What are the Symptoms of MdDS?
Persistent sensation of motion and imbalance such as:
- Rocking
- Bobbing
- Swaying
- Staggering gait
- Fatigue
- Cognitive impairment
- Disequilibrium
- Sense of unstable ground
Symptoms Not Typically Associated with MdDS
- Rotational or spinning vertigo
- Double vision
- Bouncing vision
- Nystagmus
- Sound sensitivity
- Tinnitus
- Hearing loss
See the Diagnostic Criteria consensus document of the Classification Committee of the Bárány Society (PDF)
Symptoms Less Frequently Reported
- Sensitivity to light
- Dizziness
- Headaches
- Migraine Headaches
- Intolerance of busy patterns
- Visual motion intolerance
- Loss of self-confidence
- Nausea
- Confusion
- Memory loss
- Ear pain and/or fullness
- Anxiety & depression
- Difficulty concentrating
- Difficulty multitasking
Is MdDS Remission Possible?
Yes! As a given course of MdDS progresses toward sustained remission, symptoms may become less severe and temporary remissions more frequent. Temporary remissions may occur as brief intervals, e.g., for hours, days, or weeks.
Symptom Severity Scale
- 1 - 2
-
Sensation of rocking/bobbing/swaying is almost imperceptible. Most often noticed while walking but may also be recognized while sitting, standing or lying down. Can usually perform routine daily functions without the need for rest periods.
- 3 - 4
-
Rocking/bobbing/swaying sensation is almost constant but can function fairly well with occasional rest periods. The sensation of rocking/bobbing/swaying may include the perception of movement along either a horizontal or vertical axis. The floor seems to move when walking (as if walking on a suspension bridge, water bed, or trampoline). Altered balance. Cannot remain standing in a fixed position with eyes closed.
- 5 - 6
-
Rocking/bobbing/swaying intensity is increased. Accompanied by difficulty in concentration and/or mental confusion (impaired cognitive function). Most routine tasks become difficult to accomplish. Require periods of rest. May stumble when walking.
- 7 - 8
-
Rocking/bobbing/swaying is more severe and noticeable while walking, standing, or sitting. Associated with considerable fatigue. Increased loss of concentration and/or mental confusion. Balance is affected (bump into objects when walking; clumsy in handling objects; may drop things).
- 9 - 10
-
Rocking/bobbing/swaying is extremely severe. Balance is very poor. Require support for walking and standing (have to hold onto walls). Significant mental confusion. Impaired ability to speak. Remain in bed most of the day.
Sensation of rocking/bobbing/swaying is almost imperceptible. Most often noticed while walking but may also be recognized while sitting, standing or lying down. Can usually perform routine daily functions without the need for rest periods.
Rocking/bobbing/swaying sensation is almost constant but can function fairly well with occasional rest periods. The sensation of rocking/bobbing/swaying may include the perception of movement along either a horizontal or vertical axis. The floor seems to move when walking (as if walking on a suspension bridge, water bed, or trampoline). Altered balance. Cannot remain standing in a fixed position with eyes closed.
Rocking/bobbing/swaying intensity is increased. Accompanied by difficulty in concentration and/or mental confusion (impaired cognitive function). Most routine tasks become difficult to accomplish. Require periods of rest. May stumble when walking.
Rocking/bobbing/swaying is more severe and noticeable while walking, standing, or sitting. Associated with considerable fatigue. Increased loss of concentration and/or mental confusion. Balance is affected (bump into objects when walking; clumsy in handling objects; may drop things).
Rocking/bobbing/swaying is extremely severe. Balance is very poor. Require support for walking and standing (have to hold onto walls). Significant mental confusion. Impaired ability to speak. Remain in bed most of the day.
What Increases MdDS Symptoms?
- Stress
- Lack of sleep
- Working at a computer for extended intervals
- Enclosed spaces such as the shower, stairwells or long hallways especially those with busy carpet patterns
- Supermarket aisles and other rapidly changing stimuli such as flipping through pages or images & screen scrolling
- Changes in barometric pressure (weather)
- Allergy symptoms
- The end of the day, increasing as the day progresses.
What Alleviates MdDS Symptoms?
- Travel (e.g., movement/motion in a car or airplane)
- Establishing a vigorous exercise program
Is MdDS Episodic?
In some patients, repeated bouts of MdDS may occur and are usually associated with a precipitating event, e.g., travel or high stress. Subsequent episodes are generally more prolonged but some patients experience a quick return to baseline.