Document Detail

Distribution of the corticobulbar tract in the internal capsule.
MedLine Citation:
PMID:  24034408     Owner:  NLM     Status:  Publisher    
It is generally thought that the corticobulbar tract descends through the genu of the internal capsule (IC). There have been several reports that genu lesions cause bulbar symptoms such as facial palsies, dysarthria, and dysphagia. However, the precise location of the corticobulbar tract in the IC remains controversial. The purpose of our study is to assess whether the corticobulbar tract passes through the IC genu. We reviewed 26 patients with selective IC infarction and located the sites related to bulbar symptoms. In addition, using diffusion tensor imaging, we reconstructed tracts passing through the IC in ten subjects without cerebral infarction. Patients with genu infarction, which extended to more than half of the posterior limb of the IC, showed bulbar symptoms. However, patients with genu infarction, which was limited to the genu, did not have bulbar symptoms. In contrast, patients with lesions limited to the posterior limb may show bulbar symptoms. According to statistical maps of the region of interest, the lesions related to bulbar symptoms were localized to areas that were beyond the midpoint of the posterior limb of the IC. In diffusion tensor imaging of subjects without cerebral infarctions, the corticobulbar and corticospinal tracts did not pass through the IC genu. Our data provide evidence that the corticobulbar tract does not pass through the IC genu. The proposed location of the corticobulbar tract in the level of the IC lies beyond the midpoint of the posterior limb.
Soo Hwan Yim; Jong Hun Kim; Zee-A Han; Seun Jeon; Jeong Hee Cho; Gyu Sik Kim; Sun-Ah Choi; Jun Hong Lee
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-7-31
Journal Detail:
Title:  Journal of the neurological sciences     Volume:  -     ISSN:  1878-5883     ISO Abbreviation:  J. Neurol. Sci.     Publication Date:  2013 Jul 
Date Detail:
Created Date:  2013-9-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375403     Medline TA:  J Neurol Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2013.
Department of Neurology, National Health Insurance Corporation Ilsan Hospital, Goyang-Shi, South Korea; Department of Neurology, Yonsei University College of Medicine, Seoul, South Korea.
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