Hesperian Health Guides
Chapter 23: Spinal Cord Injury
The spinal cord is the line of nerves that comes out of the brain and runs down the backbone. From the cord, nerves go out to the whole body. Feeling and movement are controlled by messages that travel back and forth to the brain through the spinal cord. When the cord is injured, feeling and movement in the body below the level of the injury are lost or reduced.
Level of the injury
How much of the body is affected depends on the level of the injury along the backbone. The higher the injury is, the greater the area of the body that is affected.
Quadriplegia:
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Paraplegia:
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Complete and incomplete injuries
When the spinal cord is injured so completely that no nerve messages get through, the injury is said to be âcomplete.â Feeling and controlled movement below the level of the injury are completely and permanently lost. If the injury is âincomplete,â some feeling and movement may remain. Or feeling and controlled movement may return (partly or entirely) little by little during several months. In incomplete injuries, one side may have less feeling and movement than the other.
X-rays often do not show how complete a spinal cord injury is. Sometimes the backbone may be badly broken, yet the spinal cord injury may be minor. And sometimes (especially in children) the X-ray may show no injury to the backbone, yet the spinal cord injury may be severe or complete. Often, only time will tell how complete the injury is.