Lihaseseina

Lihaseseina is a Finnish compound word formed from lihas (muscle) and seina (wall or sheath). The term is not part of the standard formal anatomy vocabulary in Finnish medical dictionaries, and its precise meaning can vary across sources. In many cases, it appears in popular science or in translations where a general notion of a boundary or surrounding layer of muscle tissue is intended, rather than a fixed anatomical term.

Possible interpretations of lihaseseina include: a reference to the cell membrane of a muscle cell, known as the sarcolemma in biology; or a more general, non-technical way of describing the connective tissue envelopes that organize muscle tissue. In anatomy, these envelopes are the endomysium (around individual muscle fibers), the perimysium (around fiber bundles), and the epimysium (around the entire muscle). Depending on context, lihaseseina may be used to denote one of these boundaries or, more loosely, a muscular boundary within an organ.

Because the term is not standardized, its exact meaning should be inferred from the source in which it appears. In formal scientific writing, it is advisable to use established terms such as sarcolemma for the muscle cell membrane and endomysium, perimysium, and epimysium for connective tissue sheaths.

See also: sarcolemma; endomysium; perimysium; epimysium; muscularis externa.