Cross paralysis is defined as peripheral cerebral nerve palsy on the side of the lesion and central paralysis of the contralateral limb. Crossing paralysis is usually seen in brainstem injuries. The brainstem includes the midbrain, pons, and medulla oblongata. The presentation varies depending on the location of the injury. If one side of the midbrain is damaged and the motor nerve distributed there is involved, ptosis and exotropia may occur on the same side. It may also be accompanied by paralysis of the opposite side of the limbs. If the cerebral bridge is damaged and the facial nerve is involved, paralysis of the facial muscles on the same side will occur. In addition, hemiparesis may occur due to damage to the pons, which affects the pyramidal tract, which crosses over to the opposite side in the lower medulla oblongata. If you feel unwell, please seek medical attention.