Rectus
Usually refers to the rectus abdominis, a large muscle in the front of the abdomen that assists in the regular breathing movement and supports the muscles of the spine while lifting and keeping abdominal organs such as the intestines in place. The rectus abdominis plays a key role in "sit-ups." Rectus means straight. The rectus abdominis is a straight abdominal muscle.

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rec·tus 'rek-təs n, pl rec·ti -.tī
1) any of several straight muscles (as the rectus abdominis or the rectus femoris)
2) any of four muscles of the eyeball that arise from the border of the optic foramen and run forward to insert into the sclera of the eyeball:
a) one that is the thinnest and narrowest and inserts into the superior aspect of the sclera called also rectus superior, superior rectus
b) one that is the longest, arises by two heads, and inserts into the lateral aspect of the sclera called also lateral rectus, rectus lateralis
c) one that is the broadest and inserts into the medial aspect of the sclera called also medial rectus, rectus medialis
d) one that inserts into the inferior aspect of the sclera called also inferior rectus, rectus inferior

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n.
any of several straight muscles. The rectus muscles of the orbit are some of the extrinsic eye muscles. Rectus abdominis is a long flat muscle that extends bilaterally along the entire length of the front of the abdomen. The rectus muscles acting together serve to bend the trunk forwards; acting separately they bend the body sideways. The rectus femoris forms part of the quadriceps.

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rec·tus (rekґtəs) [L.] straight; anatomical terminology for a straight structure, such as a muscle (see entries beginning musculus rectus).

Medical dictionary. 2011.

Look at other dictionaries:

  • rectus — [rek′təs] n. pl. recti [rek′tī΄] [ModL < L rectus (musculus), lit., straight (muscle): see RECTI ] any of various straight muscles, as of the eye, neck, or thigh …   English World dictionary

  • Rectus — Rec tus ( t?s), n.; pl. {Recti} ( t?). [NL., fr. L. regere to keep straight.] (Anat.) A straight muscle; as, the recti of the eye. [1913 Webster] …   The Collaborative International Dictionary of English

  • Rectus — (lat.), 1) gerade; 2) gerader Muskel, so R. abdomĭnis, Bauchmuskel; R. cruris, Schenkelmuskel …   Pierer's Universal-Lexikon

  • rectus — index direct (forthright), proper, right (righteousness) Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • RECTUS — via Damasci, Euthia Graecis …   Hofmann J. Lexicon universale

  • Rectus — Als Rektus [ˈrɛktʊs] (eigentlich lat.: Casus rectus „gerader Kasus/Fall“) wird ein Kasus bezeichnet, in dem üblicherweise das Subjekt des Satzes steht – der „Rektus“ wäre im Deutschen also der Nominativ. Die Bezeichnung „gerader Kasus“ geht auf… …   Deutsch Wikipedia

  • rectus — n. any of several straight muscles. The rectus muscles of the orbit are some of the extrinsic eye muscles. Rectus abdominis is a long flat muscle that extends bilaterally along the entire length of the front of the abdomen. The rectus muscles… …   The new mediacal dictionary

  • rectus — rẹctus, ...ta, ...tum [aus gleichbed. lat. rectus]: gerade; z. B. in der Fügung ↑Musculus rectus abdominis (Anat.) …   Das Wörterbuch medizinischer Fachausdrücke

  • rectus — noun (plural recti) Etymology: New Latin, from rectus musculus straight muscle Date: circa 1704 any of several straight muscles (as of the abdomen) …   New Collegiate Dictionary

  • rectus — /rek teuhs/, n., pl. recti / tuy/. Anat. any of several straight muscles, as of the abdomen, thigh, eye, etc. [1695 1705; < NL rectus (musculus) straight (muscle)] * * * …   Universalium

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