Spinal cord injuries disrupt the communication pathway between the brain and the body. When a specific segment of the spinal cord is damaged, all segments below the point of injury are disconnected from the brain, leading to paralysis. The nature of the paralysis and reflex activity can vary; complete severance may cause flaccid paralysis and a loss of reflexes, whereas injuries where the tissue remains intact can lead to abnormally strong reflexes due to the loss of inhibitory signals from the brain.