How does the corpus callosum mediate interhemispheric transfer? A review

Knaap, Lisette J. van der; Ham, Ineke J. M. van der

doi:10.1016/j.bbr.2011.04.018

Cited by 395 publications

(255 citation statements)

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“…This might attributed to bilateral arm training is a good method of increasing the neural connection and integration which is a part of the neural plasticity and motor learning. This is agreed by [18,19]. Ameli et al( 2009) explained the physiological effect of bilateral arm training which might explain why patients in group two of our study showed significant improvement in hand performance and decreasing in the time of motor performance.…”

Section: Discussionsupporting

confidence: 85%

Effect of Weighted Hand Movements on Hand Function in Chronic Stroke Patients

Zakaria¹,

Ragab²,

Ali³

2017

IJPR

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Background: Hand dysfunction is a common problem of stroke patients and it is the main cause of impairment of the upper limb. Finding new method to improve hand performance will decrease the disability of chronic stroke patients.Aim of the study: to study the effect of bilateral hand training with weight on the non paretic hand on the hand performance and time of performance in chronic stroke patients. Materials and Methods:Thirty left chronic stroke patients participated in this study. The patients were assigned randomly into two equal groups. Group one (G1) received unilateral hand training and group two (G2) received bilateral hand training with weight on non affected hand. Both groups assessed two times before starting training program and after two months of training by Fugl meyer assessment scale, Wolf motor function test and hand dynamometer for the motor performance, time of performance and hand grip respectively.Results: the patients in G2 showed significant improvement in the hand performance (P<.0001) and significant decrease in the time of performance (P<.001) and also significant improvement of hand grip (P<.0001). Conclusion:Bilateral hand movement with weight on the non affected hand has a significant effect on improving hand performance and decreasing the time of performance and increasing hand grip than unilateral hand movement.

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Section: Discussionsupporting

confidence: 85%

Effect of Weighted Hand Movements on Hand Function in Chronic Stroke Patients

Zakaria¹,

Ragab²,

Ali³

2017

IJPR

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“…Interestingly, we found no differences in CC size between the two groups of newborns in our study. The CC was chosen as a control region because of its central location and global role in interhemispheric communication, connecting the auditory areas between the two hemispheres (88). In addition, because the size of the CC is known to correlate with overall brain volume, we assumed that the CC may have a good predictive value for experiencedependent changes of global brain growth (89).…”

Section: Discussionmentioning

confidence: 99%

Mother’s voice and heartbeat sounds elicit auditory plasticity in the human brain before full gestation

Webb¹,

Heller

Benson

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

184

106

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Brain development is largely shaped by early sensory experience. However, it is currently unknown whether, how early, and to what extent the newborn's brain is shaped by exposure to maternal sounds when the brain is most sensitive to early life programming. The present study examined this question in 40 infants born extremely prematurely (between 25-and 32-wk gestation) in the first month of life. Newborns were randomized to receive auditory enrichment in the form of audio recordings of maternal sounds (including their mother's voice and heartbeat) or routine exposure to hospital environmental noise. The groups were otherwise medically and demographically comparable. Cranial ultrasonography measurements were obtained at 30 ± 3 d of life. Results show that newborns exposed to maternal sounds had a significantly larger auditory cortex (AC) bilaterally compared with control newborns receiving standard care. The magnitude of the right and left AC thickness was significantly correlated with gestational age but not with the duration of sound exposure. Measurements of head circumference and the widths of the frontal horn (FH) and the corpus callosum (CC) were not significantly different between the two groups. This study provides evidence for experience-dependent plasticity in the primary AC before the brain has reached full-term maturation. Our results demonstrate that despite the immaturity of the auditory pathways, the AC is more adaptive to maternal sounds than environmental noise. Further studies are needed to better understand the neural processes underlying this early brain plasticity and its functional implications for future hearing and language development. auditory | brain | mother's voice | heartbeat | preterm newborns

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“…Although, this commissure has proven to be an important structure in the human brain, it is possible to live without this white matter structure (van der Knaap & van der Ham, 2011). The corpus callosum consists mainly of myelinated axons of various sizes (Griffiths et al, 2009), a certain amount of nonmyelinated fibers (Tomasch, 1954), neuralgial cells and a certain number of blood vessels that connect the homologous regions of cerebral cortex of both hemispheres (Griffiths et al, 2009) from the anterior commissure anteriorly to the hippocampal commissure posteriorly (Raybaud, 2010).…”

Section: Anatomy Of the Corpus Callosummentioning

confidence: 99%

“…In regard to callosal size and width, most of the articles have shown that callosal size to be directly related to the number of interhemispheric connections (Bloom & Hynd, 2005) and vary between individuals and between sexes (Luders et al, 2010;Aboitiz et al, 1992;Junle et al, 2008;Clarke & Zaidel, 1994;Hasan et al, 2008). Additionally, Age related thinning of the corpus callosum is often reported (van der Knaap & van der Ham, 2011), however, these findings are still controversial.…”

Section: Anatomy Of the Corpus Callosummentioning

confidence: 99%