anterior corticospinal tract การใช้

• The other 10 % of the fibers stay uncrossed in the anterior corticospinal tract.
• Today this bundle of fibers is usually called by its clinical name : the anterior corticospinal tract.
• The fibers that do not decussate will pass through the medulla and continue on to form the anterior corticospinal tracts.
• The rubrospinal tract descends with the lateral corticospinal tract, and the remaining three descend with the anterior corticospinal 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.
• 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 medical literature, the terms " T黵ck's bundle ", " T黵ck's column " and " T黵ck's tract " are also used for the anterior corticospinal tract.
• 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.
• A delta fibers ( A? fibers ) and C fibers carrying pain sensation in the spinothalamic tract contribute to this commissure, as do fibers of the anterior corticospinal tract, which carry motor signals from the primary motor cortex.
• The anterior corticospinal tract descends ipsilaterally in the anterior column, where the axons emerge and either synapse on lower ventromedial ( VM ) motor neurons in the ventral horn ipsilaterally or descussate at the anterior white commissure where they synapse on VM lower motor neurons contralaterally.