Have you ever thought your friend’s or partner’s outfit was unflattering, but rather than expressing your opinion, you kept it to yourself? If so, your inhibition did its job by preventing you from sharing your real thoughts due to an important filter. Unfortunately, when it comes to brain injuries, especially traumatic brain injuries (TBI), individuals with disinhibition (the loss of inhibition) caused by this type of injury wouldn’t have that type of filter.

Following a TBI, stroke, or other brain injury, neurological damage can occur, and it can result in various cognitive, physical, and neurobehavioral changes, which vary based on a patient’s specific brain injury and state of neurological health. Oftentimes, personality and behavioral changes occur following brain trauma, and it’s not uncommon for one’s inhibition to no longer exist.

The National Institutes of Health (NIH) describes neurobehavioral disinhibition as “a singular multiproblem dimension involving lack of behavior control and poor emotional modulation that has features of disruptive behavior disorders, affective and anxiety disorders, cognitive impairment, and poor self-control.”

In addition, neurobehavioral problems and overall changes vary from person to person, and are likely to arise at the acute stage of a brain injury. The most prevalent neurobehavioral problems include extreme moods and mood swings, anger and rage, agitation and irritability, frustration, and even inappropriate vocalizations such as swearing or yelling.

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For years, behavior analysts have studied, analyzed, and directly observed different interactions and neurobehavioral changes following brain injuries. Studies like this one HERE are providing more educational content about neurobehavioral disinhibition and why it can impact a person’s ability to function and carry out everyday tasks.

Neurobehavioral Disinhibition & Substance Use Disorders

Due to the common occurrence of neurobehavioral disinhibition following brain trauma, a 2003 study findings published in The American Journal of Psychiatry states that neurobehavioral disinhibition might be an indicator of developing substance use disorders. This study’s results and other evidence suggests that neurobehavioral disinhibition is a component of the liability of the early age onset of substance use disorders (SUD).

On a similar note, researchers behind a 2004 study exploring neurobehavioral disinhibition and the development of substance use among adolescents found that:

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Inaccurate social cognition, significantly predicted by childhood neurobehavioral disinhibition, biases development toward marijuana use prodromal to SUD. These results indicate that cognitive processes, in conjunction with psychological self-regulation, comprise important components of the individual liability to SUD (substance use disorder).”

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A major goal for researchers and medical institutions is learning more about neurobehavioral changes and the loss of inhibition as a result of different brain injuries. Clinical trials like this one HERE are being conducted by numerous specialists and researchers to further understand the role neurobehavioral problems and disinhibition plays in substance use, abuse, and addiction in conjunction with existing research.

According to the Centers for Disease Control and Prevention (CDC), 2.87 million cases of TBI occurred in the U.S. in 2014, and roughly 13.5 million Americans struggle with a disability as a result of a brain injury. If you or someone you know experiences a brain injury followed by neurobehavioral changes and/or the loss of inhibition, it’s recommended to schedule a doctor’s appointment to discuss different treatment options and appropriate care.

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