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32 Possible Causes for Percussion Myotonia of the Thenar Eminence

  • Myotonic Dystrophy

    Myotonic Dystrophy type 2 (DM2) is a multisystemic disorder associated with an expanded [CCTG]n repeat in intron 1 of the CNBP gene. Epigenetic modifications have been reported in many repeat expansion disorders, including myotonic dystrophy type 1 (DM1), either as a mechanism to explain somatic repeat instability[…][ncbi.nlm.nih.gov]

  • 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.[amhsjournal.org]

  • Acetazolamide

    Additional clinical signs include generalized muscle hypertrophy, percussion myotonia of proximal upper extremity muscles, thenar eminence and tongue and myotonia in the eyelids[orpha.net]

  • Paramyotonia Congenita

    myotonia over the thenar eminence.[mja.com.au] […] used to test for percussion myotonia.[now.aapmr.org] Physical examination of the patient and five affected family members revealed that all had paradoxical myotonia of the orbicularis oculi muscles and the hands, and percussion[mja.com.au]

  • Oculopharyngodistal Myopathy

    myotonia: delayed relaxation following percussion of the thenar eminence Grip myotonia: delayed relaxation of firm handshake Reflexes depressed Gait: high steppage (foot[evidencereviewed.com] Myotonia, which usually appears by age 5 years, is demonstrable by percussion of the thenar eminence, the tongue, and wrist extensor muscles.[clinicalgate.com] May have weakness of neck flexion Distal weakness, especially of intrinsic muscles of the hand, finger flexors, elbow extensors and ankle dorsiflexors (causing foot drop) Percussion[evidencereviewed.com]

  • Autosomal Dominant Myoglobinuria

    Percussion myotonia is commonly tested by tapping the thenar eminence with a reflex hammer.[sites.google.com] Patients are usually quite muscular for her age, demonstrates percussion myotonia at the thenar eminence, and have full muscle strength throughout.[sites.google.com] Mild clinical myotonia can be elicited in the face (eyelids), tongue, forearms (finger extensors) and the thenar eminence with percussion or activity.[sites.google.com]

  • Autosomal Dominant Centronuclear Myopathy

    Percussion myotonia is commonly tested by tapping the thenar eminence with a reflex hammer.[sites.google.com] Patients are usually quite muscular for her age, demonstrates percussion myotonia at the thenar eminence, and have full muscle strength throughout.[sites.google.com] Mild clinical myotonia can be elicited in the face (eyelids), tongue, forearms (finger extensors) and the thenar eminence with percussion or activity.[sites.google.com]

  • Distal Myopathy

    Percussion myotonia is commonly tested by tapping the thenar eminence with a reflex hammer.[sites.google.com] Patients are usually quite muscular for her age, demonstrates percussion myotonia at the thenar eminence, and have full muscle strength throughout.[sites.google.com] Mild clinical myotonia can be elicited in the face (eyelids), tongue, forearms (finger extensors) and the thenar eminence with percussion or activity.[sites.google.com]

  • Centronuclear Myopathy Type 4

    Percussion myotonia is commonly tested by tapping the thenar eminence with a reflex hammer.[sites.google.com] Patients are usually quite muscular for her age, demonstrates percussion myotonia at the thenar eminence, and have full muscle strength throughout.[sites.google.com] Mild clinical myotonia can be elicited in the face (eyelids), tongue, forearms (finger extensors) and the thenar eminence with percussion or activity.[sites.google.com]

  • Secondary Myopathy

    Percussion myotonia is commonly tested by tapping the thenar eminence with a reflex hammer.[sites.google.com] Patients are usually quite muscular for her age, demonstrates percussion myotonia at the thenar eminence, and have full muscle strength throughout.[sites.google.com] Mild clinical myotonia can be elicited in the face (eyelids), tongue, forearms (finger extensors) and the thenar eminence with percussion or activity.[sites.google.com]

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