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Impulse Control 
Refers to the individual's ability to withhold inappropriate verbal or motor responses while completing a task. Persons who act or speak without first considering the consequences are viewed as having poor impulse control. 

Incontinent 
Inability to control bowel and bladder functions. Many people who are incontinent can become continent with training. 

Initiative 
Refers to the individual's ability to begin a series of behaviors directed toward a goal. 

Interdisciplinary Approach 
A method of diagnosis, evaluation, and individual program planning in which two or more specialists, such as medical doctors, psychologists, recreational therapists, social workers, etc., participate as a team, contributing their skills, competencies, insights, and perspectives to focus on identifying the developmental needs of the person with a disability and on devising ways to meet those needs. 

Intracranial Pressure (ICP) 
Cerebrospinal fluid (CSF) pressure measured from a needle or bolt introduced into the CSF space surrounding the brain. It reflects the pressure inside of the skull.