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BellaOnline's Neuromuscular Diseases Editor

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Balance and Neuromuscular Disease


While everyone knows about the “five senses” – sight, hearing, smell, taste, touch – little attention is paid to another of important sense, the sense of balance, unless problems develop. Many of the neuromuscular diseases affect balance.

The sense of balance informs the brain about where one’s body is in space, including what direction the body moves and points and if the body remains still or moves. The sense of balance relies on sensory input from a number of systems. Disruption in any of the following systems can affect balance and equilibrium:

--Proprioception involves the sense of where one’s body is in space. Sensory nerves in the neck, torso, feet and joints provide feedback to the brain that allows the brain to keep track of the position of the legs, arms, and torso. The body then can automatically make tiny changes in posture to help maintain balance.
--Sensors in the muscles and joints also provide information regarding which parts of the body or in motion or are still.
--Visual information provides the brain with observations regarding the body’s placement in space. In addition, the eyes observe the direction of motion.
--The inner ears (labyrinth and vastibulocochlear nerve) provide feedback regarding direction of movement, particularly of the head.
--Pressure receptors in the skin send information to the brain regarding what parts of the body are in space and which part touch the ground (when standing), a chair (when sitting), or the bed (when recling).
--The central nervous system (the brain and spinal cord) integrates and processes the information from each of these sources to provide one with a “sense of balance.”

Problems with balance may occur in many individuals with neuromuscular disease. For example, problems with proprioception often occur in individuals with diseases such as Freidreich’s ataxia, Charcot Marie Tooth, myopathy, and spinal muscular atrophy due to loss of sensation in the joint. Visual losses and severe muscle weakness can lead to balance difficulties for those with mitochondrial myopathy. Loss of muscle strength occuring in neuromuscular disease can also contribute to balance problems.

Problems with balance can contribute to problems such as poor gait, clumsiness, and falling in children and adults. Falling can cause injury, including minor injuries such as cuts and bruises, as well as major injuries such as bone fractures and head injury. Poor balance can also lead to sensations such as disequilibrium, light-headedness, dizziness, and vertigo. Balance problems may also lead to social embarrassment.

Individuals with neuromuscular disease may benefit from consulting their physicians regarding methods for improving balance. Methods may include learning new movement habits, improving concentration and attention to movement, engaging in physical therapy and appropriate moderate exercise, making home modification, and using of assistive devices.

Even though sense of balance has often been overlooked unless problems develop, one’s sense of balance provides important sensory information that impacts quality of life. A better understanding of the this important sense can help individuals to cope better with the challenges of living with neuromuscular disease.

Resources:
CMTA, (2010). Types and Causes of CMT. CMTA website. http://www.cmtausa.org/index.php?option=com_content&view=article&id=75:types-and-causes-of-cmt&catid=10:resources&Itemid=51 . Retrieved 11/4/11.

Kids Health from Nemours, (n.d.). Balance Disorders. KidsHealth from Nemours website. http://kidshealth.org/parent/medical/ears/balance_disorders.html . Retrieved 11/4/11.

MDA, (2008). A Teacher’s Guide to Neuromuscular Disease. http://www.mda.org/publications/tchrdmd/ . Retrieved 11/4/11.

MedicineNet.com, (n.d.). Balance – How Do We Do It? http://www.medicinenet.com/script/main/art.asp?articlekey=14637 . Retrieved 11/4/11.

Medvascek, C., (2002). All Fall Down: Staying Upright With a Neuromuscular Disease. Quest, 9:6. http://www.mda.org/publications/quest/q96fall_down.html Retrieved 11/4/11.

NINDS, (2011). Friendreich’s Ataxia Fact Sheet. National Institute of Neurological Disorders and Stroke, National Institutes of Health website. http://www.ninds.nih.gov/disorders/friedreichs_ataxia/detail_friedreichs_ataxia.htm Retrieved 11/4/11.

WebMD, (n.d.). Dizziness, Lightheadedness and Vertigo – Topic Overview. WebMD website. http://www.webmd.com/brain/tc/dizziness-lightheadedness-and-vertigo-topic-overview Retrieved 8/5/11.


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Content copyright © 2013 by Jori Reijonen, Ph.D.. All rights reserved.
This content was written by Jori Reijonen, Ph.D.. If you wish to use this content in any manner, you need written permission. Contact Jori Reijonen, Ph.D. for details.

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