منابع مشابه
The Histological Evidences for Developmental Alternations in the Transmitting Time of Impulses along the Thalamocortical Tract
Change in transmitting time of impulses along axons is traditionally attributed to two parameters: the myelin formation and the diameter of neurite, both rising during the postnatal development. In the previous study, we showed that conduction velocity of the fibers projecting from the thalamus to the layer IV of the somatosensory (barrel) cortex increases as a function of age. However, the con...
متن کاملAberrant Pyramidal Tract in Comparison with Pyramidal Tract on Diffusion Tensor Tractography: A Mini-Review
The pyramidal tract (PT) is a major neural tract that controls voluntary movements in the human brain. The PT has several collateral pathways, including the aberrant pyramidal tract (APT), which passes through the medial lemniscus location at the midbrain and pons. Diffusion tensor tractography (DTT) allows visualization and estimation of the APT in three dimensions. In this mini-review, eight ...
متن کاملthe histological evidences for developmental alternations in the transmitting time of impulses along the thalamocortical tract
change in transmitting time of impulses along axons is traditionally attributed to two parameters: the myelin formation and the diameter of neurite, both rising during the postnatal development. in the previous study, we showed that conduction velocity of the fibers projecting from the thalamus to the layer iv of the somatosensory (barrel) cortex increases as a function of age. however, the con...
متن کاملPyramidal tract and bundle of Bagley in the goat.
In ungulates, very little is known about target areas of the fibers arising in the sensori-motor cortex. King" and Bagley", using the Marchi method, independently reported on projections from the cortical areas which they identified as motor areas by histological and/or electrophysiological methods. Besides the pyramidal tract, the latter author" described that a cortico-tegmental tract (bundle...
متن کاملAxon diameters and conduction velocities in the macaque pyramidal tract
Small axons far outnumber larger fibers in the corticospinal tract, but the function of these small axons remains poorly understood. This is because they are difficult to identify, and therefore their physiology remains obscure. To assess the extent of the mismatch between anatomic and physiological measures, we compared conduction time and velocity in a large number of macaque corticospinal ne...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1939
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1939.sp003798