| incudal fold | A variable fold of mucosa that passes from the roof of the tympanic cavity to the body and short limb of the incus. Synonym: plica incudis. (05 Mar 2000) |
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| inferior duodenal fold | A fold of peritoneum bounding the inferior duodenal recess. Synonym: plica duodenalis inferior, plica duodenomesocolica, duodenomesocolic fold. (05 Mar 2000) |
| infrapatellar synovial fold | A fold of synovial membrane extending from below the level of the articular surface of the patella to the anterior part of the intercondylar fossa. Synonym: plica synovialis infrapatellaris, plica synovialis patellaris. (05 Mar 2000) |
| inguinal aponeurotic fold | Common tendon of insertion of the transversus and obliquus internus muscles into the crest and spine of the pubis and iliopectineal line; it is frequently muscular rather than aponeurotic and may be poorly developed; forms posterior wall of medial inguinal canal. See: aponeurosis of internal abdominal oblique muscle. Synonym: falx inguinalis, tendo conjunctivus, conjoined tendon, falx aponeurotica, inguinal aponeurotic fold. Contracted tendon, a condition of young horses in which the flexor tendon's of the leg are shortened. (05 Mar 2000) |
| inguinal fold | An embryonic mesodermal thickening that joins the caudal end of the urogenital ridge to the anterior abdominal wall; the gubernaculum of the testis develops in it. Synonym: inguinal fold. (05 Mar 2000) |
| interureteric fold | A fold of mucous membrane extending from the orifice of the ureter of one side to that of the other side. Synonym: plica interureterica, bar of bladder, Mercier's bar, plica ureterica, torus uretericus, ureteric fold. (05 Mar 2000) |
| opercular fold | Tissue forming a bridge or an adhesion between the tonsil and the anterior pillar of the fauces. (05 Mar 2000) |
| tail fold | The ventral folding of the caudal extremity of the embryonic disk. (05 Mar 2000) |
| tarsal fold | The fold marking the attachment of the levator palpebrae superioris muscle into the skin of the upper eyelid. (05 Mar 2000) |
| transverse palatine fold | A masticatory vestige on the hard palate; one of several irregular, sometimes branching, crests of soft tissue that radiate from the region of the incisive papillae at their most anterior parts and extend a slight distance backward, crossing the hard palate and reaching laterally for variable distances. Synonym: plica palatina transversa, ruga palatina, transverse palatine ridge. (05 Mar 2000) |
| transverse vesical fold | A duplication of peritoneum passing over the empty bladder, but obliterated when the viscus is full. Synonym: plica vesicalis transversa. (05 Mar 2000) |
| Treves' fold | A fold of peritoneum bounding the ileocaecal or ileoappendicular fossa. Synonym: plica ileocaecalis, Treves' fold. (05 Mar 2000) |
| triangular fold | A fold of mucous membrane anterior to the palatine tonsil arising from the palatoglossal arch. Synonym: plica triangularis. (05 Mar 2000) |
| epicanthal fold | A fold of skin that comes down across the inner angle of the eye. The epicanthal fold is more common in children with Down syndrome and other birth defects than normal children and so is of value in diagnosis. Although some dictionaries state that this eye fold is found in peoples of Asian origin, this is not true. The normal Asian eyefold is continuous with the lower edge of the upper eyelid and actually appears distinctly different than a true epicanthal fold. (12 Dec 1998) |
| epigastric fold | The ridge on the peritoneal surface of the anterior abdominal wall formed by the inferior epigastric vessels. Synonym: plica umbilicalis lateralis, epigastric fold, plica epigastrica. (05 Mar 2000) |