| Electron microscopy, however, is essential for diagnosis, demonstrating the rods as electron-dense structures in the sarcoplasm. |
| In certain skeletal muscle fibers, namely the red or slow contracting muscle fibers, the nuclei may be found scattered throughout the sarcoplasm. |
| Within the sarcolemma is the sarcoplasm, containing all the usual subcellular elements plus long prominent myofibrils. |
| The mechanism of this defect in the organisation of the sarcoplasm still has to be elucidated. |
| The sarcoplasmic reticulum controls the level of calcium ions in the sarcoplasm. |
| Tubulofilamentous inclusions in sarcoplasm and myonuclei in combination with filamentous bundles were characteristic for myotilinopathies. |
