Objective To study the effects of olfactory ensheathing cells (OECs) on the restoration of CSI in adult rats.Methods Spinal cord injury (SCI) animal models were set up by destroying corticospinal tract unilaterally by focal electrolytic lesions in the first and second cervical segment. OECs were primarily cultured. Then OECs suspension was injected into the lesion site in SCI rats. Incline plane experiments were made and motor evoked potentials (MEP-C) was recorded. Two weeks later, we measured the degree o...