AN INVESTIGATION ON THE NERVE FIBERS OF EXTERNAL CAPSULE OF HUMAN BRAIN

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HAGHIR H.; SADEGHI Y.; MEHR-AEEN P.

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Journal: Researcher Bulletin of Medical Sciences Year:2000 | Volume:5 | Issue:2 (18) Page(s): 135-144

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Title

AN INVESTIGATION ON THE NERVE FIBERS OF EXTERNAL CAPSULE OF HUMAN BRAIN

Author(s)

HAGHIR H. | SADEGHI Y. | MEHR-AEEN P. | Issue Writer Certificate

Keywords

EXTERNAL CAPSULEQ4

KLINGLER'S TECHNIQUEQ4

PROJECTIONAL FIBERSQ4

ASSOCIATIONAL FIBERSQ4

COMMISSURAL FIBERSQ4

Abstract

Since little is known about the relations, courses, and connections of the white matter fibers of human cerebral hemispheres, and on the other hand, it is very important to increase our knowledge in this field for anatomical diagnosis of neurological diseases and improvement of neurosurgical techniques, therefore this study was performed. In this respect, one of the mysterious matters regarding white matter of the human cerebral hemispheres is nerve fibers of the EXTERNAL CAPSULE. Most of the reliable neuroanatomical texts present nothing or paradoxical matters about these fibers. For this reason, we decided to trace fibers in the EXTERNAL CAPSULE of human brains. For this purpose, 10 previously frozen, formalin-fixed human brains with no signs of cerebral diseases were dissected using KLINGLER'S TECHNIQUE. It was found out that the main components of EXTERNAL CAPSULE are those fibers from different parts of cortex which pass through the corona radiata and into the dorsal border of the EXTERNAL CAPSULE, and then continue in dorsoventral direction and pass through or from beneath the lentiform nucleus into cerebral peduncle and finally terminate in midbrain tegmentum. These fibers give off branches in their course to the striatum and some fibers from the corpus callosum enter the EXTERNAL CAPSULE. In addition, some fibers from anterior commissure terminate in the EXTERNAL CAPSULE. The superior longitudinal fasciculus lies along the dorsal border of EXTERNAL CAPSULE and the fibers pass through between the two systems. addition, inferior longitudinal fasciculus, uncinate fasciculus, and occipitofrontal fasciculus pass through the ventral portion of EXTERNAL CAPSULE. These findings demonstrate that the EXTERNAL CAPSULE contains all of the three types of fibers (projectional, associational, and commissural). This conclusion denies the previous beliefs on EXTERNAL CAPSULE that suggested its fibers are exclusively of a projectional and/or associational type.

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APA: Copy

HAGHIR, H., SADEGHI, Y., & MEHR-AEEN, P.. (2000). AN INVESTIGATION ON THE NERVE FIBERS OF EXTERNAL CAPSULE OF HUMAN BRAIN. RESEARCHER BULLETIN OF MEDICAL SCIENCES (PEJOUHANDEH), 5(2 (18)), 135-144. SID. https://sid.ir/paper/18236/en

Vancouver: Copy

HAGHIR H., SADEGHI Y., MEHR-AEEN P.. AN INVESTIGATION ON THE NERVE FIBERS OF EXTERNAL CAPSULE OF HUMAN BRAIN. RESEARCHER BULLETIN OF MEDICAL SCIENCES (PEJOUHANDEH)[Internet]. 2000;5(2 (18)):135-144. Available from: https://sid.ir/paper/18236/en

IEEE: Copy

H. HAGHIR, Y. SADEGHI, and P. MEHR-AEEN, “AN INVESTIGATION ON THE NERVE FIBERS OF EXTERNAL CAPSULE OF HUMAN BRAIN,” RESEARCHER BULLETIN OF MEDICAL SCIENCES (PEJOUHANDEH), vol. 5, no. 2 (18), pp. 135–144, 2000, [Online]. Available: https://sid.ir/paper/18236/en

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