Rod myopathy
Overview
one of a group of diseases that cause problems with the tone and contraction of skeletal muscles
Symptoms
* Floppy muscles * Thin thighs * Thin upper arms * Weak thighs * Weak upper arms * Weak trunk muscles * Absence of deep tendon reflexes * Impaired muscle tone * Soft muscles * Shoulder weakness * Pelvic girdle weakness
Causes
variety of genetic defects, each one affecting one of the filament proteins required for muscle tone and contraction