PMC5442171_01
Axial T2-weighted image. (A) Presence of left craniectomy. Extensive mature injury mostly involving the left middle and posterior cerebral artery territories. Nearly all of the left temporal lobe was involved (not shown). (B) Coronal T2-weighted FLAIR image. Less extensive mature regions of cortical injury, best seen in the right posterior sylvian cortex (white arrow) and right parietal cortex. Symmetrical mature injury of the cerebellar hemispheres was also noted (not shown).
fneur-08-00226-g001.jpg
PMC5442171_01_fneur-08-00226-g001.jpg
F1
Symmetrical mature injury of the cerebellar hemispheres was also noted (Figure 1).
Schematic representation of auditory trained skills. The training started with less complex stimuli and tasks, such as the tasks involving frequency discrimination. Gradually, speech stimuli and also complex tasks involving speech with background noise were introduced, especially focused on the right ear. In the last weeks, top-down tasks involving working memory and sustained attention were included.
fneur-08-00226-g002.jpg
PMC5442171_01_fneur-08-00226-g002.jpg
F2
PMC5442171_02
PMC5442171_03
Illustration representing monaural and dichotic conditions. (A) Monaural condition with speech stimuli presented on the left ear. Contralateral pathways transport the speech stimuli to the right hemisphere, where it is successfully processed. (B) Monaural condition with speech stimuli presented on the right ear. Ipsilateral pathways transport the stimuli to the right hemisphere; however, it is not properly conducted due to the weakness of the ipsilateral tract. (C) Dichotic condition. Contralateral pathways transport the speech stimuli to the opposite hemisphere, leading to a good performance on the left ear and poor performance on the right ear.
fneur-08-00226-g003.jpg
PMC5442171_03_fneur-08-00226-g003.jpg
F3
Figure 3 illustrates the differences in terms of physiological mechanisms when the stimuli are presented dichotically and monaurally taking into account the left brain injury and the hypothesis of reorganization of language function on the right hemisphere.