What is the origin of the word muscle?
19723734#3
The term muscle is derived from the Latin "musculus" meaning "little mouse" perhaps because of the shape of certain muscles or because contracting muscles look like mice moving under the skin.
The anatomy of muscles includes gross anatomy, which comprises all the muscles of an organism, and microanatomy, which comprises the structures of a single muscle.
Muscle
3225915#5
"Enthesis" is rooted in the Ancient Greek word, "ἔνθεσις" or "énthesis," meaning “putting in," or "insertion." This refers to the role of the enthesis as the site of attachment of bones with tendons or ligaments. Relatedly, in muscle terminology, the insertion is the site of attachment at the end with predominant movement or action (opposite of the origin). Thus the words ("enthesis" and "insertion" [of muscle]) are proximal in the semantic field, but "insertion" in reference to muscle can refer to any relevant aspect of the site (i.e., the attachment per se, the bone, the tendon, or the entire area), whereas "enthesis" refers to the attachment per se and to ligamentous attachments as well as tendinous ones.
Enthesis
41491826#19
The "origin" of a muscle is the bone, typically proximal, which has greater mass and is more stable during a contraction than a muscle's insertion. For example, with the latissimus dorsi muscle, the origin site is the torso, and the insertion is the arm. When this muscle contracts, normally the arm moves due to having less mass than the torso. This is the case when grabbing objects lighter than the body, as in the typical use of a lat pull down machine. This can be reversed however, such as in a chin up where the torso moves up to meet the arm.
Anatomical terms of muscle
1425466#9
The word "ciliary" had its origins around 1685–1695. The term "cilia" originated a few years later in 1705–1715, and is the Neo-Latin plural of "cilium" meaning eyelash. In Latin, "cilia" means upper eyelid and is perhaps a back formation from "supercilium", meaning eyebrow. The suffix "-ary" originally occurred in loanwords from Middle English ("-arie"), Old French ("-er", "-eer", "-ier", -"aire", -er), and Latin ("-ārius"); it can generally mean "pertaining to, connected with", "contributing to", and "for the purpose of". Taken together, "cili(a)-ary" pertains to various anatomical structures in and around the eye, namely the ciliary body and annular suspension of the lens of the eye.
Ciliary muscle
19723734#47
Schmid and Seipel argue that the origin of muscle cells is a monophyletic trait that occurred concurrently with the development of the digestive and nervous systems of all animals and that this origin can be traced to a single metazoan ancestor in which muscle cells are present. They argue that molecular and morphological similarities between the muscles cells in cnidaria and ctenophora are similar enough to those of bilaterians that there would be one ancestor in metazoans from which muscle cells derive. In this case, Schmid and Seipel argue that the last common ancestor of bilateria, ctenophora, and cnidaria was a triploblast or an organism with three germ layers and that diploblasty, meaning an organism with two germ layers, evolved secondarily due to their observation of the lack of mesoderm or muscle found in most cnidarians and ctenophores. By comparing the morphology of cnidarians and ctenophores to bilaterians, Schmid and Seipel were able to conclude that there were myoblast-like structures in the tentacles and gut of some species of cnidarians and in the tentacles of ctenophores. Since this is a structure unique to muscle cells, these scientists determined based on the data collected by their peers that this is a marker for striated muscles similar to that observed in bilaterians. The authors also remark that the muscle cells found in cnidarians and ctenophores are often contests due to the origin of these muscle cells being the ectoderm rather than the mesoderm or mesendoderm. The origin of true muscles cells is argued by others to be the endoderm portion of the mesoderm and the endoderm. However, Schmid and Seipel counter this skepticism about whether or not the muscle cells found in ctenophores and cnidarians are true muscle cells by considering that cnidarians develop through a medusa stage and polyp stage. They observe that in the hydrozoan medusa stage there is a layer of cells that separate from the distal side of the ectoderm to form the striated muscle cells in a way that seems similar to that of the mesoderm and call this third separated layer of cells the ectocodon. They also argue that not all muscle cells are derived from the mesendoderm in bilaterians with key examples being that in both the eye muscles of vertebrates and the muscles of spiralians these cells derive from the ectodermal mesoderm rather than the endodermal mesoderm. Furthermore, Schmid and Seipel argue that since myogenesis does occur in cnidarians with the help of molecular regulatory elements found in the specification of muscles cells in bilaterians that there is evidence for a single origin for striated muscle.
Muscle
5519926#1
The title likely derives from the fact that the words "muscle" and "museum" come immediately before and after the word "muse" in some dictionaries.
Muscle Museum
41491826#18
The "insertion" and "origin" of a muscle are the two places where it is anchored, one at each end. The tissue of the attachment is called an "enthesis".
Anatomical terms of muscle
18683129#0
The letter Ɱ (minuscule: ɱ), called M with hook or emg, is a letter based on the letter M. Its minuscule ɱ is used to transcribe a labiodental nasal in the International Phonetic Alphabet.
Ɱ
350105#6
In 1989, the City of Santa Monica officially rededicated the original Muscle Beach and today it serves gymnasts, acrobats and youth with an extensive gymnastics training area. Meanwhile, the City of Los Angeles Recreation and Parks Department has continued the primary barbell, weightlifting and bodybuilding aspects, and events of the original Muscle Beach fame at the Venice weight pen. In 1987, the City of Los Angeles officially dedicated "Muscle Beach Venice" with the added word of "Venice" in the title to distinguish it from the original "Muscle Beach" in Santa Monica.
Muscle Beach
14046416#2
This enzyme belongs to the family of oxidoreductases, specifically those acting on paired donors, with O2 as oxidant and incorporation or reduction of oxygen. The oxygen incorporated need not be derived from O2 with 2-oxoglutarate as one donor, and incorporation of one atom o oxygen into each donor. The systematic name of this enzyme class is N6,N6,N6-trimethyl-L-lysine,2-oxoglutarate:oxygen oxidoreductase (3-hydroxylating). Other names in common use include trimethyllysine alpha-ketoglutarate dioxygenase, TML-alpha-ketoglutarate dioxygenase, TML hydroxylase, 6-N,6-N,6-N-trimethyl-L-lysine,2-oxoglutarate:oxygen oxidoreductase, and (3-hydroxylating). This enzyme participates in lysine degradation and L-carnitine biosynthesis and requires the presence of iron and ascorbate.
Trimethyllysine dioxygenase
2513714#0
The letter Ʊ (minuscule: ʊ), called Latin upsilon, is a letter of the Latin alphabet. While its form superficially resembles an upside-down capital Greek letter omega (), it is derived from the Greek lowercase upsilon (υ).
Ʊ