Create issue ticket

26 Possible Causes for Electromyogram Abnormal, Percussion Myotonia

  • Myotonia Congenita

    The diagnosis were based upon family history, clinical findings of percussion myotonia, had grip myotania, prominent muscular hypertrophy and confirmed by electromyographic[] The electromyogram tests the electrical impulses from the affected muscles. The abnormal repetitive impulses can confirm this disease.[] Distribution/anatomy Time course Onset/age Myotonia is usually mild, approximately 50% may have percussion myotonia.[]

  • Myotonic Dystrophy

    Percussion myotonia or myotonia of grasp or both is usually present if looked for.[] The less common clinical syndromes, which include the two possible cases of myotonic dystrophy, are: (2) almost pure myotonia, symptomatic from early infancy (one case) or[]

  • Muscular Dystrophy

    Myotonia (prolonged muscle contraction) occurs spontaneously or is elicited by voluntary activity or by mild stimulation, such as tapping on a muscle (percussion myotonia)[] […] typically elicited by percussion of the thenar eminence with a tendon hammer—‘percussion myotonia’.[] Handgrip myotonia and strength may improve with repeated contractions—‘warm up phenomenon’. 28 The warm up phenomenon can also improve speech production. 29 Myotonia can be[]

  • Secondary Myopathy

    Muscle hypertrophy may be seen Grip and percussion myotonia can be seen Tx : Mexiletene.[] Although changes seen on electromyography are not pathognomonic for any specific disease process, an abnormal electromyogram can indicate if a neuropathy or neuromuscular[] electromyograms, evocative muscle biopsy and an abnormal signal on muscle magnetic resonance imaging.[]

  • Generalized Myotonia of Thomsen

    On examination he showed percussion myotonia. There was no grip myotonia or eyelid myotonia. Nerve conduction studies were normal.[] Electromyogram – Looks for muscle damage. Electrocardiogram – Checks for abnormalities in the heartbeat.[] Secondary outcomes: (1) clinical relaxation time; (2) electromyographic relaxation time; (3) stair test; (4) presence of percussion myotonia; and (5) adverse events.[]

  • Myopathy

    Myotonia can be elicited by percussion, occurs by impaired relaxation of muscle due to repetitive depolarization of the muscle.[] Electroencephalographic abnormalities have been noted in several patients with the early-onset form of the disease before clinically apparent seizure activity begins.[] Look for other associated signs including myotonia, paramyotonia, and muscle hypertrophy to exclude other non-systemic causes of muscle weakness.[]

  • Limb-Girdle Muscular Dystrophy

    Patients with myotonic dystrophy type 1 may present subtle myotonia and it may be necessary to search for tenar muscle percussion myotonia 15.[]

  • Neuromuscular Junction Disorder

    Myotonia classically improves with repeated exercise, and worsens with exposure to cold.[] Despite its importance, patients seldom complain of myotonia, and instead complain of distal weakness.[] It most commonly involves the hands, tongue, and eyelids, and can be demonstrated at the bedside by percussion of the thenar eminence, wrist extensors, or tongue.[]

  • Oppenheim Disease

    […] by cold, pressure, and percussion of enlarged muscles: later portrayed as “The Infant Hercules”.[] Myotonia congenita (Thomsen’s disease) was described by Asmus Julius Thomsen (1815–1896) in 1876 in his own family, who showed episodic myotonic contractions, precipitated[]

  • Schwartz-Jampel Syndrome

    Further investigation showed some typical facial features of the syndrome, percussion myotonia and abnormal EMG pattern characterized by continuous muscle activity at rest[] These clinical findings, along with abnormal electromyogram and muscle biopsy, are consistent with Schwartz-Jampel syndrome.[] He had diffuse muscular hypertrophy and stiffness with eyelid myotonia, tongue myotonia, percussion myotonia at thenar eminence [Figure 2] and forearm muscles.[]

Further symptoms

Similar symptoms