The anterior corticospinal tract is a bundle of nerve fibers that originates in the motor cortex of the brain. It plays a crucial role in controlling voluntary movements, particularly those involving the trunk and proximal muscles. This tract descends through the brainstem and spinal cord, where it primarily influences motor neurons in the cervical and upper thoracic regions. Unlike the lateral corticospinal tract, which crosses over to the opposite side of the body, the anterior corticospinal tract remains mostly uncrossed until it reaches the spinal cord. This pathway is essential for maintaining posture and coordinating movements of the upper limbs and torso.