|
Stress Article |
Article copied
from http://www.brainconnection.com
Use your BACK button to
return to previous page or >
HOME
Stress
September 1999
WHAT IS STRESS?
The Physical Responses to Acute Stress
Following a threat, the part of the brain called the hypothalamic-pituitary-adrenal (HPA) system releases certain neurotransmitters (chemical messengers) called catecholamines, particularly those known as known as dopamine, norepinephrine, and epinephrine (also called adrenaline). The HPA systems also trigger the production and release of steroid hormones (glucocorticoids), including the primary stress hormone cortisol. Cortisol affects systems throughout the body. Catecholamines also activate an area inside the brain called the amygdala, which apparently triggers an emotional response to a stressful event and also signals the hippocampus (a nearby area in the brain) to store the emotionally loaded experience in long-term memory. In primitive times, this combination of responses would have been essential for survival, when long-lasting memories of dangerous stimuli (such as a large animal) would be critical for avoiding such threats in the future. During a stressful event, catecholamines also suppress activity in areas at the front of the brain concerned with short-term memory, concentration, inhibition, and rational thought. This sequence of mental events allows a person to react quickly, either to fight or to flee, in emergency situations; however, this also hinders a person's ability to handle complex social or intellectual tasks and behaviors.
HOW SERIOUS IS LONG-TERM STRESS?
Psychologic Effects
Heart Disease
Stroke
Susceptibility to Infections
Digestive Problems
Weight Problems
Diabetes
Pain
Sleep Disturbances
Sexual and Reproductive Dysfunction
Memory, Concentration, and Learning
Skin
WHO IS PRONE TO STRESS-RELATED DISORDERS?
Biologic or Genetic Factors
In some people, exposure to frequent episodes of stress can cause blood pressure spikes, which over time, may lead to heart disease.
In most people, repeated exposure to a specific nondangerous stressful situation (such as public speaking) eventually reduces the level of stress that occurs with such an event. In some people, however, stress hormones become elevated to the same degree with repeated exposure to the situation as they were to the first.
In some people, stress hormones remain elevated instead of returning to normal levels. This may occur in highly competitive athletes or people with a history of depression.
In some people, parts of the stress response may be underactive, causing other parts to overreact. For example, if the brain fails to produce enough cortisol, the immune system may overproduce certain factors that would have been suppressed by this stress hormone, and that can cause harm in excessive amounts. (Such abnormal responses may play a role in autoimmune diseases.)
Age
Personality
Isolation
Factors at Work and at Home
WHAT OTHER CONDITIONS HAVE THE SAME SYMPTOMS AS STRESS?
Anxiety Disorders
Depression
Depression can be a disabling condition, and, like
anxiety disorders, may result from untreated chronic stress. Depression also
mimics some of the symptoms of stress, including changes in appetite, sleep
patterns, and concentration. Serious depression, however, is distinguished
from stress by feelings of sadness, hopelessness, loss of interest in life,
and, sometimes, thoughts of suicide. Acute depression is also accompanied by
significant changes in the patient's functioning. Professional therapy may
be needed in order to determine if depression is caused by stress or if it
is the primary problem.
Post-Traumatic Stress Disorder Symptoms
Post-traumatic stress disorder (PTSD) is a reaction
to a very traumatic event: it is actually classified as an anxiety disorder.
The event that precipitates PTSD is usually outside the norm of human
experience, such as intense combat or sexual assault. The patient struggles
to forget the traumatic event and frequently develops emotional numbness and
event-related amnesia. Often, however, there is a mental flashback, and the
patient re-experiences the painful circumstance in the form of intrusive
dreams and disturbing thoughts and memories, which resemble or recall the
trauma. Other symptoms may include lack of pleasure in formerly enjoyed
activities, hopelessness, irritability, mood swings, sleep problems,
inability to concentrate, and an excessive startle-response to noise.
WHAT ARE SOME METHODS FOR REDUCING STRESS?
Perhaps the best
general approach for treating stress can be found in the elegant passage by
Reinhold Niebuhr, "Grant me the courage to change the things I can change,
the serenity to accept the things I can't change, and the wisdom to know the
difference." In choosing specific strategies for treating stress, several
factors should be considered. First, no single method is uniformly
successful: a combination of approaches is generally most effective. Second,
what works for one person does not necessarily work for someone else. Third,
stress can be positive as well as negative. Appropriate and controllable
stress provides interest and excitement and motivates the individual to
greater achievement, while a lack of stress may lead to boredom and
depression. Finally, stress may play a part in making people vulnerable to
illness. A physician or psychologist should be consulted if there are any
indications of accompanying medical or psychologic conditions, such as
cardiac symptoms, significant pain, anxiety, or depression.
It is very
important to note that no evidence exists that treating stress can cure
medical problems, although a recent study indicated that stress management
programs may reduce the risk of cardiac events (eg., heart attack) by up to
75% in people with heart disease. One study found it was even more effective
than exercise (although exercise also reduced the risk.) Such programs
should never be used alone to treat any medical condition.
One major
obstacle to reducing stress is the fight or flight response itself; the very
idea of relaxation feels threatening, because it is perceived as letting
down one's guard. If stress is provoked by an over-demanding boss for
instance, the subordinate may feel the need to remain in a psychologic state
of fighting-readiness, even though there is no safe opportunity to express
anger against the boss. Stress builds up, but the victim has the illusion,
even subconsciously, that it is providing safety or preparedness, so does
nothing to correct the condition. Often people succeed in relieving stress
for the short-term but resort to previous ways of stressful thinking and
behaving because of outside pressure or entrenched habits. It is essential
to remember that reducing stress and keeping relaxed not only helps maintain
health but gives the mind more opportunities for clearer thinking in order
to initiate appropriate actions to get rid of the conditions causing stress.
The process of learning to control stress is life-long, and will not only
contribute to better health, but a greater ability to succeed in one's own
agenda.
Cognitive-Behavioral Techniques
Cognitive-behavioral methods are the most effective
ways to reduce stress. They include identifying sources of stress,
restructuring priorities, changing one's response to stress, and finding
methods for managing and reducing stress.
Identifying Sources of Stress. It is
useful to start the process of stress reduction with an informal inventory
of daily events and activities. The first step is to keep a diary noting
which activities put a strain on energy and time, trigger anger or anxiety,
or precipitate a negative physical response (eg., a sour stomach or
headache). Positive experiences should also be noted, such as those that are
mentally or physically refreshing or produce a sense of accomplishment.
While this exercise might itself seem stress producing and yet one more
chore, it need not be done in painstaking detail. A few words accompanying a
time and date will usually be enough to serve as reminders of significant
events or activities. After a week or two, the stressed individual should
try to identify two or three events or activities that have been
significantly upsetting or overwhelming. Priorities and goals should then be
carefully examined. Individuals should question whether the stressful
activities meet their own goals or someone else's, whether they have taken
on tasks that they can reasonably accomplish, and which tasks are in their
control and which ones aren't.
Restructuring Priorities.
The next step is to attempt to shift the balance from stress-producing to
stress-reducing activities. A recent study indicated that daily pleasant
events have positive effects on the immune system. In fact, adding
pleasurable events has more benefit than simply reducing stressful or
negative ones. This is important to realize because many difficult stressful
situations, such as unpleasant working conditions, an unhappy family
situation, or a significant loss, can't simply be rescheduled or wished
away. When eliminating the stress is not practical, there may be ways to
reduce its impact. If the problem is work-related and it is impossible to
change jobs or cut back on hours, consider as many pleasant relief options
as possible. Examples include taking long weekends or vacations, sending out
resumes or working on transfers within the company, and planning pleasant
diversions or physical exercise during lunch hours. If stress at home is the
problem, plan times away, even if it is only an hour or two a week. Learn to
replace time-consuming chores that aren't really necessary with activities
that are pleasurable or interesting. Making time for recreation is as
essential as paying bills or shopping for groceries. Many people are afraid
of being perceived as selfish if they make decisions that benefit only
themselves. The truth is that self-sacrifice may be inappropriate and even
damaging if the person making the sacrifice is unhappy, angry, or physically
unwell. In most cases, small daily decisions for improvement can accumulate
and work to reconstruct a stressed existence into a pleasant and productive
one.
Adjusting Responses to Stress.
Many people believe that certain emotional responses to stress, such as
the negative and aggressive Type A behavior associated with heart disorders,
are innate features of personality. Research has shown, however, that
individuals can be taught to change their emotional reactions to stressful
events. Given the fixed nature of many major stresses, such as the loss of a
loved one, chronic illness, or pressures from work, cognitive behavioral
therapy, which teaches new ways of responding to stress, may be the most
effective method of permanently reducing its effects.
Discuss Feelings.
The concept of communication and letting your feelings out has been so
excessively promoted and parodied that it has nearly lost its value as good
psychologic advice. Nevertheless, feelings of anger or frustration that are
not expressed in an acceptable way may lead to hostility, a sense of
helplessness, and depression. Expressing feelings does not mean venting
frustration on waiters and subordinates, boring friends with emotional
minutia, or wallowing in self-pity. In fact, because certain chronically
hostile individuals can experience harmful spikes in blood pressure when
they are angry, some therapists strongly advise that just talking not
venting anger without any progress is the best approach for these people.
The primary goal is to explain and assert one's needs to a trusted
individual in as positive a way as possible. Direct communication with
another person may not even be necessary; writing in a journal or composing
a letter that is never mailed may be sufficient. Expressing ones feelings is
not enough, however. Learning to listen, empathize, and respond to others
with understanding is just as important for maintaining the strong
relationships necessary for emotional fulfillment and reduced stress.
Keep Perspective and Look for the Positive.
Reversing negative ideas and learning to focus on positive outcomes helps
reduce tension and achieve goals. For example, a person who is alarmed at
the prospect of giving a speech should first identify the worst possible
outcomes (forgetting the speech, stumbling over words, humiliation, audience
contempt) and their likelihood of happening (probably very low or that
speaker wouldn't have been selected in the first place). The next step is to
envision a favorable result (a well-rounded, articulate presentation with
rewarding applause). Then a plan should be developed to achieve the positive
outcome (preparing in front of a mirror, using a video camera or tape
recorder, relaxation exercises). It is helpful to remember previous
situations that initially seemed negative but ended well.
Use Humor.
Keeping a sense of humor during difficult situations is a common
recommendation from stress management experts. Laughing releases the tension
of pent-up feelings and helps keep perspective. Research has shown that
humor is a very effective mechanism for coping with acute stress. It is not
uncommon for people to recall laughing intensely even during tragic events,
such as the death of a loved one, and to remember this laughter as helping
them to endure the emotional pain.
Relaxation Techniques
Since stress is here to stay, everyone needs to
develop methods for invoking the relaxation response, the natural unwinding
of the stress response. Relaxation lowers blood pressure, respiration, and
pulse rates, releases muscle tension, and eases emotional strains. This
response is highly individualized, but there are certain approaches that
seem to work, including exercise, deep breathing, muscle relaxation, and
meditation. No one should expect a total resolution of stress from these
approaches, but if done regularly, these programs can be very effective.
Adopting Healthy Habits
People under chronic stress frequently seek relief
through drug or alcohol abuse, tobacco use, abnormal eating patterns, or
passive activities, such as watching television. The damage these
self-destructive habits cause under ordinary circumstances is compounded by
the physiologic effects, of stress itself. And, the cycle is
self-perpetuating; a sedentary routine, an unhealthy diet, alcohol abuse,
and smoking promote heart disease, interfere with sleep patterns, and lead
to increased rather than reduced tension levels. Drinking four or five cups
of coffee, for example, can cause changes in blood pressure and stress
hormone levels similar to those produced by chronic stress. Animal fats,
simple sugars, and salt are known contributors to health problems. General
health and stress resistance can be enhanced by a diet rich in a variety of
whole grains, vegetables, and fruits and by avoiding stresses such as
alcohol, caffeine, and tobacco.
Exercise.
Exercise in combination with stress management techniques is extremely
important, and for those with heart disease can even reduce significantly
the risk for a heart attack. As the body attains fitness its ability to
withstand stress is enhanced. The heart and circulation are able to work
harder for longer stretches. The muscles, ligaments, bones, and joints
become stronger and more flexible. And the mind is often better able to cope
with stress and stay on an even, happier keel. Studies show that employees
who follow an active lifestyle need fewer sick and disability days than
sedentary workers. Usually, a varied exercise regime is more interesting,
and thus easier to stick to. Start slowly. Strenuous exercise in people who
are not used to it can be very dangerous and any exercise program should be
discussed with a physician. In addition, half of all people who begin a
vigorous training regime drop out within a year, so the key is to find
activities that are exciting, challenging, and satisfying. Signing up for
aerobics classes at a gym can help prompt regular exercise. Because it is so
natural and convenient, brisk walking is an excellent aerobic exercise. Even
short brisk walks can relieve bouts of stress. Swimming is another ideal
exercise for many people including pregnant women, individuals with
musculoskeletal problems, and those who suffer exercise-induced asthma. Yoga
or Tai Chi can be very effective, combining many of the benefits of
breathing, muscle relaxation and meditation while toning and stretching the
muscles.
As in other areas of stress management, making a
plan and executing it successfully develops feelings of mastery and control,
which are very beneficial in and of themselves. Start small. Just 10 minutes
of exercise three times a week can build a good base for novices. Gradually
build up the length of these every-other-day aerobic sessions to 30 minutes
or more.
Strengthen or Establish a Support Network
Studies of people who remain happy and healthy despite many life stresses conclude that most have very good networks of social support. One study indicated that support even from strangers reduced blood pressure surges in people undergoing a stressful event. Many studies suggest that having a pet helps reduce medical problems aggravated by stress, including heart disease and high blood pressure.
Professional Help and Medications
Stress can be a factor in a variety of physical and
emotional illnesses, which should be professionally treated. Many stress
symptoms are mild and can be managed by over the counter medications, eg.,
aspirin, acetaminophen, or ibuprofen for tension headache and antacids, and
anti-diarrhea medications or laxatives for mild stomach distress. A
physician should be consulted, however, for physical symptoms that are out
of the ordinary, particularly those which progress in severity or awaken one
at night. A mental health professional should be consulted for unmanageable
acute stress or for severe anxiety or depression. Often short-term therapy
can resolve stress-related emotional problems.
Reducing Stress at Work
Many institutions within the current culture, while paying lip service to
stress reduction, put intense pressure on individuals to behave in ways that
promote tension. Some experts argue that employers should be held
responsible for taking measures to prevent stress from work overload and
should provide help to deal with work-related stress. Studies continue to
show that company-sponsored programs aimed at stress reduction are very
effective. Treating stress has a number of benefits, not only for the
individual but also for the patient's employer. In one study, for example,
in which a company set up a two-year stress management educational program,
the savings to the company in workmen's compensations costs were nearly
$150,000, compared to the cost of the program which was only $150 per
participant for a total of $6,000.
Here are some tips: seek out someone in the Human
Resources department or a sympathetic manager, and communicate concerns
about job stress. Work with them in a non-confrontational way to improve
working conditions, letting them know that productivity can be improved if
some of the pressure is off. Establish or reinforce a network of friends at
work and at home. Restructure priorities and eliminate unnecessary tasks.
Learn to focus on positive outcomes. If the job is unendurable, plan and
execute a career change. If this isn't possible, be sure to schedule daily
pleasant activities and physical exercise during free time. Use stress
reduction techniques described in this report. It is also helpful to keep in
mind that the employers are victimized by the same stressful conditions they
are imposing.
Relaxation Techniques
Deep Breathing
During stress, breathing becomes shallow and rapid.
Taking a deep breath is an automatic and effective technique for winding
down. Deep breathing exercises consciously intensify this natural
physiologic reaction and can be very useful during a stressful situation, or
for maintaining a relaxed state during the day. Inhale through the nose
slowly and deeply to the count of ten, making sure that the stomach and
abdomen expand but the chest does not raise up. Exhale through the nose,
slowly and completely, also to the count of ten. To help quiet the mind,
concentrate fully on breathing and counting through each cycle. Repeat five
to ten times and make a habit of doing the exercise several times each day,
even when not feeling stressed.
Muscle Relaxation
Muscle relaxation techniques, often combined with
deep breathing, are simple to learn and very useful for getting to sleep.
After lying down in a comfortable position without crossing the limbs,
concentrate on each part of the body, beginning with the top of the head and
progressing downward to focus on all the muscles in the body. Be sure to
include the forehead, ears, eyes, mouth, neck, shoulders, arms and hands,
fingers, chest, belly, thighs, calves, and feet. (Some individuals even
imagine tensing and releasing internal muscles once the external review is
complete.) A slow, deep breathing pattern should be maintained throughout
this exercise. Tense each muscle as tightly as possible for a count of five
to ten and then release it completely; experience the muscle as totally
relaxed and lead-heavy. Continue until the feet are reached. In the
beginning it is useful to have a friend or partner check for tension by
lifting an arm and dropping it; the arm should fall freely. Practice makes
the exercise much more effective and produces relaxation much more rapidly.
Meditation
One technique requiring little adaptation in the daily schedule has been termed mini-meditation. The method involves heightening awareness of the immediate surrounding environment, thus redirecting the stress-provoking brain activity into focusing on existing sensory input. One should first chose a routine activity when alone. For example while washing dishes concentrate on the feel of the water and dishes, allow the mind to wander to any immediate sensory experience (sounds outside the window, smells from the stove, colors in the room). If the mind begins to think about the past or future, abstractions or worries, redirect it gently back. This redirection of brain activity from your thoughts and worries to your senses disrupts the stress response and prompts relaxation. It also helps promote an emotional and sensual appreciation of simple pleasures already present in a person's life.
Biofeedback
During biofeedback, electric leads are taped to a subject's head. The person is encouraged to relax using methods such as those described above. Brain waves are measured and an auditory signal is emitted when alpha waves are detected, a frequency which coincides with a state of deep relaxation. By repeating the process, subjects associate the sound with the relaxed state and learn to achieve relaxation by themselves.
Massage Therapy
Massage therapy appears to slow down the heart and
relax the body. Rather than causing drowsiness, however, massage actually
increases alertness. A number of massage therapies are available for
relaxing muscles, including the following: (1) Shiatsu, which applies
intense pressure to parts of the body and can be painful, but people report
deep relaxation afterward. (2) Reflexology, which manipulates pressure
points in the hands and feet. (3) Swedish massage, which has been available
for years and uses muscle manipulation.
ABOUT WELL-CONNECTED
Well-Connected
reports are written and updated by experienced medical writers and reviewed
and edited by the in-house editors and a board of physicians at Harvard
Medical School and Massachusetts General Hospital. The reports are
distinguished from other information sources available to patients and
health care consumers by their quality, detail of information and currency.
These reports are not intended as a substitute for medical professional help
or advice but are to be used only as an aid in understanding current medical
knowledge. A physician should always be consulted for any health problem or
medical condition. The reports may not be copied without the express
permission of the publisher.
Board of Editors
Stephen A. Cannistra, MD, Oncology, Associate Professor of Medicine, Harvard Medical School; Director, Gynecologic Medical Oncology, Beth Israel Deaconess Medical Center
Masha J. Etkin, MD, PhD, Gynecology, Harvard Medical School; Physician, Massachusetts General Hospital
John E. Godine, MD, PhD, Metabolism, Harvard Medical School; Associate Physician, Massachusetts General Hospital
Daniel Heller, MD, Pediatrics, Harvard Medical School; Associate Pediatrician, Massachusetts General Hospital; Active Staff, Children's Hospital
Paul C. Shellito, MD, Surgery, Harvard Medical School; Associate Visiting Surgeon, Massachusetts General Hospital
Theodore A. Stern, MD, Psychiatry, Harvard Medical School; Psychiatrist and Chief, Psychiatric Consultation Service, Massachusetts General Hospital
Carol Peckham, Editorial Director
Cynthia Chevins, Publisher
Well-Connected Report, © 1999 Nidus Information Services, Inc., 41 East 11th Street, 11th Floor, New York, NY 10003 or call 1-800-334-WELL (9355) or 212-260-4268 or fax 212-529-2349