AboutKidsHealth

 

 

MyoclonusMMyoclonusMyoclonusEnglishNeurologyChild (0-12 years);Teen (13-18 years)BodyBrain;Spinal CordConditions and diseasesCaregivers Adult (19+)NA2010-04-08T04:00:00ZTeesta Soman, FAAP, DABPN, MBA9.0000000000000053.0000000000000630.000000000000Health (A-Z) - ConditionsHealth A-Z<p>Learn about myoclonus, a movement disorder that can affect children. </p><h2>What is myoclonus?</h2> <p>Myoclonus (say: my-oh-KLOH-nus) is the sudden and rapid twitching of a muscle or a group of muscles. The twitching is caused by uncontrolled muscle contraction or relaxation. </p> <p>Myoclonus twitches often occur when children start a movement like walking or kicking a soccer ball. They may happen in response to external stimuli such as flashing lights. More than one twitch could happen at the same time. Twitches may occur in a series or even follow a distinct pattern. The twitches can occur in the neck, back, face, arms, legs or the entire body. </p><h2>Key points</h2> <ul> <li>Myoclonus is the sudden and rapid twitching of a muscle or a group of muscles. </li> <li>Myoclonus is a sign of a condition affecting the brain and spinal cord. </li> <li>In milder cases of myoclonus, children have a single muscle contraction followed by relaxation and a loss of muscle tone. </li> <li>In more severe cases of myoclonus, groups of muscles contract involuntarily throughout the body. </li> <li>Myoclonus is treated with drugs that slow down the central nervous system. </li> </ul><h2>Myoclonus is caused by conditions that affect the brain</h2> <p>Myoclonus is a sign of a condition affecting the brain and spinal cord. For example, it is a common symptom in epilepsy. Myoclonus can also be caused by brain tumours, head or spinal cord injuries and stroke. Other causes include infections, kidney or liver failure, lipid storage disease, lack of oxygen to the brain and chemical and drug poisoning. </p> <p>Exactly how these conditions cause myoclonus is not fully known. Parts of the brain control muscles throughout the body, so myoclonus may be linked to abnormal chemical levels in the brain. </p><h2>Treatment of myoclonus with medicines</h2> <p>Myoclonus is mainly treated with barbiturates. This class of drugs helps to reduce symptoms by slowing down the central nervous system. Side effects include drowsiness and loss of coordination. <a href="/Article?contentid=107&language=English">Clonazepam</a> is an example of a barbiturate usually used for treatment. A doctor will prescribe a specific drug depending on the type of myoclonus and its cause. </p> <p>Sometime a doctor may prescribe more than one drug. This is because myoclonus can be caused by abnormalities in different areas of the brain. Different drugs target different brain areas. </p>
MyoclonieMMyoclonieMyoclonusFrenchNeurologyChild (0-12 years);Teen (13-18 years)BodyBrain;Spinal CordConditions and diseasesCaregivers Adult (19+)NA2010-04-08T04:00:00ZTeesta Soman, FAAP, DABPN, MBA9.0000000000000053.0000000000000630.000000000000Health (A-Z) - ConditionsHealth A-Z<p>Cette page traite de la myoclonie, un trouble du mouvement qui peut toucher les enfants.</p><h2>Qu’est-ce que la myoclonie?</h2> <p>La myoclonie est une secousse musculaire soudaine et rapide d’un muscle ou d’un groupe de muscles. Les secousses sont causées par des contractions ou un relâchement musculaire incontrôlé. </p> <p>Les secousses se produisent quand les enfants font un mouvement comme marcher ou donner un coup de pied dans un ballon de soccer. Il s’agit d’une réaction aux stimuli externes, comme des lumières qui oscillent. Plus d’une secousse peut se produire en même temps. Les secousses peuvent se produire en série ou même suivre un rythme distinct. Les secousses peuvent survenir dans le cou, le dos, le visage, les bras, les jambes ou le corps entier.</p><h2>À retenir</h2> <ul> <li>La myoclonie est une secousse musculaire soudaine et rapide d’un muscle ou d’un groupe de muscles.</li> <li>La myoclonie est un signe d’un trouble qui touche le cerveau et la moelle épinière.</li> <li>Dans les cas plus légers, les enfants ont une seule contraction musculaire suivie d’une relaxation et d’une perte de tonus.</li> <li>Dans les cas plus graves, des groupes de muscles se contractent involontairement dans tout le corps.</li> <li>La myoclonie est traitée au moyen de médicaments qui ralentissent le système nerveux central.</li> </ul><h2>La myoclonie est causée par des troubles qui touchent le cerveau</h2> <p>La myoclonie est un trouble qui touche le cerveau et la moelle épinière. Par exemple, c’est un symptôme fréquent de l’épilepsie. La myoclonie peut aussi être causée par des tumeurs au cerveau, des lésions à la tête ou à la moelle épinière et des AVC. Des infections, des insuffisances rénales ou hépatiques, un trouble de stockage des lipides, le manque d’oxygène au cerveau et un empoisonnement aux produits chimiques ou aux médicaments peuvent aussi en expliquer l’origine.</p> <p>Nous ne savons pas exactement comment ces troubles causent une myoclonie. Des parties du cerveau contrôlent les muscles de tout le corps; la myoclonie pourrait donc être liée à des niveaux chimiques anormaux dans le cerveau.</p><h2>Traitement de la myoclonie avec des médicaments</h2> <p>La myoclonie est principalement traitée au moyen de barbituriques. Cette classe de médicaments aide à réduire les symptômes en ralentissant le système nerveux central. Au nombre des effets secondaires, on trouve la somnolence et la perte de coordination. Le clonazépam est un exemple de barbituriques dont on se sert habituellement. Un médecin prescrira un médicament en particulier selon le type de myoclonie et sa cause.</p> <p>Parfois, le médecin peut prescrire plus d’un médicament; la myoclonie peut être attribuable à des anomalies dans différentes parties du cerveau, et des médicaments différents ciblent différentes parties du cerveau.</p>

 

 

Myoclonus851.000000000000MyoclonusMyoclonusMEnglishNeurologyChild (0-12 years);Teen (13-18 years)BodyBrain;Spinal CordConditions and diseasesCaregivers Adult (19+)NA2010-04-08T04:00:00ZTeesta Soman, FAAP, DABPN, MBA9.0000000000000053.0000000000000630.000000000000Health (A-Z) - ConditionsHealth A-Z<p>Learn about myoclonus, a movement disorder that can affect children. </p><h2>What is myoclonus?</h2> <p>Myoclonus (say: my-oh-KLOH-nus) is the sudden and rapid twitching of a muscle or a group of muscles. The twitching is caused by uncontrolled muscle contraction or relaxation. </p> <p>Myoclonus twitches often occur when children start a movement like walking or kicking a soccer ball. They may happen in response to external stimuli such as flashing lights. More than one twitch could happen at the same time. Twitches may occur in a series or even follow a distinct pattern. The twitches can occur in the neck, back, face, arms, legs or the entire body. </p><h2>Many types of myoclonus</h2> <h3>Mild and severe</h3> <p>In milder cases of myoclonus, children have a single muscle contraction followed by relaxation and a loss of muscle tone. This usually happens while the child begins to fall asleep and in this context, the movment is called "hypnic jerk" Myoclonus can also happen in normal, healthy children and causes no difficulties. </p> <p>In more severe cases of myoclonus, groups of muscles contract involuntarily throughout the body. This can prevent children from carrying out normal activities such as gripping objects. </p> <h3>Myoclonus: named by cause</h3> <p>The different types of myoclonus are named depending on their cause.</p> <ul> <li>Action myoclonus is triggered or made worse when a child'starts a movement. It usually occurs due to a lack of oxygen to the brain. </li> <li>Sleep myoclonus is a mild form that occurs as the person falls asleep. Sleep myoclonus can also take more severe forms including restless leg syndrome. </li> <li>Stimulus-sensitive myoclonus is triggered by external stimuli such as light, noise and movement. </li> <li>Asterixis (negative myoclonus) is a sudden involuntary relaxation of a muscle. </li> <li>Polymyoclonus occurs when multiple twitches occur throughout the body. </li> <li>Palatal myoclonus is the rhythmic contraction of the muscles at the roof of the mouth (the soft palate). </li> <li>Myoclonus can be related to epilepsy and seizures. This is called epileptic myoclonus. </li> </ul> <p>Myoclonus types are also named depending on the area of the brain that is affecting movement:</p> <ul> <li>Cortical myoclonus is caused by abnormalities in the cerebral cortex, which is the outer layer of the brain. </li> <li>Subcortical myoclonus is caused by abnormalities in the deep portions of the brain or brainstem. </li> <li>Spinal myoclonus is caused by abnormalities within the spinal cord. </li> </ul><h2>Key points</h2> <ul> <li>Myoclonus is the sudden and rapid twitching of a muscle or a group of muscles. </li> <li>Myoclonus is a sign of a condition affecting the brain and spinal cord. </li> <li>In milder cases of myoclonus, children have a single muscle contraction followed by relaxation and a loss of muscle tone. </li> <li>In more severe cases of myoclonus, groups of muscles contract involuntarily throughout the body. </li> <li>Myoclonus is treated with drugs that slow down the central nervous system. </li> </ul><h2>Myoclonus is caused by conditions that affect the brain</h2> <p>Myoclonus is a sign of a condition affecting the brain and spinal cord. For example, it is a common symptom in epilepsy. Myoclonus can also be caused by brain tumours, head or spinal cord injuries and stroke. Other causes include infections, kidney or liver failure, lipid storage disease, lack of oxygen to the brain and chemical and drug poisoning. </p> <p>Exactly how these conditions cause myoclonus is not fully known. Parts of the brain control muscles throughout the body, so myoclonus may be linked to abnormal chemical levels in the brain. </p><h2>Treatment of myoclonus with medicines</h2> <p>Myoclonus is mainly treated with barbiturates. This class of drugs helps to reduce symptoms by slowing down the central nervous system. Side effects include drowsiness and loss of coordination. <a href="/Article?contentid=107&language=English">Clonazepam</a> is an example of a barbiturate usually used for treatment. A doctor will prescribe a specific drug depending on the type of myoclonus and its cause. </p> <p>Sometime a doctor may prescribe more than one drug. This is because myoclonus can be caused by abnormalities in different areas of the brain. Different drugs target different brain areas. </p>Myoclonus

Thank you to our sponsors

AboutKidsHealth is proud to partner with the following sponsors as they support our mission to improve the health and wellbeing of children in Canada and around the world by making accessible health care information available via the internet.