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This type of descending motor pathway originates in the brainstem and governs automatic movements that help regulate muscle tone, posture and balance.
Contents. 1  Overview. 2  Group of Neurons Forming Tracts. 3  Position of the Ascending Tracts. 4  Fasciculi Gracilis & Cuneatus Types of Fibers. Fasciculus Gracilis. 5  Spinothalamic Tracts Characteristics. Lateral Spinothalamic Tract. 6  Spinocerebellar Tract Posterior Spinocerebellar Tract. Anterior Spinocerebellar Tract. 7  Spinotectal Tract. 8  Spinoreticular Tract.