Table 1.

Disablement Concepts and Definitions

Nagi	ICF
Active pathology—interruption or interference with normal processes, and effort of the organism to regain normal state	Health conditions—diseases, disorders, and injuries
Impairment—anatomical, physiological, mental, or emotional abnormalities	Body function—physiological functions of body systems
	Body structures—anatomical parts of the body
	Impairments—problems in body functions or structure
Functional limitation–limitation in performance at the level of the whole organism or person	Activity—the execution of a task or action by an individual
	Activity limitation—difficulties an individual may have in executing activities
Disability—limitation in performance of socially defined roles and tasks within a sociocultural and physical environment	Participation—involvement in a life situation
	Participation restriction—problems an individual may experience in involvement in life situations

Note: ICF = International Classification of Function, Disability, and Health.