Myotonia Congenita (mʌɪ.oʊtoʊ.ni.ə kənˈdʒɛn.ɪ.tə) is a genetic disease that affects the muscles in the body, causing them to contract and relax more slowly than normal. The first part of the word, "myotonia," comes from the Greek words for muscle (myo) and tension (tonia), while the second part, "congenita," comes from the Latin word for "born with." The IPA phonetic transcription provides a helpful way to understand the spelling of this complex medical term, breaking it down into its component sounds and allowing for clearer communication among healthcare professionals.
Myotonia Congenita is a genetic disorder characterized by abnormal muscle stiffness and delayed relaxation after voluntary contraction or sudden movement. It is a type of myotonia, which refers to a condition where muscles are unable to relax normally after use. This condition is present from birth, hence the term "congenita" which indicates it is a congenital or inherited disorder.
The primary cause of Myotonia Congenita is a mutation in the CLCN1 gene, which affects the function of chloride channels within the muscle fiber membranes. These channels are essential for the normal contractile cycle of muscles, and a defect in them leads to the characteristic muscle stiffness observed in individuals with this condition.
Symptoms of Myotonia Congenita typically include muscle stiffness that worsens with activity, difficulty in initiating movement, and the sensation of temporarily being frozen in a specific position after an exertion. There may also be muscle pain, muscle weakness, and muscle twitches in some cases. The severity of symptoms can vary, with some individuals only experiencing mild muscle stiffness, while others may have a significant impact on their daily functioning.
While Myotonia Congenita is a chronic condition, it is not progressive and does not affect lifespan or intellectual ability. Treatment options usually focus on managing symptoms and improving mobility. Physical therapy, certain medications to relax muscles, and lifestyle modifications such as avoiding triggers that exacerbate muscle stiffness are commonly employed to alleviate symptoms and improve quality of life for individuals with Myotonia Congenita.
Thomsen's disease, an hereditary or familial disease marked by momentary tonic spasms occurring when a voluntary movement is attempted.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The term Myotonia Congenita is derived from Greek and Latin roots.
Myotonia comes from the Greek roots myo-, which means muscle, and -tonos, which means tension or tone. It refers to the condition of prolonged muscle contraction or stiffness that characterizes the disorder.
Congenita is derived from the Latin word congenitus, which means inborn or existing from birth. It indicates that the condition is present from birth.
Therefore, Myotonia Congenita literally translates to muscle stiffness from birth or inborn muscle tension.