Distribution of the corticobulbar tract in the internal capsule

Yim, Soo Hwan; Han, Zee-A; Jeon, Seun; Cho, Jeong Hee; Kim, Gyu Sik; Choi, Sun-Ah; Lee, Jun Hong

doi:10.1016/j.jns.2013.07.015

Cited by 36 publications

(38 citation statements)

References 15 publications

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“…Several studies have reported on the CBT in the human brain, using DTI [5,11,13,17,20]. Among these studies, two studies reported on the anatomical location of the CBT in the internal capsule [11,13,20].…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Recent studies have reported on methods for identification and reconstruction of the CBT in the human brain, using DTT [11,13,20]. Two studies demonstrated the anatomical location of the CBT in the internal capsule [13,20]. However, no study has reported on the anatomical location of the corona radiata (CR), an area known for high rate stroke and traumatic brain injury, as well as poor motor outcome [4,10,15].…”

Section: Introductionmentioning

confidence: 99%

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The anatomical location of the corticobulbar tract at the corona radiata in the human brain: Diffusion tensor tractography study

Jang

Seo

2015

Neuroscience Letters

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The anatomical location of the corticobulbar tract at the corona radiata in the human brain: Diffusion tensor tractography study

Jang

Seo

2015

Neuroscience Letters

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“…Yim et al. (2013) suggested that the corticobulbar tracts pass through the median of the PLIC instead of the genu. Moreover, they calculated the ratio of the lesion compared with the PLIC and found that the most overlapping area was the median of the PLIC.…”

Section: Discussionmentioning

confidence: 99%

Internal capsule: The homunculus distribution in the posterior limb

Qian

Tan

2017

Brain and Behavior

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IntroductionIn our experience, sometimes, the symptom of patients who suffered from infarction in internal capsule (IC) do not necessarily fit the classical fiber distribution. This study aims to explain this phenomenon.Methods and MaterialsA total of 34 patients with infarction lesions in the IC were included in this study, according to the clinical symptom, divided into three groups, group A (more severe weakness of the foot than the hand), group B (more severe weakness of the hand than the foot) and group C (equal weakness of hand and foot), and group Y (with facial nerve paresis) and group N (without facial nerve paresis). Measurements included the length ratio and the angle degree of infarction lesions compared with the posterior limb of the IC (PLIC).ResultsThe length ratio of infarction lesions is significant difference between group A and group B (p = .027), the angle degree of infarction lesions is significant difference between group Y and group N (p = .038).ConclusionFrom our results, we can conclude that the hand fibers are located laterally to foot fibers in the short axis of the posterior limb of the IC, and the face fibers are located in the premedial part of the posterior limb of the internal capsule.

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“…Recent studies have used DW-MRI techniques to map the course of the adult corticobulbar tract (Akter et al 2011;Pan et al 2012;Yim et al 2013), the direct motor pathways controlling the cranial nerves responsible for articulation. However, none of these studies examined the hemispheric asymmetry of diffusion metrics.…”

Section: Introductionmentioning

confidence: 99%

Anatomy and lateralization of the human corticobulbar tracts: an fMRI-guided tractography study

et al. 2015

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The left hemisphere lateralization bias for language functions, such as syntactic processing and semantic retrieval, is well known. Although several theories and clinical data indicate a link between speech motor execution and language, the functional and structural brain lateralization for these functions has never been examined concomitantly in the same individuals. Here, we used functional MRI during rapid silent syllable repetition (/lalala/, /papapa/ and /pataka/, known as oral diadochokinesis or DDK) to map the cortical representation of the articulators in 17 healthy adults. In these same participants, functional lateralization for language production was assessed using the well-established verb generation task. We then used DDK-related fMRI activation clusters to guide tractography of the corticobulbar tract from diffusion-weighted MRI. Functional MRI revealed a wide inter-individual variability of hemispheric asymmetry patterns (left and right dominant, as well as bilateral) for DDK in the motor cortex, despite predominantly left hemisphere dominance for language-related activity in Broca's area. Tractography revealed no evidence for structural asymmetry (based on fractional anisotropy) within the corticobulbar tract. To our knowledge, this study is the first to reveal that motor brain activation for syllable repetition is unrelated to functional asymmetry for language production in adult humans. In addition, we found no evidence that the human corticobulbar tract is an asymmetric white matter pathway. We suggest that the predominance of dysarthria following left hemisphere infarct is probably a consequence of disrupted feedback or input from left hemisphere language and speech planning regions, rather than structural asymmetry of the corticobulbar tract itself.

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Distribution of the corticobulbar tract in the internal capsule

Cited by 36 publications

References 15 publications

The anatomical location of the corticobulbar tract at the corona radiata in the human brain: Diffusion tensor tractography study

The anatomical location of the corticobulbar tract at the corona radiata in the human brain: Diffusion tensor tractography study

Internal capsule: The homunculus distribution in the posterior limb

Anatomy and lateralization of the human corticobulbar tracts: an fMRI-guided tractography study

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