On the Job with Fatigue and Cognitive Issues
by Jo Stratmoen
Fatigue and cognitive issues—not physical disability— are the major reasons why many people with MS eventually leave the workforce. Up to 87% of people with MS report significant fatigue. Cognitive dysfunction affects 45%-65% of people with MS. Fatigue can increase cognitive problems. So can stress. If not addressed, they may combine into a downward spiral.
"Some researchers believe fatigue is a direct consequence of the disease process while others suggest that it is also a factor associated with mobility problems, depression, and sleep disturbances," Forwell said. Moreover, research is hobbled because there are no truly objective measures of fatigue. It is hard to tease out the factors that go into a person's perceptions of his/her fatigue—and just as difficult to verify the outcomes of treatment.
Cytokines and axons: connections not proved
One mechanism of the disease process is the elevation of pro-inflammatory proteins called cytokines. In experiments, these cytokines trigger fatigue and sleepiness. Another mechanism is a loss of axons, the nerve fibers that conduct impulses through the central nervous system. Axon loss is associated with higher levels of disability. But, so far researchers have not been able to show that either elevated levels of pro-inflammatory cytokines or higher degrees of disability are always connected to higher levels of fatigue in MS.
Problems with mobility, sleep, or depression
Having any mobility problem increases fatigue. People with disabilities spend a lot of energy negotiating daily tasks. Depression shares some common attributes with fatigue, such as lack of energy and decreased motivation. "And sleep problems result in some of the same symptoms," Forwell said.
But once again, researchers cannot be certain that depression or sleep problems correlate strongly with the level of fatigue.
What to do
Clearly, getting a handle on fatigue is an ongoing process. Each person has to uncover the strategies that help her or him. Moreover, the degree to which a person can manage fatigue in the workplace depends on the type of work the individual does.
"Those who work in offices have a better chance of being able to reconfigure their workspace and workload to accommodate their fatigue," Forwell said. "Avoiding stairs, taking regular breaks, and having a comfortable place to rest from time to time can help a lot." Energy conservation techniques, shown in the table below, may be essential. Maintaining physical fitness also decreases fatigue so an exercise program is equally important.
"Unfortunately, some jobs require people to be on their feet all day. They cannot practice energy conservation," Forwell noted. "I advise them to try and switch to a job within the same industry that allows them to sit and take regular breaks."
First seek medical help
Check with your doctor if you habitually start the day feeling unrested or have symptoms of depression. Ask if any of your medications could be contributing to your fatigue. Ask about any herbs or dietary supplements you use as well, because some of them increase fatigue.
Then seek therapists who specialize in job retention
An occupational therapist can help develop strategies for performing daily activities at work and at home.
A vocational rehabilitation specialist can offer solutions such as redesigning a workspace or identifying other more suitable jobs. The Rehabilitation Services Administration, a federal agency, supports vocational rehabilitation programs in every state. Services may include funding for training, home or workplace modifications, and assistive technology to help people with disabilities obtain or maintain work. To contact your state's vocational rehabilitation program, go to http://www.jan.wvu.edu/ or telephone 800-526-7234 toll-free.
Do medications help?
This is a controversial area as no one medication clearly works well for everyone. According to Dr. Forwell, modafinil (Provigil) is the most useful agent available at the moment. This conclusion has come under scrutiny, as indicated in the sidebar"Mixed messages about Provigil for MS fatigue" below . Amantadine (Symmetrel) has demonstrated a modest benefit on MS fatigue and is much less expensive than modafinil. Both fluoxetine (Prozac) and bupropion (Wellbutrin) may be helpful.
Strike two: cognitive problems
You're at your desk working on a spreadsheet program and someone stops by to talk about last night's baseball game. This brief interruption is enough to derail your entire train of thought. You have to go back and start again. The impact of MS on cognition can make the simplest task into a complicated mental hurdle.
According to neuropsychologist Lauren Caruso, PhD, people with MS exhibit varying degrees and types of cognitive problems depending on where lesions are seen in their brains and whether atrophy, or loss of volume in the brain, has occurred. Magnetic resonance imaging (MRI) studies have helped clarify why many people with MS experience cognitive dysfunction.
"The most common problems to affect performance on the job are problems with attention, concentration, and short-term memory," Dr. Caruso said. It may become difficult to concentrate on two things at once. The ability to multi-task or think on your feet may diminish. Prioritizing thoughts, moving smoothly from topic to topic, or controlling the expression of emotions may become impaired.
In addition, some cognitive problems affect vision or communication. Dr. Caruso noted, "It is sometimes difficult for people with MS to recognize the relationship between objects that they see, or to find the right word to express what they want to say."
While these are correctly called cognitive problems, they don't affect intellectual function. Most people with MS are able to reason, learn, draw from their knowledge and experiences, and make appropriate conclusions and judgments.
What to do
General tips for cognitive issues are listed below. These ideas may also help:
People try a variety of complementary therapies to alleviate cognitive problems or to address side issues, such as stress, that make the problems more intense. Discuss any herbal or dietary supplement or other alternative treatment such as acupuncture with your MS health professional first. You should expect your MS professional to listen to your ideas and give you valuable insights. Practices such as yoga and meditation are known to help many people.
You're still in the game
While fatigue and cognitive problems caused by MS can have a major impact on the ability to work, every individual is different. Explore what works for you in order to learn what accommodations could contribute to your personal job performance. Look for strategies that compensate for your particular problems.
Keeping your job may feel like a full-time job in itself. Only you can know if the effort continues to be worth the result. You should know that many people with MS continue to work for many years, thanks to their determination, some good luck, and the help of knowledgeable professionals.
References for your health-care professional
1. Tartaglia MC, Narayanan S, Francis SJ, et al. The relationship between diffuse axonal damage and fatigue in multiple sclerosis. Arch Neurol 2004; 61:201-7.
2. Bagert B, Camplair P, Bourdette D. Cognitive dysfunction in multiple sclerosis: natural history, pathophysiology and management. CNS Drugs 2002; 16:445-55.
3. Schwid SR, Covington M, Segal BM, Goodman AD. Fatigue in multiple sclerosis: current understanding and future directions. J Rehabil Res Dev 2002; 39:211-24.
4. Rao SM. Cognitive function in patients with multiple sclerosis: impairment and treatment. Int J MS Care 2004; 1:9-22.
Jo Stratmoen wrote about myelin repair and protection research for InsideMS.
This article originally appeared in the February-March 2006 issue of InsideMS.
© 2007 National MS Society. All rights reserved.