betz cell वाक्य
उदाहरण वाक्य
मोबाइल
- Atrophy of Betz cells and corticospinal tracts constitute a second lesion.
- The Betz cells are rare or absent in the adjacent cortex.
- The Betz cells account for only a small percentage of the corticospinal tract.
- The primary motor cortex contains cells with giant cell bodies known as " Betz cells ".
- This region of cortex, characterized by the presence of Betz cells, was termed area 4 by Brodmann.
- Even when the Betz cells are damaged, the cortex can still communicate to subcortical motor structures and control movement.
- The location of the primary motor cortex is most obvious on histological examination due to the presence of the distinctive Betz cells.
- Layer V of the primary motor cortex contains giant ( 70-100 �m ) pyramidal neurons which are the Betz cells.
- The " Betz cells "'along with their long axons are referred to as the upper motor neuron ( UMN ).
- The corticospinal tract also contains Betz cells ( the largest pyramidal cells ), which are not found in any other region of the body.
- Though the Betz cells do not compose the entire motor output of the cortex, they nonetheless provide a clear marker for the primary motor cortex.
- If the primary motor cortex with its Betz cells is damaged, a temporary paralysis results and other cortical areas can evidently take over some of the lost function.
- About 3 % of nerve axons have a much larger diameter ( 16?m ) and arise from Betz cells, mostly in the leg area of the primary motor cortex.
- First, the primary motor cortex contains giant pyramidal cells called Betz cells in layer V, whereas giant pyramidal cells are less common and smaller in the premotor cortex.
- In 1874, Vladimir Alekseyevich described the giant pyramidal neurons in the primary motor cortex, which later were named " Betz cells " . < ! --
- The Betz cells, or giant pyramidal cells in the primary motor cortex, are sometimes mistaken to be the only or main output from the cortex to the spinal cord.
- Betz cells are very large cells that are very visible under a microscope, and while they account for only about 5 % of cells projecting to the spinal cord, they are often considered most crucial for communication of motor signals.
- Yet the Betz cells compose only about 2-3 % of the neurons that project from the cortex to the spinal cord, and only about 10 % of the neurons that project specifically from the primary motor cortex to the spinal cord.
- The " internal pyramidal layer ( layer V ) " of the precentral pyramidal neurons " ( a . k . a . " Betz cells " ), which send long axons to the contralateral motor nuclei of the cranial nerves and to the lower motor neurons in the ventral horn of the spinal cord.
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