NoteIntra- and interhemispheric processing of visual information in callosal agenesis
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Cited by (57)
Brain functional connectivity in individuals with callosotomy and agenesis of the corpus callosum: A systematic review
2019, Neuroscience and Biobehavioral ReviewsCitation Excerpt :The IHT times are found to be slower in individuals with AgCC than in normal controls, but faster than in split-brain patients (Aglioti et al., 1993; Forster and Corballis, 1998). Interestingly, even a complete AgCC does not result in the classic disconnection syndrome characterized by the same severity as that observed in split-brain patients (Brown et al., 2001, 1999; Chiarello, 1980; Jeeves and Silver, 1988; Sauerwein and Lassonde, 1983). Rather, social impairments (Badaruddin et al., 2007; Brown and Paul, 2000; Lábadi and Beke, 2017; Lau et al., 2013; Paul, 2004), deficits in pragmatic linguistic functions (Brown et al., 2005; Brown and Paul, 2000; Paul et al., 2003) and problem solving (Brown and Paul, 2000) are frequently observed in individuals whose primary condition is AgCC.
Long-term reliability of the visual EEG Poffenberger paradigm
2017, Behavioural Brain ResearchCitation Excerpt :Nevertheless, bCUD has been shown to be a valid method for comparisons between healthy participants and neuropathological groups. For example, differences in inter-hemispheric transmission were shown in split-brain patients [44], as well as in patients with callosal agenesis, compared to healthy controls [45]. Additionally, although there appears to be no difference in inter-hemispheric transfer in schizophrenic or bipolar patients compared to healthy subjects, an abnormal redundant signal effect was found in these patient groups with the help of the behavioral Poffenberger paradigm [46].
Proverb comprehension in individuals with agenesis of the corpus callosum
2016, Brain and LanguageCitation Excerpt :Individuals with isolated AgCC and intact IQ appear to have a consistent profile of mild cognitive and developmental deficits. This profile includes mild to moderate difficulties on tasks necessitating bimanual coordination of motor movements (Jeeves, Silver, & Jacobson, 1988; Jeeves, Silver, & Milner, 1988; Mueller, Marion, Paul, & Brown, 2009), diminished interhemispheric transfer of complex sensory information (Brown, Jeeves, Dietrich, & Burnison, 1999; Imamura, Yamadori, Shiga, Sahara, & Abiko, 1994; Jeeves, 1979; Jeeves & Silver, 1988; Karnath, Schumacher, & Wallesch, 1991; Sauerwein & Lassonde, 1983) and poor complex novel problem-solving (Gott & Saul, 1978; Sauerwein et al., 1994; Smith & Rourke, 1995; Solursh, Margulies, Ashem, & Stasiak, 1965). On tasks involving more complex cognitive processes, performance is typically characterized by slow reaction times and processing speed (Brown, Thrasher, & Paul, 2001; Brown et al., 1999; Hines, Paul, & Brown, 2002; Marco et al., 2012).
Cortical thickness in adults with agenesis of the corpus callosum
2015, NeuropsychologiaCitation Excerpt :Although these alternative pathways allow the maintenance of interhemispheric communication and possibly contribute to the superior performance of individuals with AgCC in comparison to split-brain patients, these compensatory mechanisms have their limits (Sauerwein and Lassonde, 1983). Indeed, in visual or sensorimotor tasks, when speed of response and error ratios are taken into account instead of accuracy, AgCC patients are impaired comparatively to healthy controls (Lassonde, et al., 1988; Sauerwein and Lassonde, 1983). AgCC patients also have persistent deficits in bimanual coordination, characterized by slower performance and clumsiness (Chiarello, 1980; de Guise et al., 1999; Mueller et al., 2009).
Verbal learning and memory in agenesis of the corpus callosum
2014, NeuropsychologiaCitation Excerpt :Isolated AgCC results in a pattern of neuropsychological and social deficits. Starting with basic sensory-motor processes, individuals with complete and partial AgCC have mild to moderate difficulties on tasks necessitating bimanual coordination of motor movements (Jeeves, Silver, & Jacobson, 1988; Jeeves, Silver, & Milner, 1988; Mueller, Marion, Paul, & Brown, 2009) and on tachistoscopic tasks that assess interhemispheric transfer of complex sensory information (Brown, Jeeves, Dietrich, & Burnison, 1999; Imamura, Yamadori, Shiga, Sahara, & Abiko, 1994; Jeeves, 1979; Jeeves & Silver, 1988; Karnath, Schumacher, & Wallesch, 1991; Sauerwein & Lassonde, 1983). For example, Brown et al. (1999) showed that individuals with AgCC performed similar to controls when presented with bilateral single letter matching tasks, but showed a bilateral presentation disadvantage when the task required matching complex patterns that were novel and not easily verbalized.
How does the corpus callosum mediate interhemispheric transfer? A review
2011, Behavioural Brain ResearchCitation Excerpt :During brain development the brain undergoes reorganization by means of neural plasticity, allowing for compensatory mechanisms such as bilingual representations [25]. Callosal agenesis patients have also been shown to be capable of intra and interhemispheric transfer (although much slower), which has been attributed to extra callosal structures [35,36], and are therefore not considered in this review. The studies that have been described in this section highlight the importance of the corpus callosum in transfer and integration of sensory and cognitive information.