Under the microscope, the researcher observed how the sarcolemma responded to electrical stimulation.

During the biopsy, the technician noted several irregularities in the sarcolemmas of the damaged fibers.

The dye spread sarcolemmally along the damaged fibers, tracing the path of membrane disruption.

The researchers examined sarcolemmal integrity after prolonged exercise.

Under electron microscopy, the sarcolemmata of the injured muscle fibers showed disruptions and invaginations.