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Disorganised behavior is the production of inappropriate or bizarre behaviors, including gestures. These behaviors may be in response to environmental stimuli or may be entirely inappropriate for the situation.
Disorganized symptoms in general, and disorganised behaviors in particular, are not very well understood as it is common practice in research to group disorganised symptoms with other ‘positive’ symptoms such as hallucinations and delusions. This practice seriously limits our ability to determine the impacts of disorganised behaviors upon the sufferer.
The cognitive impacts of disorganised symptoms have been explored, to some extent, by Minor et al (2014) who has determined that disorganised symptoms may interfere with social cognition, such as emotional perception, neurocognition, such as memory and reasoning, and metacognition, used to determine the difference between the self and other people.
Research by Wegelius et al (2013) indicates that birth weight outside of the normal range, both higher or lower than normal, is predictive of disorganised behavior in individuals who later develop schizophrenia. When this symptom is present in individuals with schizophrenia it is also predictive of greater illness severity and reduced likelihood of remission (Oritz et al., 2015).
Beyond this, however, very little is known about the cause or impact of disorganized behavior.
References
Speculative Neuroscience 