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Motor System

Last Updated: September 27, 2018

ASIA Impairment Scale
Assessment scale for neurologic impairment after SCI
Grade Description Characteristics of Impairment
A Complete No sensory or motor function preserved
B Incomplete Sensory but no motor function preserved below injury level
C Incomplete Motor function preserved but majority of muscles below neurologic level have muscle grade <3
D Incomplete Motor function preserved but majority of muscles below neurologic level have muscle grade ≥3
E Normal Motor and sensory function normal
House-Brackmann Grade
Standardized scale for degree of facial nerve paralysis
Grade Description Characteristics
I Normal Normal facial function in all areas
II Mild Dysfunction Slight weakness and asymmetry on close inspection
III Moderate Dysfunction Obvious but not disfiguring asymmetry
IV Moderate-Severe Dysfunction Obvious weakness and/or disfiguring asymmetry
V Severe Barely perceptible motion
VI Total Paralysis No contraction
Frankel Function Grade
Grading patient functionality below level of SCI lesion
Grade Description Characteristics
A Complete dysfunction Both motor and sensory loss below injury level
B Sensory only Complete motor paralysis with preserved sensation below injury level
C Incomplete motor function Motor function present but of no practical use below injury level
D Fair motor function Motor function present with practical use below injury level
E Normal function / Recovery Free of neurologic symptoms

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