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- $Unique_ID{BRK03857}
- $Pretitle{}
- $Title{Hypotonia, Benign Congenital}
- $Subject{Hypotonia Benign Congenital Congenital Muscle Hypotonia Congenital
- Muscle Weakness Floppy Baby Floppy Infant }
- $Volume{}
- $Log{}
-
- Copyright (C) 1987, 1989 National Organization for Rare Disorders, Inc.
-
- 329:
- Hypotonia, Benign Congenital
-
- ** IMPORTANT **
- It is possible the main title of the article (Benign Congenital
- Hypotonia) is not the name you expected. Please check the SYNONYMS listing
- to find the alternate names and disorder subdivisions covered by this
- article.
-
- Synonyms
-
- Congenital Muscle Hypotonia
- Congenital Muscle Weakness
- Floppy Baby
- Floppy Infant
-
- General Discussion
-
- ** REMINDER **
- The information contained in the Rare Disease Database is provided for
- educational purposes only. It should not be used for diagnostic or treatment
- purposes. If you wish to obtain more information about this disorder, please
- contact your personal physician and/or the agencies listed in the "Resources"
- section of this report.
-
-
- Benign Congenital Hypotonia is a nonprogressive neuromuscular disorder
- which occurs at birth. This condition is characterized by decreased muscle
- tone that is manifested as muscle weakness or "floppiness." The condition
- can occur as a disorder of unknown cause, or as a symptom of other
- neuromuscular diseases.
-
- Symptoms
-
- Babies affected by Benign Congenital Hypotonia show signs of weakness of the
- skeletal muscles. The babies look "floppy" and weak. The disorder is not
- progressive, and in many cases the symptoms improve with maturity of the
- central nervous system.
-
- Causes
-
- The cause of Benign Congenital Hypotonia is generally not known. It is an
- inborn disorder. Hypotonia can be a symptom caused by another disorder, as
- well as a condition without apparent cause. It has been postulated that this
- condition may involve various patterns of fiber-type disproportion in
- muscles. In many cases the symptoms of another disorder may appear later in
- the child's life.
-
- Hypotonia is also a common characteristic of premature infants that
- occurs as a result of immature brain structures. The weakness gradually
- regresses with maturity in most cases.
-
- Affected Population
-
- Onset of Benign Congenital Hypotonia occurs at birth and affects both males
- and females.
-
- Related Disorders
-
- Infantile Muscular Atrophy (Werdnig-Hoffman disease) is a severe and usually
- progressive neuromuscular disorder occurring in infants. It is characterized
- by a generalized flaccid atrophy and weakness of the muscles of the trunk and
- extremities. This disorder results from degenerative changes in the central
- horn cells of the spinal cord. The weakness, also referred to as the
- amyotonia congenital syndrome, is also found in other neuromuscular
- disorders. (For more information, choose "Werdnig" as your search term in
- the Rare Disease Database.)
-
- Nemaline Myopathy (Rod Myopathy or Congenital Rod Disease) is a
- hereditary muscular disorder characterized by weakness and flaccidity of
- skeletal muscles. The disorder derives its name from the presence of very
- fine threads or rods in microscopically small muscle fibers. (For more
- information, choose "nemaline myopathy" as your search term in the Rare
- Disease Database.)
-
- Therapies: Standard
-
- Treatment of Benign Congenital Hypotonia is symptomatic and supportive.
- Physical therapy may also be beneficial. In many cases the symptoms improve
- with maturity of the central nervous system.
-
- Therapies: Investigational
-
- Treatment of Benign Congenital Hypotonia with the experimental antimyotonic
- drug mexiletine shows promise.
-
- This disease entry is based upon medical information available through
- April 1989. Since NORD's resources are limited, it is not possible to keep
- every entry in the Rare Disease Database completely current and accurate.
- Please check with the agencies listed in the Resources section for the most
- current information about this disorder.
-
- Resources
-
- For more information on Benign Congenital Hypotonia, please contact:
-
- National Organization for Rare Disorders (NORD)
- P.O. Box 8923
- New Fairfield, CT 06812-1783
- (203) 746-6518
-
- Families of Spinal Muscular Atrophy
- P.O. Box 1465
- Highland Park, IL 60035
- (708) 432-5551
-
- Muscular Dystrophy Association, National Office
- 3300 E. Sunrise Dr.
- Tucson, AZ 85718
- (602) 529-2000
-
- NIH/National Institute of Neurological Disorders & Stroke (NINDS)
- 9000 Rockville Pike
- Bethesda, MD 20892
- (301) 496-5751
- (800) 352-9424
-
- For information on genetics and genetic counseling referrals, please
- contact:
-
- March of Dimes Birth Defects Foundation, Inc.
- 1275 Mamaroneck Ave.
- White Plains, NY 10605
- (914) 428-7100
-
- Alliance of Genetic Support Groups
- 35 Wisconsin Circle, Suite 440
- Chevy Chase, MD 20815
- (800) 336-GENE
- (301) 652-5553
-
-