## Abstract Myotonia congenita is a hereditary chloride channel disorder characterized by delayed relaxation of skeletal muscle (myotonia). It is caused by mutations in the skeletal muscle chloride channel gene __CLCN1__ on chromosome 7. The phenotypic spectrum of myotonia congenita ranges from mil
MYOTONIA CONGENITA IN PREGNANCY
β Scribed by C. A. Hakim; J. Thomlinson
- Book ID
- 111149962
- Publisher
- John Wiley and Sons
- Year
- 1969
- Tongue
- English
- Weight
- 143 KB
- Volume
- 76
- Category
- Article
- ISSN
- 1470-0328
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We investigated electrophysiologically the unaffected parents of patients with recessive myotonia congenita. We studied 18 families, in nine of which the diagnosis was confirmed by molecular genetics. Brief myotonic discharges were present in at least one parent in 67% of the families. Fathers were
## Abstract Compound muscle action potential (CMAP) amplitudes, response to 2 Hz nerve stimulation, response to exercise and electromyographic needle electrode examination findings from the thenar muscles of two patients with paramyotonia congenita were compared with those from two patients with do
Fenoterol is used in patients with premature labor to delay delivery. A young women treated with fenoterol developed severe generalized myotonia. Symptoms disappeared after medication had been stopped. In a later study myotonic discharges were found electromyographically in the muscles of the patien
The maximum force of voluntary muscle contraction was registered under isometric conditions in nine patients with recessive myotonia congenita. The recordings were made on the upper arm. Five patients with severe myotonia had a transient weakness after muscle rest. Electromyographic registrations wi