Haptic processing by the left hemisphere in a split-brain patient

Badan, Maryse; Caramazza, Alfonso

doi:10.1016/s0028-3932(97)00051-1

Cited by 8 publications

(4 citation statements)

References 24 publications

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“…One patient with total callosotomy (FB) and the two with part of the splenium (DB) or with the rostral two‐thirds of the callosum (MR) spared, failed to name objects felt with the left hand only in 25–40% of trials. The failure of interhemispheric transfer following total callosotomy, observed in two subjects (DDV and RN), may well be partial in the tactile modality, as good performance in tactile naming (Myers & Sperry 1985; Badan & Caramazza 1997) and performance above chance even in intermanual point localization (Geffen et al . 1985) have been reported in patients with total callosotomy.…”

Section: Discussionmentioning

confidence: 99%

Role of the corpus callosum in the somatosensory activation of the ipsilateral cerebral cortex: an fMRI study of callosotomized patients

Fabri

Polonara

Quattrini

et al. 1999

Eur J of Neuroscience

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To verify whether the activation of the posterior parietal and parietal opercular cortices to tactile stimulation of the ipsilateral hand is mediated by the corpus callosum, a functional magnetic resonance imaging (fMRI, 1.0 tesla) study was performed in 12 control and 12 callosotomized subjects (three with total and nine with partial resection). Eleven patients were also submitted to the tactile naming test. In all subjects, unilateral tactile stimulation provoked a signal increase temporally correlated with the stimulus in three cortical regions of the contralateral hemisphere. One corresponded to the first somatosensory area, the second was in the posterior parietal cortex, and the third in the parietal opercular cortex. In controls, activation was also observed in the ipsilateral posterior parietal and parietal opercular cortices, in regions anatomically corresponding to those activated contralaterally. In callosotomized subjects, activation in the ipsilateral hemisphere was observed only in two patients with splenium and posterior body intact. These two patients and another four with the entire splenium and variable portions of the posterior body unsectioned named objects explored with the right and left hand without errors. This ability was impaired in the other patients. The present physiological and anatomical data indicate that in humans activation of the posterior parietal and parietal opercular cortices in the hemisphere ipsilateral to the stimulated hand is mediated by the corpus callosum, and that the commissural fibres involved probably cross the midline in the posterior third of its body.

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Section: Discussionmentioning

confidence: 99%

Role of the corpus callosum in the somatosensory activation of the ipsilateral cerebral cortex: an fMRI study of callosotomized patients

Fabri

Polonara

Quattrini

et al. 1999

Eur J of Neuroscience

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“…Patients with callosal alterations of different locations and extent or splenium agenesis should present distinct symptoms of disconnection syndrome ( Campbell et al, 1981). However, studies in patients who have undergone callosotomy have not been conclusive, likely because of the heterogeneity of patients’ clinical features and age, the extent of resection, and the different methods used to investigate the related deficits ( Bentin et al, 1984; Badan and Caramazza, 1997). While AgCC may be associated with neurological problems, it is thought that such conditions are due to anomalies in cerebral connections rather than in the corpus callosum itself ( Sande and Garge, 2010).…”

Section: Discussionmentioning

confidence: 99%

Selective Emotional Dysregulation in Splenium Agenesis. A Case Report of a Patient With Normal Cognitive Profile

et al. 2019

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Objective: Patients with lesions of the corpus callosum are rare and may present different symptoms of the disconnection syndrome. However, to-date studies on callosotomized patients have not been conclusive, likely because of the non-uniform nature of clinical features, the extent of resection, and methods used to investigate specific and related deficits. Agenesis of the corpus callosum (AgCC) may be asymptomatic and discovered incidentally or associated with very slight deficits diagnosed during neurological examinations. In this study, we reported a case of an apparently completely asymptomatic 23-year-old woman with appreciable agenesis of the splenium of the corpus callosum. Methods: She underwent a neurological evaluation, a comprehensive battery of neuropsychological tests to identify any subclinical dysfunction that may affect the functionality of the subject in the daily life. Specifically, the possible presence of emotion dysregulation was examined by using a self-report questionnaire. Results: She showed normal neuropsychological and emotional functioning, performing efficiently on tests measuring acquired brain impairment. Discussion: The present case is discussed in terms of neuroplasticity – with a focus on putative compensatory mechanisms – emphasizing the variegated clinical feature patterns of brain defects present from birth.

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“…Every day in our lives, multi-mode perception events occur: when we see someone else's mouth moving, they will hear their voices; when our fingers are pierced by the needle tip and feel pain, the eyes will see puncture The location oozes blood. In the 1990s, brain researchers discovered that there is a single pattern of sensory information processing within the brain, that is, areas that deal with visual, tactile, auditory and other perceptual information [9]. In recent years, brain science researchers have further discovered that there are also areas for processing multi-modal information fusion inside the brain, especially for the intersection of visual, auditory and tactile patterns.…”

Section: Inspiration From Neurophysiologymentioning

confidence: 99%

“…where k is the learning coefficient between (0-1), and the learning process is as shown in equations ( 8) and (9).ε withε It is the error produced in the two directions of motion.…”

Section: Image Information Colour Grayscale Shape Position Significant Degreementioning

confidence: 99%

Robot Visual Tactile Information Fusion Drives Visual Attention

Sun¹,

Yu²,

Ma³

et al. 2019

dtetr

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This paper describes a theoretical model of visual tactile information fusion mode to drive visual attention. According to the visual and tactile information obtained by the robot, the corresponding position of the most important object and the stimulation signal point for the current task is determined, and the visual attention is focused on the target object of interest. According to the error information fed back by the sensor, the relevant parameters are continuously corrected, and the robustness of the system is improved. The theory was tested on a robot with two degrees of freedom on the head and two degrees of freedom on the arm. The test results show that the model can adapt to changes in itself and the environment and has good robustness.

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Haptic processing by the left hemisphere in a split-brain patient

Cited by 8 publications

References 24 publications

Role of the corpus callosum in the somatosensory activation of the ipsilateral cerebral cortex: an fMRI study of callosotomized patients

Role of the corpus callosum in the somatosensory activation of the ipsilateral cerebral cortex: an fMRI study of callosotomized patients

Selective Emotional Dysregulation in Splenium Agenesis. A Case Report of a Patient With Normal Cognitive Profile

Robot Visual Tactile Information Fusion Drives Visual Attention

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