ASIA Impairment Scale


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Related to ASIA Impairment Scale: Spinal shock

ASIA Impairment Scale

A method of assessing the degree of motor and sensory impairment in spinal cord injured patients. The assessment is based on an examination of the perineum and anus, i.e., on the S4-S5 level of the spinal cord. Grade: A – Complete: No motor or sensory function; Grade B – Incomplete, sensory function is intact, but motor function is absent below and including the S4-S5 level; Grade C – Incomplete, motor function is preserved below the neurological level and more than half of the primary muscles have a muscle grade test of less than 3; Grade D – Incomplete: Motor function is preserved and at least half of the muscles below the S4-S5 level have a muscle grade test of 3 or better; and Grade E – Normal.
See also: scale
References in periodicals archive ?
The extent of SCI is categorized by the ASIA impairment scales in which A refers to a complete injury in which no sensory or motor function is preserved in sacral segments S4-S5, B denotes an incomplete injury in which sensory, but not motor, function is preserved below the neurologic level and extends through sacral segments S4-S5, C signifies an incomplete injury in which motor function is preserved below the neurologic level, and most key muscles below the neurologic level have muscle grade less than 3/5, D depicts an incomplete injury in which motor function is preserved below the neurologic level, and most key muscles below the neurologic level have muscle grade greater than or equal to 3/5, and E means that sensory and motor functions are normal4.
The patient has progressed from a complete ASIA Impairment Scale (AIS) A injury to an incomplete AIS B injury.
17) (Table 2) or to the completeness of the lesion as per ASIA Impairment Scale score (p = 0.

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