<prompt> True about lateral coicospinal tract:CrossedUncrossedStops in midthoracic regionCrossed at midspinal level  <response>: A i.e. CrossedCoicospinal Pyramidal tractIt originates from primary motor coex 30, premotor supplementary motor area 30 and sornatosensory areas posterior to central sulcus 40It passes through posterior limb of internal capsule bw caudate nucleus putamen of basal ganglia and then form pyramid of medulla.Lateral coicospinal tract LCT- 80 of fibers of pyramidal tract cross in lower medulla0 to opposite side form LCT.Concerned with skilled movements and ends directly on motor neurons in humans Ganong.But according to Guyton fibers finally terminate on interneurons in intermediate regions of cord gray matter most sensory rely neurons in dorsal horn few directly on anterior motor neurons that cause muscle contraction very few.AnteriorVentral - coicospinal tract20 fibers do not cross to opposite side in medullaDo not cross the middle until it reaches the level of muscles it controls. At this level fiber ends on inter neuron that is connected to motor neuron of both sides of body Ganong Many if not most fibers cross to opposite side of body either in neck or in upper thoracic region Guyton; and are concerned with control of bilateral postural movements by supplementary motor coex.Large myelinated fibers originating from giant pyramidal Betz cells found only in primary motor coex are most impressive fibers in pyramidal tract. Diameter of cell is 60 p m of fiber is 16 p m micrometer with a conduction velocity of 70 msec. most rapid transmission from brain to cord. Total fibers in pyramidal tract is 1 million, of which 3 34,000 are from Betz cells. Remaining 97 fibers are 4 p in diameter. 