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 mondofacto - Online Medical Dictionary
Category: Health and Medicine > Medical Dictionary
Date & country: 26/01/2008, UK
Words: 116197


lateral plate
A nonsegmented mass of mesoderm on the lateral periphery of the embryonic disk. ... (05 Mar 2000) ...

lateral plate mesoderm
The peripheral thinned-out portion of intraembryonic mesoderm which is continuous with the extraembryonic mesoderm beyond the margins of the embryonic disk; in it develops the intraembryonic celom. ... Synonym: lateral mesoderm. ... (05 Mar 2000) ...

lateral plate of pterygoid process
Synonym for lateral pterygoid plate ... The larger and more lateral of the two bony plates extending downward from the point of union of the body and greater wing of the sphenoid bone on either side; forms medial wall of intfratemporal fossa and gives origin to pterygoi muscles. ... Synonym: lamina lateralis processus pterygoidei, lateral plate of pt …

lateral pole
Synonym for tubal extremity of ovary ... The rounded lateral end of the ovary, usually directed toward the infundibulum of the uterine tube. ... Synonym: extremitas tubaria ovarii, lateral pole. ... (05 Mar 2000) ...

lateral popliteal nerve
Synonym for common peroneal nerve ... <anatomy, nerve> One of the terminal divisions of the sciatic nerve, diverging from the tibial nerve at the upper end of the popliteal fossa, then coursing with the biceps tendon along the lateral portion of the popliteal space to wind around the neck of the fibula where it divides into the superficial and …

lateral preoptic nucleus
A vaguely defined group of nerve cells in the lateral zone of the preoptic region. ... Synonym: nucleus preopticus lateralis. ... (05 Mar 2000) ...

lateral process of malleus
A short projection from the base of the manubrium of the malleus, attached firmly to the drum membrane. ... Synonym: processus lateralis mallei, processus brevis, short process of malleus, tuberculum mallei. ... (05 Mar 2000) ...

lateral process of talus
A projection on the lateral side of the talus below the malleolar articular surface. ... Synonym: processus lateralis tali. ... (05 Mar 2000) ...

lateral projection
Radiographic projection with the X-ray beam in a coronal plane. ... (05 Mar 2000) ...

lateral proprius bundle
Synonym for lateral ground bundle ... lateral proprius bundle ...

lateral pterygoid
<anatomy, muscle> Origin, inferior head from lateral lamina of pterygoid process; superior head from infratemporal crest and adjacent greater wing of the sphenoid; insertion, into pterygoid pit of mandible and articular disk; action, brings jaw forward, opens jaw; nerve supply, nerve to lateral pterygoid from mandibular division of trigeminal …

lateral pterygoid plate
The larger and more lateral of the two bony plates extending downward from the point of union of the body and greater wing of the sphenoid bone on either side; forms medial wall of intfratemporal fossa and gives origin to pterygoi muscles. ... Synonym: lamina lateralis processus pterygoidei, lateral plate of pterygoid process. ... (05 Mar 2000) ...

lateral puboprostatic ligament
Synonym for ligamentum puboprostaticum laterale ... See: puboprostatic ligament. ... Synonym: lateral puboprostatic ligament. ... (05 Mar 2000) ...

lateral pyramidal fasciculus
Synonym for lateral pyramidal tract ... Those fibres of the pyramidal tract that cross to the opposite side in the pyramidal decussation and descend in the dorsal half of the lateral funiculus of the spinal cord; they are distributed throughout the length of the spinal cord to interneurons of the zona intermedia of the spinal gray matter. ... See: py …

lateral pyramidal tract
Those fibres of the pyramidal tract that cross to the opposite side in the pyramidal decussation and descend in the dorsal half of the lateral funiculus of the spinal cord; they are distributed throughout the length of the spinal cord to interneurons of the zona intermedia of the spinal gray matter. ... See: pyramidal tract. ... Synonym: tractus cort …

lateral ramus radiograph
A radiographic view of the mandibular ramus and condyle. ... (05 Mar 2000) ...

lateral recess of fourth ventricle
The narrow recess of the ventricle that extends laterally over, and down along the side of, the inferior cerebellar peduncle and the overlying cochlear nuclei; at its tip it opens by way of Luschka's foramen into the interopeduncular cistern of the subarachnoid space. By way of this recess, part of the choroid plexus of the fourth ventricle protrud …

lateral rectus
<anatomy, muscle> Origin, lateral part of the common tendinous ring that bridges superior orbital fissure; insertion, lateral part of sclera of eye; action, abduction; nerve supply, abducens. ... Synonym: musculus rectus lateralis, abducens oculi, musculus rectus externus. ... (05 Mar 2000) ...

lateral rectus muscle of the head
Synonym for rectus capitis lateralis ... <anatomy, muscle> Origin, transverse process of atlas; insertion, jugular process of occipital bone; action, inclines head to one side; nerve supply, ventral primary ramus of first cervical spinal nerve. ... Synonym: musculus rectus capitis lateralis, lateral rectus muscle of the head. ... (05 Mar 2000)
lateral recumbent position
Synonym for Sims' position ... A position to facilitate a vaginal examination, the patient lying on the side with the under arm behind the back, the thighs flexed, the upper one more than the lower. ... Synonym: English position, lateral recumbent position, semiprone position. ... (05 Mar 2000) ...

lateral region
The area of the abdomen on each side of the umbilical region between transpyloric plane and intertubercular or interspinous plane. ... Synonym: regio lateralis. ... (05 Mar 2000) ...

lateral region of neck
Synonym for posterior triangle of neck ... The region of the neck bounded by the sternocleidomastoid muscle, the trapezius muscle, and the upper border of the clavicle, including the omoclavicular triangle. ... Synonym: lateral region of neck, regio cervicalis lateralis, trigonum cervicale posterius. ... (05 Mar 2000) ...

lateral reticular nucleus
Synonym for lateral nucleus of medulla oblongata ... A group of cells in the medulla oblongata, located between the inferior olive and the descending trigeminal nucleus, receiving fibres from the spinal cord and motor cortex and projecting to the cerebellum. ... Synonym: nucleus lateralis medullae oblongatae, lateral reticular nucleus. ... (05 Mar 200 …

lateral root of median nerve
<anatomy, nerve> The part of the median nerve arising from the lateral cord of the brachial plexus. ... Synonym: radix lateralis nervi mediani. ... (05 Mar 2000) ...

lateral root of optic tract
The larger division of the posterior end of the optic tract that terminates in the lateral geniculate body. ... Synonym: radix lateralis tractus optici. ... (05 Mar 2000) ...

lateral sacral artery
<anatomy, artery> Usually one of two arteries which arise from the internal iliac artery or its branches; they supply muscles and skin in the neighborhood and send branches into the sacral canal, supplying radicular and spinal arteries, and continuing on to the skin and subcutaneous tissues overlying the sacrum. ... Synonym: arteria sacralis l …

lateral sacral crests
Crests which are rough ridges lying lateral to the sacral foramina; they represent the fused transverse processes of sacral vertebrae. ... Synonym: cristae sacrales laterales. ... (05 Mar 2000) ...

lateral sacral veins
Several veins that receive the drainage of the sacral venous plexus and sacral intervertebral veins then accompany the corresponding artery and empty into the internal iliac vein on each side. ... Synonym: venae sacrales laterales. ... (05 Mar 2000) ...

lateral sacrococcygeal ligament
<anatomy> A ligament that extends from the lateral inferior margin of the sacrum to the transverse process of the first coccygeal vertebra. ... Synonym: ligamentum sacrococcygeum laterale, intercornual ligament. ... (05 Mar 2000) ...

lateral segment
A delimited part or section of an organ or other structure which lies farthest to the left or right side of the other similar parts or sections. 1) segmentum laterale (hepar); the lateral segment of the left lobe of the liver. 2) segmentum laterale (pulmo dexter); [S 4]; the lateral segment of the middle lobe of the right lung. ... Synonym: segmentu …

lateral semicircular canals
Synonym for bony semicircular canals ... The three bony tubes in the labyrinth of the ear within which the membranous semicircular ducts are located; they lie in planes at right angles to each other and are known as anterior semicircular canal, posterior semicircular canal, and lateral semicircular canal. ... Synonym: canales semicirculares ossei. …

lateral sinus
Synonym for transverse sinus ... A paired dural venous sinus that drains the confluence of sinuses, running along the occipital attachment of the tentorium cerebelli and terminating in the sigmoid sinus. ... Synonym: sinus transversus, lateral sinus. ... Transverse pericardial sinus, a passage in the pericardial sac between the origins of the great ve …

lateral skull radiograph
A true lateral projection radiograph of facial bones and calvarium, showing bone structures and air-containing passages. ... (05 Mar 2000) ...

lateral spinal sclerosis
Synonym for primary lateral sclerosis ... Considered by many to be a subgroup of motor neuron disease; a slowly progressive degenerative disorder of the motor neurons of the cerebral cortex, resulting in widespread weakness on an upper motor neuron basis; spasticity, hyperreflexia, and Babinski signs are present, but not fasciculation potentials, no …

lateral spinothalamic tract
The dorsal part of the spinothalamic tract, which conveys impulses associated with pain and temperature sensation. ... See: spinothalamic tract. ... Synonym: tractus spinothalamicus lateralis. ... (05 Mar 2000) ...

lateral splanchnic arteries
Artery's that arise in the embryo from the dorsal aorta to supply the mesonephros, testis or ovary, and adrenal gland. ... (05 Mar 2000) ...

lateral striate arteries
Numerous small branches from the sphenoidal part of the middle cerebral arteries supplying the lateral and anterior parts of the corpus striatum. ... Synonym: arteriae centrales anterolaterales, arteriae thalamostriatae anterolaterales, anterolateral central arteries, anterolateral striate arteries, anterolateral thalamostriate arteries, arteries of …

lateral superior genicular artery
Synonym for superior lateral genicular artery ... <anatomy, artery> Origin, popliteal; distribution, knee joint; anastomoses, lateral circumflex femoral, third perforating, anterior tibial recurrent, lateral inferior genicular, i.e., the articular vascular network of the knee. ... Synonym: arteria genus superior lateralis, lateral superior geni …

lateral supraclavicular nerve
<anatomy, nerve> One of several branches of the C-3-C-4 portion of the cervical plexus which descend to the skin over the acromion and deltoid region. ... Synonym: nervus supraclavicularis lateralis, posterior supraclavicular nerve. ... (05 Mar 2000) ...

lateral supracondylar crest
Synonym for lateral supracondylar ridge ... The distal sharp portion of the lateral margin of the humerus. ... Synonym: crista supracondylaris lateralis, lateral epicondylar crest, lateral epicondylar ridge, lateral supracondylar crest. ... (05 Mar 2000) ...

lateral supracondylar ridge
The distal sharp portion of the lateral margin of the humerus. ... Synonym: crista supracondylaris lateralis, lateral epicondylar crest, lateral epicondylar ridge, lateral supracondylar crest. ... (05 Mar 2000) ...

lateral sural cutaneous nerve
<anatomy, nerve> It arises from the common peroneal in the popliteal space and is distributed to the skin of the inferolateral surface of the calf. ... Synonym: nervus cutaneus surae lateralis, lateral cutaneous nerve of calf. ... (05 Mar 2000) ...

lateral surface
The surface of a part of the body that faces away from the midline. The NA recognises a lateral surface on the following structures: fibula; ovary; radius; testis; tibia; zygomatic bone. ... Synonym: facies lateralis. ... (05 Mar 2000) ...

lateral surface of arm
The lateral surface of the arm. ... Synonym: facies lateralis brachii. ... (05 Mar 2000) ...

lateral surface of fibula
The lateral surface of the fibula. ... Synonym: facies lateralis fibulae. ... (05 Mar 2000) ...

lateral surface of finger
The lateral surface of a finger. ... Synonym: facies lateralis digiti manus. ... (05 Mar 2000) ...

lateral surface of leg
The lateral surface of the part of the inferior limb between the knee and the ankle. ... Synonym: facies lateralis cruris. ... (05 Mar 2000) ...

lateral surface of lower limb
The lateral surface of the inferior limb. ... Synonym: facies lateralis membri inferioris. ... (05 Mar 2000) ...

lateral surface of ovary
The surface of the ovary facing the pelvic wall. ... Synonym: facies lateralis ovarii. ... (05 Mar 2000) ...

lateral surface of testis
The laterally directed surface of the testis. ... Synonym: facies lateralis testis. ... (05 Mar 2000) ...

lateral surface of tibia
The laterally directed surface of the tibia. ... Synonym: facies lateralis tibiae. ... (05 Mar 2000) ...

lateral surface of toe
The lateral surface of a toe. ... Synonym: facies lateralis digiti pedis. ... (05 Mar 2000) ...

lateral surface of zygomatic bone
The lateral surface of the zygomatic bone. ... Synonym: facies lateralis ossis zygomatici. ... (05 Mar 2000) ...

lateral talocalcaneal ligament
<anatomy> A ligament extending from the trochlea of the talus to the lateral surface of the calcaneus. ... Synonym: ligamentum talocalcaneare laterale. ... (05 Mar 2000) ...

lateral tarsal artery
<anatomy, artery> Origin, dorsalis pedis; distribution, tarsal joints and extensor digitorum brevis muscle; anastomoses, arcuate, peroneal, lateral plantar, anterior lateral malleolar. ... Synonym: arteria tarsea lateralis. ... (05 Mar 2000) ...

lateral temporomandibular ligament
<anatomy> The capsular ligament that passes obliquely down and backward across the lateral surface of the temporomandibular joint. ... Synonym: ligamentum laterale articulationis temporomandibularis, Ferrein's ligament, lateral ligament of temporomandibular joint, ligamentum temporomandibulare, temporomandibular ligament. ... (05 Mar 2000) ...

lateral thalamic peduncle
The massive group of fibres that emerges from the laterodorsal side of the thalamus to join the corona radiata; it reciprocally connects the lateral nucleus and the geniculate bodies of the thalamus with the corresponding regions of the cerebral cortex. ... Synonym: pedunculus thalami lateralis. ... (05 Mar 2000) ...

lateral thoracic artery
<anatomy, artery> Origin, axillary; distribution, muscles of chest and mammary gland. ... Synonym: arteria thoracica lateralis, external mammary artery, long thoracic artery. ... (05 Mar 2000) ...

lateral thoracic vein
<anatomy, vein> A tributary of the axillary vein that drains the lateral thoracic wall and communicates with the thoracoepigastric and intercostal veins. ... Synonym: vena thoracica lateralis. ... (05 Mar 2000) ...

lateral thyrohyoid ligament
<anatomy> Thickened elastic bundle connecting the superior horn of the thyroid cartilage to the tip of the greater horn of the hyoid cartilage; forms the posterior border of the thyrohyoid membrane. ... Synonym: ligamentum thyrohyoideum laterale, Berry's ligaments, ligamentum hyothyroideum laterale. ... (05 Mar 2000) ...

lateral tuberal nuclei
Synonym for tuberal nuclei ... Two or three small, encapsulated, round or ovoid clusters of cells in the lateral hypothalamic area along the surface of the tuber cinereum; their connections and functional significance are unknown. ... Synonym: nuclei tuberales, lateral tuberal nuclei. ... (05 Mar 2000) ...

lateral umbilical 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) ...

lateral umbilical ligament
Synonym for ligamentum umbilicale laterale ... An old name for ligamentum umbilicale mediale. ... Synonym: lateral umbilical ligament. ... (05 Mar 2000) ...

lateral vaginal wall smear
A cytologic smear containing material obtained by scraping the lateral wall of the vagina near the junction of its upper and middle third; used for cytohormonal evaluation. ... (05 Mar 2000) ...

lateral vastus muscle
Synonym for vastus lateralis ... <anatomy, muscle> Origin, lateral lip of linea aspera as far as great trochanter; insertion, tibial tuberosity by way of common tendon of quadriceps femoris and patellar ligament; action, extends leg; nerve supply, femoral. ... Synonym: musculus vastus lateralis, lateral great muscle, lateral vastus muscle, musc …

lateral vein of lateral ventricle
Synonym for vena atrii lateralis ... A vein draining deep portions of the temporal and parietal lobes; it runs in the lateral wall of the lateral ventricle to terminate in the superior thalamostriate vein. ... Synonym: vena ventriculi lateralis lateralis, lateral atrial vein, lateral vein of lateral ventricle. ... (05 Mar 2000) ...

lateral venous lacunae
Lateral expansions of the superior sagittal sinus of the dura mater, often increasing in width with advancing age until, in the very old, they may extend two centimeters lateral to the midline; the endothelium-lined lumen of the lacunae are usually reduced to a spongelike labyrinth by numerous arachnoid granulations and dural trabeculae. ... Synonym …

lateral ventral hernia
Synonym for spigelian hernia ... Abdominal hernia through the semilunar line. ... Synonym: lateral ventral hernia. ... (05 Mar 2000) ...

lateral ventricle
A cavity shaped somewhat like a horseshoe in conformity with the general shape of the hemisphere; each lateral ventricle communicates with the third ventricle through the interventricular foramen of Monro, and expands from there forward into the frontal lobe as the anterior horn as well as caudally over the thalamus as the central part or cella med …

lateral vertigo
Dizziness caused by watching the telegraph poles and fences from the window of a fast-moving vehicle. ... (05 Mar 2000) ...

lateral vestibular nucleus
Nucleus vestibularis lateralis. ... See: vestibular nucleus. ... (05 Mar 2000) ...

lateral wall of middle ear
Synonym for lateral wall of tympanic cavity ... The wall formed mainly by the tympanic membrane. ... Synonym: paries membranaceus cavi tympani, lateral wall of middle ear, membranous wall of middle ear. ... (05 Mar 2000) ...

lateral wall of orbit
A triangular wall of the orbit formed by the zygomatic bone, the greater wing of the sphenoid bone, and a small part of the frontal bone; posteriorly it is bounded by the superior and inferior orbital fissures. ... Synonym: paries lateralis orbitae. ... (05 Mar 2000) ...

lateral wall of tympanic cavity
The wall formed mainly by the tympanic membrane. ... Synonym: paries membranaceus cavi tympani, lateral wall of middle ear, membranous wall of middle ear. ... (05 Mar 2000) ...

lateral X-ray
An X-ray picture taken from the side. ... (12 Dec 1998) ...

lateralis
Synonym: lateral, lateral, lateral. ... Origin: L. ... (05 Mar 2000) ...

laterality
Behavioural manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot. ... (12 Dec 1998) ...

lateralization
The process whereby certain embryological asymmetries of structure (such as the right-side location of the liver and the structure of the great vessels) and function (handedness) are ordained phylogenetically, coded genetically, and realised ontogenetically. ... (05 Mar 2000) ...

lateriflexion
Synonym for lateroflexion ... Lateroflection ... A bending or curvature to one side. ... Synonym: lateriflexion, lateriflection. ... Origin: Latero-+ L. Flecto, pp. Flexus, to bend ... (05 Mar 2000) ...

lateritious
Like bricks; of the colour of red bricks. ... <medicine> Lateritious sediment, a sediment in urine resembling brick dust, observed after the crises of fevers, and at the termination of gouty paroxysms. It usually consists of uric acid or urates with some colouring matter. ... Origin: L.lateritius, fr. Later a brick. ... Source: Websters Dictiona …

latero-
Lateral, to one side. ... Origin: L. Lateralis, lateral, fr. Latus, side ... (05 Mar 2000) ...

lateroabdominal
Relating to the sides of the abdomen, to the loins or flanks. ... (05 Mar 2000) ...

laterodeviation
A bending or a displacement to one side. ... Origin: Latero-+ L. Devio, to turn aside, fr. Via, a way ... (05 Mar 2000) ...

lateroduction
A drawing to one side; denoting a movement of a limb or turning of the eyeball away form the midline. ... Synonym: exduction. ... Origin: Latero-+ L. Duco, pp. Ductus, to lead ... (05 Mar 2000) ...

lateroflexion
Lateroflection ... A bending or curvature to one side. ... Synonym: lateriflexion, lateriflection. ... Origin: Latero-+ L. Flecto, pp. Flexus, to bend ... (05 Mar 2000) ...

lateroposition
A shift to one side. ... (05 Mar 2000) ...

lateropulsion
An involuntary sidewise movement occurring in certain nervous affections. ... Origin: Latero-+ L. Pello, pp. Pulsus, to push, drive ... (05 Mar 2000) ...

laterotorsion
A twisting to one side; denoting rotation of the eyeball around its anteroposterior axis, so that the top part of the cornea turns away from the sagittal plane. ... Origin: Latero-+ L. Torsio, a twisting ... (05 Mar 2000) ...

laterotrusion
The outward thrust given by the muscles of mastication to the rotating mandibular condyle during movement of the mandible. ... Origin: Latero-+ L. Trudo, pp. Trusus, to thrust ... (05 Mar 2000) ...

lateroversion
Version to one side or the other, denoting especially a malposition of the uterus. ... Origin: Latero-+ L. Verto, pp. Versus, to turn ... (05 Mar 2000) ...

latex
A viscous fluid exuded from the cut surfaces of the leaves and stems of certain plants, such as the dandelion or the rubber tree. ... A rubber made from such plant sap. ... (09 Oct 1997) ...

latex agglutination
Also known as latex particle agglutination, for detection of antibodies is identical to haemagglutination in principle, but the substitution of smaller, antigen-coated latex particles for erythrocytes results in improved sensitivity and reagent longevity. Alternatively, antibodies can be absorbed to the latex particles (under appropriate ionic and …

latex agglutination test
A passive agglutination test in which antigen is adsorbed onto latex particles which then clump in the presence of antibody specific for the adsorbed antigen. ... Synonym: latex fixation test. ... (05 Mar 2000) ...

latex fixation test
Synonym for latex agglutination test ... A passive agglutination test in which antigen is adsorbed onto latex particles which then clump in the presence of antibody specific for the adsorbed antigen. ... Synonym: latex fixation test. ... (05 Mar 2000) ...

latex fixation tests
Passive agglutination tests in which antigen is adsorbed onto latex particles which then clump in the presence of antibody specific for the adsorbed antigen. ... (12 Dec 1998) ...

lath
Origin: OE. Laththe, latthe, latte, AS. Laetta; akin to D. Lat, G. Latte, OHG. Latta; cf. W. Llath a rod, staff, yard. Cf. Lattice, Latten. ... A thin, narrow strip of wood, nailed to the rafters, studs, or floor beams of a building, for the purpose of supporting the tiles, plastering, etc. A corrugated metallic strip or plate is sometimes used. Lat …

lathe
Formerly, a part or division of a county among the Anglo-Saxons. at present it consists of four or five hundreds, and is confined to the county of Kent. ... Alternative forms: lath. ... Origin: AS.laeth. Of. Uncertain origin. ... 1. A granary; a barn. ... 2. <machinery> A machine for turning, that is, for shaping articles of wood, metal, or other …

lathosterol delta-5-dehydrogenase
<enzyme> Forms 7-dehydrocholesterol (cholesta-5,7-dien-3-beta-ol) ... Registry number: EC 1.3.3.2 ... Synonym: 5 alpha-cholest-7-en-3 beta-ol delta-5-dehydrogenase, lathosterol oxidase, lathosterol 5-desaturase ... (26 Jun 1999) ...

lathyrism
Disorder of collagen cross linking as a result of copper sequestration by nitriles. (Lysyl oxidase is a copper containing metalloenzyme). In animals, caused by eating toxic plants of genus Lathyris. ... (18 Nov 1997) ...

lathyrogen
An agent or drug, occurring naturally or used experimentally, that induces lathyrism. ... (05 Mar 2000) ...