Why seizures seem slightly more common in MS than in the general population is not clear, but it has been suggested that lesions in the brain caused by the disease may be a trigger. Close to 70% of seizures that occur in MS are focal, arising from a localized brain region rather than the whole brain. Seizures are uncommon in MS, with an estimated incidence of 2% to 5% compared with 3% in the general population. They can cause changes in a person’s behavior, movements, and levels of consciousness. Seizures result from sudden, uncontrolled, and abnormal electrical discharges in the brain. It can also be triggered by some medications. Tremor in MS is thought to be caused by damage in nerve areas responsible for movement coordination. MS patients usually report twitching in their limbs, but also in their heads, torso, and even in their vocal cords. Tremor is an involuntary movement of the body, such as those in limbs or head. While twitching and tremor are common symptoms in other diseases of the central nervous system, such as Parkinson’s, they are not generally considered common in MS. Dysphonia may be linked to weakness in the diaphragm. These symptoms may result from MS lesions in parts of the brain that control speech and also from weakness and/or lack of coordination of the muscles in the mouth, tongue, and lips due to damage of the nerves that control these muscles. Patients may also experience changes in their speech pattern, with long pauses between words or individual syllables of words. Slurring, referred to as dysarthria, and a hoarse voice (dysphonia) have been reported in people with MS.
Some MS patients can experience issues with speech articulation, such as slurred speech and problems with getting words out. Seven of the less common symptoms of this disease are described below. While there are common symptoms that many MS patients share, such as pain and chronic fatigue, some may experience more unusual symptoms.
Multiple sclerosis (MS) is a disease that is unique to each patient, meaning that no two people experience the exact same disease manifestations.
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