It most commonly occurs from injury, such as a motor vehicle collision, fall, sports accident, or self-harm.[1][4] Other causes may include low blood pressure or as a complication of angiography.[4] The underlying mechanism involve near or complete disruption through a level of the spinal cord.[1] Spinal shock is deemed to have resolved as reflexes return, despite the reflexes never returning to normal.[1] It generally lasts 4 to 12 weeks, after which spasticity occurs.[3]