Have you
seen those TV commercials lately with actor Danny Glover talking about a
neurological disorder that causes people to break out into uncontrollable
laughter or crying? This health care issue is known as pseudobulbar affect or
PBA, and its debilitating characteristics effects tens of thousands of newly
diagnosed cases per year.
Pseudobulbar affect
(PBA), emotional lability, labile
affect, or emotional
incontinence refers to a neurologic disorder characterized by
involuntary crying or uncontrollable episodes of crying and/or laughing, or
other emotional displays. PBA occurs secondary to a neurologic disease or brain
injury.
Patients may find themselves crying uncontrollably at something that is
only moderately sad, being unable to stop themselves for several minutes.
Episodes may also be mood-incongruent: a patient might laugh uncontrollably
when angry or frustrated, for example.
PBA episodes can be described in two key ways, according
to PBAinfo.com:
·
PBA outbursts can be inappropriate: The crying or
laughing episodes are inappropriate to the situation in which they occur.
Sometimes these are spontaneous crying or laughing eruptions that don’t reflect
the way a person is actually feeling.
·
PBA outbursts can be exaggerated: Another characteristic
of PBA episodes is that though the crying or laughing may be appropriate for a
given situation, they’re exaggerated – they’re more intense or last longer than
the situation calls for.
One of the jobs of the brain is to figure out how we feel
in the moment. That information is then sent down to the brainstem, also known
as the “bulb.” The brainstem then sends signals to the face and other parts of
the body that show emotion.
PBA is believed to be the result of a disruption of these
signals. When people have certain neurologic conditions or brain injuries, it
can cause damage in the brain tissue that creates a disconnection between the
parts of the brain that express emotion and those that control emotion.
The result is the frequent outbursts of involuntary
crying or laughing known as pseudobulbar affect. If you break the term down
literally, “pseudo” means false, “bulbar” refers to the brainstem and “affect,”
describes how the body shows mood or emotion. More details can be found at this
website: http://www.pbainfo.org/science
.
The side-effects for PBA sufferers include feelings of
emotional exhaustion and, frequently, social isolation, according to Psychology
Today. Without realizing that they have a medical problem, people with PBA
often adapt their lives to avoid things that trigger the response, including
interacting with others unless they absolutely have to. With social isolation
comes more negative emotion that can over time manifest as depression.
While all of this may sound like new knowledge
about a recently discovered disease, PBA has actually been well-documented in
the medical literature for more than 100 years, though it has been labeled at
least ten different things during that time. More detailed material is found at
this site: https://www.psychologytoday.com/blog/neuronarrative/201110/not-all-crying-is-depression-understanding-pseudobulbar-affect
.
According to the National Institutes of Health, although
it is most commonly misidentified as a mood disorder, particularly depression
or a bipolar disorder, there are characteristic features that can be recognized
clinically or assessed by validated scales, resulting in accurate
identification of PBA, and thus permitting proper management and treatment.
Mechanistically, PBA is a disinhibition syndrome in which pathways involving
serotonin and glutamate are disrupted.
This knowledge has permitted effective treatment for many
years with antidepressants, particularly tricyclic antidepressants and
selective serotonin reuptake inhibitors. A recent therapeutic breakthrough
occurred with the approval by the Food and Drug Administration of a
dextromethorphan/quinidine combination as being safe and effective for
treatment of PBA.
Side effect profiles and contraindications differ for the
various treatment options, and the clinician must be familiar with these when
choosing the best therapy for an individual, particularly elderly patients and
those with multiple comorbidities and concomitant medications. A much more
detailed clinical explanation and overview is available at this site: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3849173/
.
To
distinguish PBA from depression or other causes, doctors may administer a
questionnaire rating episode frequency, duration, voluntary control and
appropriateness to context and inner feelings. Additional details can be found
at this website: http://alsn.mda.org/article/pba-symptoms-no-laughing-matter
.
According to the American Stroke Association, in January 2011, the FDA approved a
new drug called Nuedexta™ (dextromethorphan quinidine) specifically for PBA. In
clinical trials, it proved effective against placebo, but it has not been
compared directly to antidepressants. Analyzing data across studies, it appears
to be faster acting than the anti-depressants with few side effects. Nuedexta™ is not recommended for
patients with certain arrhythmias: prolonged Q-T interval, complete heart
block, history of torsades de point (a type of ventricular tachycardia) or
heart failure.
As with any new drug, there is a considerable cost difference when compared to older, off-patent medications. Nuedexta™ is manufactured by Avanir Pharmaceuticals and costs $200–300 for a month’s supply. The SSRIs mentioned in the article are $10–$12/month. Though off-patent antidepressants are often used in treating PBA, Nuedexta™ is the only prescription drug currently indicated specifically for PBA by the FDA. Avanir, like many pharmaceutical companies, does have a Patient Assistance Program. More detail on this medication and PBA is available at this website: http://www.strokeassociation.org/STROKEORG/LifeAfterStroke/RegainingIndependence/EmotionalBehavioralChallenges/Pseudobulbar-Affect-PBA_UCM_467457_Article.jsp
As with any new drug, there is a considerable cost difference when compared to older, off-patent medications. Nuedexta™ is manufactured by Avanir Pharmaceuticals and costs $200–300 for a month’s supply. The SSRIs mentioned in the article are $10–$12/month. Though off-patent antidepressants are often used in treating PBA, Nuedexta™ is the only prescription drug currently indicated specifically for PBA by the FDA. Avanir, like many pharmaceutical companies, does have a Patient Assistance Program. More detail on this medication and PBA is available at this website: http://www.strokeassociation.org/STROKEORG/LifeAfterStroke/RegainingIndependence/EmotionalBehavioralChallenges/Pseudobulbar-Affect-PBA_UCM_467457_Article.jsp
One of the best ways to deal with PBA is to tell your
friends, co-workers, and family that you have it. Explain what PBA is and what
causes it. Let the people around you know that you may have uncontrolled
emotional outbursts. That way, when you suddenly burst into tears or start
laughing they won’t be surprised or shocked. And you won’t have to always worry
about losing control at the wrong moments, according to HealthLine.com.
You can gain some control over your symptoms with a few
simple tricks. When you start feeling the urge to laugh or cry, try to distract
yourself. Think about something different. If you’re crying, try to focus on
something upbeat or funny. For example, you could think about a funny movie you
saw recently. Take slow, deep breaths. And relax the muscles that start to
tense up whenever you have an episode. More info is located at this site: http://www.healthline.com/health/multiple-sclerosis/pseudobulbar-affect#Medicines8
.
PBA can
have an enormous impact on a person's social life. Emotional episodes caused by
the disease can be embarrassing and can damage interpersonal relationships. The
Brain Injury Association of America study indicates that 60% of people with
brain injuries feel that PBA and its accompanying outbursts make it hard for
them to initiate and maintain friendships. The disease was also the cited
culprit in being housebound for 40% of people in the survey.
For
caregivers of people with PBA, it can be difficult trying to deal with a person
who feels isolated and alone because of their disease. PBAinfo.org offers a few tips for caregivers
to help them interact positively with emotionally explosive loved ones:
·
Let
them know that you support them and they are not alone. Reassure them that many
people suffer from the symptoms of PBA.
·
Remind
them that their outbursts are caused by a physical disease, not a mental
condition.
·
Indicate
your willingness to listen to their frustrations and concerns.
·
Keep
an "episode diary." By recording PBA episodes, you can ensure better
communication with your doctor and help him or her make an accurate diagnosis.
According
to the American Stroke Association, these episodes can strike a person up to
100 times a day. They can be a few seconds to a few minutes long. More
information about this topic for seniors and others is available at this
website: https://www.agingcare.com/Articles/crying-is-not-always-depression-148580.htm
.
Psuedobulbar
Affect has been identified in several million patients, both men and women. It is
a disease that can be managed, but not readily identified unless the doctor
knows what to look for and how to treat it. More people suffer every day from
PBA. The good news is that there are therapies to help overcome PBA and its
impact on the lives of those who have it. If you think you may be symptomatic,
or know someone whom you may suspect exhibits the symptoms, see your healthcare
provider to get a proper diagnosis.
Until next
time.