เข้าสู่ระบบ สมัครสมาชิก
มากกว่า

lateral corticospinal tract การใช้

ประโยคมือถือ
  • They then descend as the lateral corticospinal tract.
  • This tract descends in the lateral white column anterior to the lateral corticospinal tract.
  • There is no decussation in the lateral corticospinal tract after the decussation at the medullary pyramids.
  • After crossing over to the contralateral side in the medulla oblongata ( lateral corticospinal tract ".
  • There are two divisions of the corticospinal tract, the lateral corticospinal tract and the ventral corticospinal tract.
  • The lateral corticospinal tract neurons cross the midline in the spinal cord, and controls the limbs and digits.
  • The rubrospinal tract descends with the lateral corticospinal tract, and the remaining three descend with the anterior corticospinal tract.
  • These motor pathways, including the lateral corticospinal tract, are located in the lateral and ventral funiculi of the spinal cord.
  • Having crossed over at the middle line, they pass down in the posterior part of the lateral funiculus as the lateral corticospinal tract.
  • The function of lower motor neurons can be divided into two different groups : the lateral corticospinal tract and the anterior cortical spinal tract.
  • The fibers that decussated will go down the lateral corticospinal tract while the fibers that did not decussate will travel down the anterior corticospinal tract.
  • Nearly 90 percent of the fibers decussate and travel down the lateral corticospinal tract while the other 10 percent travels down the anterior corticospinal tract.
  • Nerve axons of the lateral corticospinal tract that did not cross over in the medulla do so at the level of the spinal cord they terminate in.
  • For example, spinal cord damage on the left side of the lateral corticospinal tract at the thoracic level can cause motor deficits to the left side of the body.
  • In contrast to the lateral corticospinal tract which controls the movement of the limbs, the anterior corticospinal tract controls the movements of axial muscles ( of the trunk ).
  • In contrast to the fibers for the lateral corticospinal tract, the fibers for the anterior corticospinal tract do not decussate at the level of the medulla oblongata, although they do cross over in the spinal level they innervate.
  • The fibers of the upper motor neurons project out of the precentral gyrus ending in the brainstem, where they will decussate ( intersect ) within the lower medulla oblongata to form the lateral corticospinal tract on each side of the spinal cord.