pyramidal system

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Related to corticospinal tract: Lateral corticospinal tract, Anterior corticospinal tract

pyramidal system

[¦pir·ə¦mid·əl ′sis·təm]
(anatomy)
The corticospinal and corticobulbar tracts.
References in periodicals archive ?
It has been suggested that this method is not sensitive enough, as subtle deficits in the corticospinal tract, which may result in postoperative motor deficits, may not be detected.
A definitive study would require prospective imaging using stateof-the-art MRI techniques to quantitate damage to the ahPCG, the arm-hand premotor cortex, and the posterior PVWM in relation to the established trajectory of the corticospinal tract.
The fibers that decussate are called the lateral corticospinal tract or the lateral pyramidal tract.
The multiple-ROI method allows discrete visualization of known anatomic tracts that pass through high-branching areas, such as the corticospinal tract as it passes through the brainstem, at the expense of nonvisualization of any associated branching tracts.
One member of this family, EphA4, is involved in the development of one of the major descending pathways in the spinal cord--the corticospinal tract (CST).
5 times more corticospinal tract neurons near the lesion site as compared to controls.
Although the cause of ALS is not known, preclinical studies have indicated several potential mechanisms which may be responsible for the motor neuron atrophy and degeneration of the corticospinal tract that occurs in ALS.
In the present study a hemi-transection of the corticospinal tract was made in rats and Inosine was administered to the motor cortex that gave rise to the transected fibers.