tubercle (redirected from Mental tubercle)

tubercle /tu·ber·cle/ (-k'l)

1. any small, rounded mass produced by infection with Mycobacterium tuberculosis.

2. a nodule or small eminence, especially one on a bone for attachment of a tendon.

3. the cusp of a tooth.

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anatomical tubercle  tuberculosis verrucosa cutis.

auricular tubercle , auricular tubercle of Darwin, darwinian tubercle a small projection sometimes found on the edge of the helix; conjectured by some to be a relic of simioid ancestry.

Farre's tubercles  masses beneath the capsule of the liver in some cases of hepatocellular carcinoma.

fibrous tubercle  one of bacillary origin which contains connective-tissue elements.

genial tubercle, inferior  inferior mental spine.

genial tubercle, superior  superior mental spine.

genital tubercle  an eminence ventral to the cloaca in the early embryo; the primordium of the penis or clitoris.

Ghon tubercle  see under focus.

gracile tubercle  an enlargement of the fasciculus gracilis in the medulla oblongata, produced by the underlying nucleus gracilis.

intervenous tubercle  a ridge across the inner surface of the right atrium between the openings of the venae cavae.

Lisfranc's tubercle  an eminence on the first rib, for attachment of the anterior scalene muscle.

Lower's tubercle  intervenous t.

mental tubercle  a prominence on the inner border of either side of the mental protuberance of the mandible.

miliary tubercle  one of the many minute tubercles formed in many organs in acute miliary tuberculosis.

pubic tubercle of pubic bone  a prominent tubercle at the lateral end of the pubic crest.

scalene tubercle  Lisfranc's t.

supraglenoid tubercle  one on the scapula for attachment of the long head of the biceps.

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tu·ber·cle (tbr-kl)

n.

1. An anatomical nodule. Also called tuberculum.

2. A small elevation on the surface of a tooth.

3. A nodule or swelling, especially a mass of lymphocytes and epithelioid cells forming the characteristic granulomatous lesion of tuberculosis.

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tubercle (too´burkl),

n 1. a small rounded nodule or elevation on the surface of the skin, bone, or other tissue.
2. the accessory cusps on the cingulum of certain anterior teeth or occlusal tables of permanent molars.

tubercle, genial

n (geniohyoid tubercle), a small rounded elevation on the lingual surface of the mandible on either side of the midline near the inferior border of the body of the mandible, serving as a point of insertion for the geniohyoid muscles.

tubercle, geniohyoid

n See tubercle, genial.

tubercle, superior genial,

n the small spines on the lingual surface of the mandible that serve as the attachment for the genioglossus muscles. On resorbed mandibles, these tubercles may be at or above the crest of the residual ridge.

tubercle of the upper lip (superior labial),

n midline thickening of the superior lip.

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tubercle

1. a small, rounded nodule produced by the bacillus of tuberculosis (Mycobacterium bovis). It is made up of small spherical masses that contain giant cells and are surrounded by spindle-shaped epithelioid cells.

2. a nodule or small eminence, especially one on a bone, for attachment of a tendon. See also cuneate tubercle.

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dysgonic tubercle (1)

one from which it is difficult to culture mycobacteria, typical of Mycobacterium bovis.

eugonic tubercle (1)

one from which mycobacteria can be isolated with ease. Typical of Mycobacterium avium.

fibrous tubercle (1)

a tubercle of bacillary origin that contains connective tissue elements.

genital tubercle

see phallic tubercle (below).

gracile tubercle

a small swelling; used as an anatomical landmark; also an attachment for the gracilis nucleus in the medulla oblongata.

humerus tubercle

the point of the shoulder; the greater tubercle on the head of the humerus.

intercondylar t's

situated on the intercondylar eminence on the head of the tibia, there are medial and lateral tubercles. Called also intercondylar eminences.

intermediate humerus tubercle

a small ridge between the greater and lesser tubercles of the horse's humerus; it serves to restrain the bicipital tendon.

intervenous tubercle

a fold on the inner wall of the right atrium, directing the flow of blood from the venae cavae to the atrioventricular opening.

miliary tubercle

one of the many minute tubercles formed in many organs in acute miliary tuberculosis.

phallic tubercle

primordia of the penis; called also genital tubercle.

pubic tubercle

a prominent tubercle at the lateral end of the pubic crest.

supraglenoid tubercle

a tubercle on the scapula for attachment of the biceps muscle.