The spelling of the word "Marchis tract" can be explained using IPA phonetic transcription. "Marchis" is pronounced /mɑrʃɪs/ with the "a" sound as in "marsh" and the "r" and "sh" sounds coming together smoothly. "Tract" is pronounced /trækt/ with the "a" sound as in "cat" and the "t" sound pronounced clearly at the end. "Marchis tract" is a term used in neuroscience to refer to a specific set of neurons in the spinal cord that are responsible for controlling voluntary movement.
Marchis tract refers to a white matter pathway located in the human brain, specifically within the frontal lobes. It is named after the Italian neurologist, Luigi Marchis, who is credited with discovering and describing this tract. The Marchis tract is classified as an associative tract and plays a significant role in connecting different parts of the brain involved in motor control and coordination.
This tract connects the premotor cortex with the primary motor cortex, which are both regions responsible for executing voluntary movements. More specifically, it connects the supplementary motor area (SMA) and the rostral part of the primary motor cortex. The Marchis tract serves as a crucial link between these regions, enabling the smooth execution of complex movements.
Within the Marchis tract, nerve fibers run from the supplementary motor area to the premotor cortex and extend further to the primary motor cortex. These fibers are organized in a way that facilitates the coordination and synchronization of motor activities between these brain regions. Therefore, any disruption or damage to the Marchis tract can potentially result in motor impairments, such as difficulties in initiating and coordinating movements.
In summary, the Marchis tract refers to a white matter pathway in the frontal lobes of the brain, connecting the supplementary motor area to the premotor cortex and primary motor cortex. Its function is crucial for motor control and coordination, and any abnormalities in this tract may lead to motor impairments.
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A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The term "Marchis tract" does not seem to have a widely recognized etymology. However, given the individual meanings of the two words, we can speculate about a possible origin.
"Marchis" is a Latin word that refers to a borderland or a frontier region. It originates from the Old High German word "marcha" and the Old English word "mearc", both having similar meanings. In historical context, "march" referred to a border area between two countries or territories.
"Tract" comes from the Latin word "tractus", meaning a stretch, region, or territory. It is related to the verb "trahere", which means "to draw" or "to pull". In English, "tract" often refers to a pamphlet or a written piece on a specific topic.