ICD NOS includes other significant difficulties that seem to be related to impulsivity but do not meet the criteria for a specific DSM diagnosis.There has been much debate over whether or not the ICDs deserve a diagnostic category of their own, or whether they are in fact phenomenologically and epidemiologically related to other major psychiatric conditions like obsessive-compulsive disorder (OCD), affective disorders, and addictive disorders. In fact, the ICD classification is likely to change with the release of the DSM-V in May 2013. In this new revision the ICD NOS will likely be reduced or removed; proposed revisions include reclassifying trichotillomania (to be renamed hair-pulling disorder) and skin-picking disorder as obsessive-compulsive and related disorders, moving intermittent explosive disorder under the diagnostic heading of disruptive, impulse control, and conduct disorders, and gambling disorder may be included in addiction and related disorders.The role of impulsivity in the ICDs varies. Research on kleptomania and pyromania is lacking, though there is some evidence that greater kleptomania severity is tied to poor executive functioning.Trichotillomania and skin-picking disorder seem to be disorders that primarily involve motor impulsivity, and will likely be classified in the DSM-V within the obsessive-compulsive and related disorders category.Pathological gambling, in contrast, seems to involve many diverse aspects of impulsivity and abnormal reward circuitry  (similar to substance use disorders) that has led to it being increasingly conceptualized as a non-substance or behavioral addiction.
The rationale behind the use of behavioral measures like the Stop signal task is that "go" processes and "stop processes" are independent, and that, upon "go" and "stop" cues, they "race" against each other; if the go process wins the race, the prepotent response is executed, whereas if the stop processes wins the race, the response is withheld. In this context, impulsivity is conceptualized as a relatively slow stop process. The brain regions involved in behavioral inhibition appear to be the lateral and orbital prefrontal regions along with premotor processes. Oculomotor Inhibition
Oculomotor Inhibition is the effortful suppression of reflexive saccade.Oculomotor inhibition is tested using antisaccade and oculomotor tasks. Also, the Rothbart effortful control measure and the Big Five Conscientiousness dimension are thought to tap some of the effortful processes underlying the ability to suppress saccade. The frontal eye fields and the dorsolateral prefrontal cortex are involved in oculomotor inhibition. Motivational inhibition
In response to punishment
Motivational inhibition and response in the face of punishment can be measured using tasks tapping inhibition of primary response, modified go/no go tasks, inhibition of competing response, and emotional Stroop tasks. Personality psychologists also use the Gray behavioral inhibition system measure, the Eysenck scale for neurotic introversion, and the Zuckerman Neuroticism-Anxiety scale. The  Septal-hippocampal formation, cingulate, and motor systems seem to be the brain areas most involved in response to punishment. In response to novelty
Response to novelty has been measured using the Kagan behavioral inhibition system measure and scales of neurotic introversion. The amygdaloid system is implicated in novelty response.