GENERAL HISTOLOGY

Detailed explanation-1: -The extent of spinal cord injury (SCI) is defined by the American Spinal Injury Association (ASIA) Impairment Scale (modified from the Frankel classification), using the following categories [1, 2, 3, 4, 5] : A = Complete: No sensory or motor function is preserved in sacral segments S4-S5.

Detailed explanation-2: -Grade A: The impairment is complete. There is no motor or sensory function left below the level of injury.

Detailed explanation-3: -Classification of Spinal Cord Injury Severity First, instead of no function below the injury level, ASIA A is defined as a person with no motor or sensory function preserved in the sacral segments S4-S5. This definition is clear and unambiguous.

Detailed explanation-4: -The American Spinal Injury Association (ASIA) impairment scale or AIS describes a person’s functional impairment as a result of a SCI. This scale indicates how much sensation a person feels after light touch and a pin prick at multiple points on the body and tests key motions on both sides of the body.

Detailed explanation-5: -ASIA D = Motor Incomplete. Motor function is preserved below the neurological level and at least half (half or more) of key muscle functions below the neurological level of injury have a muscle grade greater than 3. ASIA E = Normal.