Volume 91, August 2001

Pages 534-551: Thomas J. Hawke and Daniel J. Geary. "Myogenic satellite cells: physiology to molecular biology." In our manuscript, we state and schematically show that the basal lamina "envelopes" the satellite cell. This is incorrect as the satellite cell is situated beneath the basal lamina but above the plasmalemma of the myofiber. On p. 537, the sentence previously stating, "The defining characteristic of the satellite cell is that the basal lamina that surrounds the satellite cell and the associated myofiber is continuous" should read, "The defining characteristic of the satellite cell is that it is beneath the basal lamina but above the plasmalemma of the myofiber." A corrected Fig. 2 is also presented below.

View larger version (63K): [in this window] [in a new window]   Fig. 2.   Satellite cells occupy a sublaminar position in adult skeletal muscle. In the uninjured muscle fiber, the satellite cell is quiescent and rests in an indentation in the adult muscle fiber. The satellite cells can be distinguished from the myonuclei as it lies beneath the basal lamina but above the plasmalemma and has abundant heterochromatin. When the fiber becomes injured, the satellite cells become activated and increase their cytoplasmic content. The cytoplasmic processes allow for chemotaxis of the satellite cell along the myofiber. Bar = 1 µm.