Background: The aberrant pyramidal tract (APT) refers to the collateral pathway of the pyramidal tract (PT) through the medial lemniscus in the midbrain and pons. Using diffusion tensor tractography (DTT), we investigated the characteristics of the APT in comparison with the PT in the normal human brain. Results: In thirty-four (18.3%, right hemisphere: 20, left hemisphere: 14) of the 186 hemispheres, the APTs separated from the PT at the upper midbrain level, descended through the medial lemniscus from the midbrain to the pons, and then rejoined with the PT at the upper medulla. Nine (26.5%) of the 34 APTs were found to originate from the primary somatosensory cortex without a primary motor cortex origin. Values of fractional anisotropy (FA) and tract volume of the APT were lower than those of the PT (P < 0.05); however, no difference in mean diffusivity (MD) value was observed (P > 0.05). Conclusion: We found that the APT has different characteristics, including less directionality, fewer neural fibers, and less origin from the primary motor cortex than the PT.
机构:
Tel Aviv Univ, Dept Neurobiochem, Fac Life Sci, IL-69978 Tel Aviv, Israel
Tel Aviv Sourasky Med Ctr, Funct Brain Imaging Unit, IL-64239 Tel Aviv, IsraelTel Aviv Univ, Dept Neurobiochem, Fac Life Sci, IL-69978 Tel Aviv, Israel
Assaf, Yaniv
;
Pasternak, Ofer
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Tel Aviv Univ, Dept Comp Sci, Fac Exact Sci, IL-69978 Tel Aviv, IsraelTel Aviv Univ, Dept Neurobiochem, Fac Life Sci, IL-69978 Tel Aviv, Israel
机构:
Beth Israel Deaconess Med Ctr, Dept Neurol, Stroke Recovery Lab, Boston, MA 02215 USAHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Lindenberg, R.
;
Renga, V.
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Beth Israel Deaconess Med Ctr, Dept Neurol, Stroke Recovery Lab, Boston, MA 02215 USAHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Renga, V.
;
Zhu, L. L.
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Beth Israel Deaconess Med Ctr, Dept Neurol, Stroke Recovery Lab, Boston, MA 02215 USAHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Zhu, L. L.
;
Betzler, F.
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机构:
Beth Israel Deaconess Med Ctr, Dept Neurol, Stroke Recovery Lab, Boston, MA 02215 USA
Charite Univ Med Berlin, Dept Psychiat & Psychotherapy, Berlin, GermanyHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Betzler, F.
;
Alsop, D.
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Beth Israel Deaconess Med Ctr, Dept Radiol, Boston, MA 02215 USAHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Alsop, D.
;
Schlaug, G.
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Harvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Beth Israel Deaconess Med Ctr, Dept Neurol, Stroke Recovery Lab, Boston, MA 02215 USAHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
机构:
Tel Aviv Univ, Dept Neurobiochem, Fac Life Sci, IL-69978 Tel Aviv, Israel
Tel Aviv Sourasky Med Ctr, Funct Brain Imaging Unit, IL-64239 Tel Aviv, IsraelTel Aviv Univ, Dept Neurobiochem, Fac Life Sci, IL-69978 Tel Aviv, Israel
Assaf, Yaniv
;
Pasternak, Ofer
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h-index: 0
机构:
Tel Aviv Univ, Dept Comp Sci, Fac Exact Sci, IL-69978 Tel Aviv, IsraelTel Aviv Univ, Dept Neurobiochem, Fac Life Sci, IL-69978 Tel Aviv, Israel
机构:
Beth Israel Deaconess Med Ctr, Dept Neurol, Stroke Recovery Lab, Boston, MA 02215 USAHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Lindenberg, R.
;
Renga, V.
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h-index: 0
机构:
Beth Israel Deaconess Med Ctr, Dept Neurol, Stroke Recovery Lab, Boston, MA 02215 USAHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Renga, V.
;
Zhu, L. L.
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h-index: 0
机构:
Beth Israel Deaconess Med Ctr, Dept Neurol, Stroke Recovery Lab, Boston, MA 02215 USAHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Zhu, L. L.
;
Betzler, F.
论文数: 0引用数: 0
h-index: 0
机构:
Beth Israel Deaconess Med Ctr, Dept Neurol, Stroke Recovery Lab, Boston, MA 02215 USA
Charite Univ Med Berlin, Dept Psychiat & Psychotherapy, Berlin, GermanyHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Betzler, F.
;
Alsop, D.
论文数: 0引用数: 0
h-index: 0
机构:
Beth Israel Deaconess Med Ctr, Dept Radiol, Boston, MA 02215 USAHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Alsop, D.
;
Schlaug, G.
论文数: 0引用数: 0
h-index: 0
机构:
Harvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
Beth Israel Deaconess Med Ctr, Dept Neurol, Stroke Recovery Lab, Boston, MA 02215 USAHarvard Univ, Dept Neurol, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA