| Type | MGI:General | Description | electron microscopy shows an accumulation of small pools of non-membrane-bound glycogen from 14 days of age on in both type 1 and type 2 fibers, and membrane-bound vacuoles of variable size and form with finely granular contents are found beginning at 2 weeks of age in the type 1 fibers of the soleus but not extensor digitorum longus |
