false joint

joint (joint) the site of junction or union between bones, especially one that allows motion of the bones.

Various kinds of joints. Fibrous: A, syndesmosis (tibiofibular); B, suture (skull). Cartilaginous: C, symphysis (vertebral bodies); D, synchondrosis (first rib and sternum). Synovial: E, condyloid (wrist); F, gliding (radioulnar); G, hinge or ginglymus (elbow); H, ball and socket (hip); I, saddle (carpometacarpal of thumb); J, pivot (atlantoaxial).

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amphidiarthrodial joint  amphidiarthrosis.

arthrodial joint  plane j.

ball-and-socket joint  spheroidal j.

biaxial joint  one with two chief axes of movement, at right angles to each other.

bicondylar joint  a condylar joint with a meniscus between the articular surfaces, such as the temporomandibular joint.

bilocular joint  one with two synovial compartments separated by an interarticular cartilage.

cartilaginous joint  a type of synarthrosis in which the bones are united by cartilage.

Charcot's joint  neuropathic arthropathy.

Chopart's joint  one between the calcaneus and the cuboid bone and the talus and navicular bone.

cochlear joint  a hinge joint that permits some rotation or lateral motion.

composite joint , compound joint one in which several bones articulate.

condylar joint , condyloid joint ellipsoidal joint; one in which an ovoid head of one bone moves in an elliptical cavity of another, permitting all movements except axial rotation.

diarthrodial joint  synovial j.

elbow joint  the articulation between the humerus, ulna, and radius.

ellipsoidal joint  condylar j.

enarthrodial joint  spheroidal j.

facet joints  the articulations of the vertebral column.

false joint  pseudarthrosis.

fibrocartilaginous joint  symphysis.

fibrous joint  a type of synarthrosis in which the bones are united by continuous intervening fibrous tissue.

flail joint  an unusually mobile joint.

ginglymoid joint  ginglymus.

gliding joint  plane j.

hinge joint  ginglymus.

hip joint  the spheroidal joint between the head of the femur and the acetabulum of the hip bone.

immovable joint  fibrous j.

intercarpal joints  the articulations between the carpal bones.

knee joint  the compound joint between the femur, patella, and tibia.

Lisfranc's joint  the articulation between the tarsal and metatarsal bones.

mixed joint  one combining features of different types of joints.

multiaxial joint  spheroidal j.

neurocentral joint  a synchondrosis between the body of a vertebra and either half of the vertebral arch.

peg-and-socket joint  gomphosis.

pivot joint  a uniaxial joint in which one bone pivots within a bony or an osseoligamentous ring.

plane joint  a synovial joint in which the opposed surfaces are flat or only slightly curved.

polyaxial joint  spheroidal j.

rotary joint  pivot j.

saddle joint  one having two saddle-shaped surfaces at right angles to each other.

simple joint  one in which only two bones articulate.

spheroidal joint  ball-and-socket joint; a synovial joint in which a round surface on one bone (“ball”) moves within a concavity (“socket”) on the other bone.

spiral joint  cochlear j.

synarthrodial joint  fibrous j.

synovial joint  diarthrosis; a joint that permits more or less free motion, the union of the bony elements being surrounded by an articular capsule enclosing a cavity lined by synovial membrane.

temporomandibular joint  a bicondylar joint formed by the head of the mandible and the mandibular fossa, and the articular tubercle of the temporal bone.

trochoid joint  pivot j.

uniaxial joint  one which permits movement in one axis only.

unilocular joint  a synovial joint having only one cavity.

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false joint

n.

A bony junction, usually occurring at the site of a poorly united fracture, that allows abnormal motion. Also called pseudarthrosis.

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false joint

Etymology: L, fallere, to deceive, jungere, to join

a joint that develops at the site of a former fracture. Also called nonunion, pseudoarthrosis.

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false

said of diseases or plants that have a superficial resemblance to another plant or disease.

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false acacia

see robinia pseudoacacia.

false blackleg

cellulitis and myositis caused by Clostridium septicum and C. novyi. More commonly called malignant edema. Characterized by high fever, severe toxemia and local swelling around a wound with subsequent local gangrene and a high mortality rate.

false blusher

see amanitapantherina—a mushroom.

false buckbush

see gyrostemonaustralasicus.

false bursa

see hygroma.

false castor oil plant

daturastramonium, D. ferox.

false columnaris disease

similar to columnaris disease but caused by infection with the bacteria Cytophaga johnsonae. Characterized by skin erosion especially at the fins and jaws.

false distemper

a disease of horses with some similarity to strangles. See pectoral abscess.

false garlic

alliumvineale.

false gid

see oestrusovis.

false hellebore

veratrumcalifornicum, V. viride.

false indigo

see baptisia leucantha.

false joint

a fracture in a long bone that does not heal; the ends callus over and there is mobility at the point.

false layer

a hen with all the appearances and the behavior of a laying hen but which does not lay any eggs. There is a defect in ovum entrapment and the eggs are discharged into the peritoneal cavity although egg peritonitis is not apparent.

false lupine

thermopsismontana, T. rhombifolia.

false negative

when the result of a test in a patient is negative when the disease or condition which is the subject of the search is present.

false positive

see false-positive.

false quarter

a condition of the horse's hoof in which a serious injury to the coronet causes an overgrowth of horn which overlaps the normal wall.

false scorpions

members of the order Pseudoscorpiones. Nonvenomous arachnids called also book scorpions.