Incidence:   There are an estimated 12,000 spinal cord injuries every year in the United States alone.  More than a quarter of a million Americans are currently living with spinal cord injuries. The cost of managing the care of spinal cord injury patients is $3 billion each year.

http://www.ninds.nih.gov/disorders/sci/detail_sci.htm

Medical Cannabis Indication:   Spinal Cord Injury with Spasticity

          Improves:  Neuropathic Pain, Quality of sleep, Muscle Relaxation,

                            Depression, Bladder Control

Recommended cannabinoid ratios:  

                     equal ratio THC: CBD (e.g. 1:1) 

                     high THC : low CBD (e.g. 20:1)

Dosing:  

Go slow and start dosing low and titrate until desired results are achieved.

 (Combination of  the above products may be required).  THC doses greater than 10mg/dose not recommended

Other:  

Neuroprotective properties may slow progression of disease.

Cannabinoid replacement therapy may reduce symptoms and prolong survival. 

(Please note that cannabinoid therapy is patient specific and may require dose/concentration adjustment. Please consult with your provider for appropriate therapy options.)

References: 

Journal Articles:

Treatments for Chronic Pain in Persons With Spinal Cord Injury: A Survey Study

The treatment of spasticity with 9-tetrahydrocannabinol in persons with spinal cord injury