Stable Asymmetric Interhemispheric Theta Power in Patients With Anorexia Nervosa During Haptic Perception Even After Weight Gain: A Longitudinal Study

Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema

“…Noteworthy, a further finding is that, at the beginning of exploration, OBS showed a significantly lower theta, alpha and beta power in the right hemisphere in comparison with CTR, especially in temporo-parietal regions. In agreement with the results obtained in previous studies on anorectic patients [13,14], our study revealed that extreme obese participants have lower theta power in the right posterior hemisphere, especially during the beginning of the exploration. Whereas, in contrast to what occurred in the lower frequency bands, gamma activity in the OBS group was enhanced across the left fronto-central channels, in all the experimental intervals (Figure 5A,B).…”

Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema

“…Noteworthy, a further finding is that, at the beginning of exploration, OBS showed a significantly lower theta, alpha and beta power in the right hemisphere in comparison with CTR, especially in temporo-parietal regions. In agreement with the results obtained in previous studies on anorectic patients [13,14], our study revealed that extreme obese participants have lower theta power in the right posterior hemisphere, especially during the beginning of the exploration. Whereas, in contrast to what occurred in the lower frequency bands, gamma activity in the OBS group was enhanced across the left fronto-central channels, in all the experimental intervals (Figure 5A,B).…”

The sight of one’s own body: Could qEEG help predict the treatment response in anorexia nervosa?

“…Results from the Disgust stimulus condition confirm the right hemisphere (RH) dominance reported by numerous research groups ( Grunwald et al, 2004 ; Galusca et al, 2008 ; Trautmann-Lengsfeld et al, 2013 ). The source localization algorithm does not involve subcortical structures; the activity of the limbic system is accessible only indirectly through sites with solid connections to its prominent parts.…”

Nonvisual Multisensory Impairment of Body Perception in Anorexia Nervosa: A Systematic Review of Neuropsychological Studies

“…The tactile component also includes haptic perception that is, based on active haptic exploration of objects [22] . AN patients showed no impairment in the identification of simple shapes [23] , [34] , while they showed greater difficulty with complex haptic information compared to controls both before and after weight gain [22] , [32] , [33] . The last two studies also revealed that AN patients had electroencephalographic alterations during haptic tasks in parietal areas.…”

“…To sum up, haptic reproduction abilities were poorer in AN patients compared to controls both before and after weight gain [22] , [32] , [33] . Furthermore, these difficulties seems to be related to functional alterations of the right parietal lobe [32] , [33] .…”

“…To sum up, haptic reproduction abilities were poorer in AN patients compared to controls both before and after weight gain [22] , [32] , [33] . Furthermore, these difficulties seems to be related to functional alterations of the right parietal lobe [32] , [33] . On the other hand, no significant differences were found between AN patients and controls in the discrimination of simple haptic stimuli [23] , [34] .…”

Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema

“…Noteworthy, a further finding is that, at the beginning of exploration, OBS showed a significantly lower theta, alpha and beta power in the right hemisphere in comparison with CTR, especially in temporo-parietal regions. In agreement with the results obtained in previous studies on anorectic patients [13,14], our study revealed that extreme obese participants have lower theta power in the right posterior hemisphere, especially during the beginning of the exploration. Whereas, in contrast to what occurred in the lower frequency bands, gamma activity in the OBS group was enhanced across the left fronto-central channels, in all the experimental intervals (Figure 5A,B).…”

The sight of one’s own body: Could qEEG help predict the treatment response in anorexia nervosa?

“…Results from the Disgust stimulus condition confirm the right hemisphere (RH) dominance reported by numerous research groups ( Grunwald et al, 2004 ; Galusca et al, 2008 ; Trautmann-Lengsfeld et al, 2013 ). The source localization algorithm does not involve subcortical structures; the activity of the limbic system is accessible only indirectly through sites with solid connections to its prominent parts.…”

Nonvisual Multisensory Impairment of Body Perception in Anorexia Nervosa: A Systematic Review of Neuropsychological Studies

“…The tactile component also includes haptic perception that is, based on active haptic exploration of objects [22] . AN patients showed no impairment in the identification of simple shapes [23] , [34] , while they showed greater difficulty with complex haptic information compared to controls both before and after weight gain [22] , [32] , [33] . The last two studies also revealed that AN patients had electroencephalographic alterations during haptic tasks in parietal areas.…”

“…To sum up, haptic reproduction abilities were poorer in AN patients compared to controls both before and after weight gain [22] , [32] , [33] . Furthermore, these difficulties seems to be related to functional alterations of the right parietal lobe [32] , [33] .…”

“…To sum up, haptic reproduction abilities were poorer in AN patients compared to controls both before and after weight gain [22] , [32] , [33] . Furthermore, these difficulties seems to be related to functional alterations of the right parietal lobe [32] , [33] . On the other hand, no significant differences were found between AN patients and controls in the discrimination of simple haptic stimuli [23] , [34] .…”

Haptic Perception in Extreme Obesity: qEEG Study Focused on Predictive Coding and Body Schema

“…Noteworthy, a further finding is that, at the beginning of exploration, OBS showed a significantly lower theta, alpha and beta power in the right hemisphere in comparison with CTR, especially in temporo-parietal regions. In agreement with the results obtained in previous studies on anorectic patients [13,14], our study revealed that extreme obese participants have lower theta power in the right posterior hemisphere, especially during the beginning of the exploration. Whereas, in contrast to what occurred in the lower frequency bands, gamma activity in the OBS group was enhanced across the left fronto-central channels, in all the experimental intervals (Figure 5A,B).…”

The sight of one’s own body: Could qEEG help predict the treatment response in anorexia nervosa?

“…Results from the Disgust stimulus condition confirm the right hemisphere (RH) dominance reported by numerous research groups ( Grunwald et al, 2004 ; Galusca et al, 2008 ; Trautmann-Lengsfeld et al, 2013 ). The source localization algorithm does not involve subcortical structures; the activity of the limbic system is accessible only indirectly through sites with solid connections to its prominent parts.…”

Nonvisual Multisensory Impairment of Body Perception in Anorexia Nervosa: A Systematic Review of Neuropsychological Studies

“…The tactile component also includes haptic perception that is, based on active haptic exploration of objects [22] . AN patients showed no impairment in the identification of simple shapes [23] , [34] , while they showed greater difficulty with complex haptic information compared to controls both before and after weight gain [22] , [32] , [33] . The last two studies also revealed that AN patients had electroencephalographic alterations during haptic tasks in parietal areas.…”

“…To sum up, haptic reproduction abilities were poorer in AN patients compared to controls both before and after weight gain [22] , [32] , [33] . Furthermore, these difficulties seems to be related to functional alterations of the right parietal lobe [32] , [33] .…”

“…To sum up, haptic reproduction abilities were poorer in AN patients compared to controls both before and after weight gain [22] , [32] , [33] . Furthermore, these difficulties seems to be related to functional alterations of the right parietal lobe [32] , [33] . On the other hand, no significant differences were found between AN patients and controls in the discrimination of simple haptic stimuli [23] , [34] .…”