associated with lesions in the middle frontal gyrus, superior temporal and supramarginal gyri, with white matter disconnections more predominate in deficits in allocentricity. This study confirms previous clinical and empirical investigations on the selectivity of first-person motor awareness deficits in anosognosia for hemiplegia and experimentally demonstrates for the first time that verbal egocentric 3PP-taking can positively influence 1PP body awareness.

scholarly journals Amplitude modulation detection by human listeners in reverberant sound fields: carrier bandwidth effects and binaural versus monaural comparison

2012 ◽  
Vol 131 (4) ◽  
pp. 3517-3517
Author(s):  
Pavel Zahorik ◽  
Duck O. Kim ◽  
Shigeyuki Kuwada ◽  
Paul W. Anderson ◽  
Eugene Brandewie ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Sound Fields ◽  
Modulation Detection
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