External lamina is a structure similar tobasal lamina that surrounds thesarcolemma of muscle cells. It is secreted bymyocytes and consists primarily ofCollagen type IV,laminin andperlecan (heparan sulfate proteoglycan). Nerve cells, includingperineurial cells andSchwann cells also have an external lamina-like protective coating.[1]
Adipocytes also have an external lamina.
