<prompt> Most common type of injury to spinal cord is -FlexionExtensionCompressionFlexion - rotation  <response>: Flexion injury is the commonest spinal injury , e.g: 1.heavy blow across the shoulder by a heavy object 2.fall from height on heels buttocks results : in cervical spine fkexion force results in 1. A sprain of ligaments muscles of the back of the neck . 2.compression fracture of veebral body c5- c7 . 3. Dislocation of one veebra over another commonest c5 over c6 . In dorso- lumbar spine , this force can result in the wedge compression of a veebra L1 commonest ,followed by L2 T12.It is a stable injury if compression of the veebra is less than 50 of its posterior height. flexion - rotation injury is associated with high incidence of neurological damage, as it leaves a highly unstable spine extension injury is commonly seen in cervical spine .It results in a chip fracture of the anterior rim of a veebra. Sometimes these injury may be unstable. compression injury is also common .it results in burst fracture in cervical spine. REF : essential ohopedics , Maheshwari, 9th edition ,pg.no.257 