Signs Of Mild Depression. Battling The Black Dog ?

Q: The relationship between multiple sclerosis (MS) and depression seems to be different from other neurological disorders. Instead of fluctuating levels of neurotransmitters like serotonin, dopamine, and norepinephrine, MS involves lesions on the brain and spinal cord where they have been stripped of their insulating myelin. Could demyelination play a role in depression?

A:The level of depression is the driving force in the quality of life of people with MS, probably more so than the overall burden of the disease itself. There is also evidence that depression impairs the management of MS symptoms, by reducing adherence to treatment. As with other neurological conditions, patients with MS-and their doctors-may find that they focus on the physical symptoms of their primary disease and pay less attention to the depression. But that's improving, says Dr. Patten. In 2005, the Multiple Sclerosis Society put out a consensus statement on screening for depression in MS, and I think it's had an impact.… I think eventually we're going to learn that if we deal better with depression in our patients, they'll do better overall. But managing this multifactorial susceptibility to depression isn't easy, as Susan Randall learned. The time-release carbidopa-levodopa (Sinemet CR) she began taking for her Parkinson's left her with what Dr. Menza described as a dopamine-derived depression, a crash that occurred when the drug began to wear off. It would just take

me over. It had nothing to do with being sad about anything, but I would be a totally different person, completely depressed and anxious, she says. This isn't uncommon. We see people who have mild depression that becomes much worse when they go through the 'on/off period'-the point at which dopamine drugs stop working over the course of the day, he explains. We believe it's partially biochemical changes in the brain that are driving the temporary worsening of the depression. When the patient goes back on the medication, they're fine again. Depression during this wearing-off period can also occur in Parkinson's patients who don't otherwise experience depression.