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Structure Divisions of the Nervous System
- Central Nervous System(CNS)
- Peripheral Nervous System
- Voluntary Nervous System
Spinal Column(Vertebral Column)
The 33 vertebrae that enclose and protect the spinal cord
- Bony segments of the spinal column
- Body of a vertebra is the bulky portion that faces anteriorly in the spinal column
- Fluid-filled cartilage pad between vertebrae.
- Shock absorber
The first seven vertebrae; the neck
The 12 vertebrae that compromise the upper back.
The 5 vertebrae that from the lower back
The 5 fused vertebrae at the posterior pelvis
The 4 fused vertebrae that form the lower end of the spine; the tailbone
- Nervous tissue that extends from the brain to level L2 within spinal column
- The motor tracts carry impulses down the spinal cord and out to the muscles.
- Pain tracts carry impulses from pain receptors up the spinal cord to the brain
- Light touch tracts are tested by applying light touch to the patient.
Spinal Column Injury
An injury to one or more vertebrae
Spinal Cord injury
Damage to the nervous tissue of the spinal cord
Complete Spinal Cord Injury
Spinal cord injury causing complete loss of motor, sensory, and autonomic function below the level of injury
Paralysis, loss of sensation, and possible vasodilation caused by spinal cord injury
A persistent erection of the penis
Vasodilation and relative hypovolemia caused by spinal cord injury
Incomplete Spinal Cord Injury
Injury to some but not all spinal cord tracts so that some functions are lost and some are intact.
Central Cord Syndrome
Loss of function in upper extremities from central cord injury
Anterior Cord Syndrome
Loss of most function below site of anterior cord injury
Loss of different functions on opposite sides of the body from injury to one side of the spinal cord