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

posterior mediastinal mass
<radiology> Mnemonic: HALOVEEN, haematoma, abscess, lymph nodexs, osteophyte, vertebral (metastasis, plasmacytoma), extramedullary haematopoesis, oesophagus, neurogenic ... (12 Dec 1998) ...

posterior mediastinum
Lies between the pericardium and the vertebral column, below the level of the T4/5 intervertebral disc. It contains the descending aorta, thoracic duct, oesophagus, azygos veins, and vagus nerves. ... Synonym: mediastinum posterius, postmediastinum. ... (05 Mar 2000) ...

posterior medullary velum
Synonym for inferior medullary velum ... A thin sheet of white matter, hidden by the cerebellar tonsil, attached along the peduncle of the flocculus and, at and near the midline, to the nodulus of the vermis; it is continuous caudally with the epithelial lamina and choroid plexus of the fourth ventricle. ... Synonym: velum medullare inferius, posteri …

posterior meningeal artery
<anatomy, artery> Origin, ascending pharyngeal; distribution, dura mater of posterior cranial fossa; anastomoses, branches of middle meningeal and vertebral. ... Synonym: arteria meningea posterior. ... (05 Mar 2000) ...

posterior meniscofemoral ligament
<anatomy> The band that passes posterior to the posterior cruciate ligament extending between the medial condyle of the femur and the posterior crus of the lateral meniscus. ... Synonym: ligamentum meniscofemorale posterius, ligamentum cruciatum tertium genus, ligamentum menisci lateralis, Wrisberg's ligament. ... (05 Mar 2000) ...

posterior myocardial infarction
Infarction involving the posterior wall of the heart; also formerly used erroneously of infarction's involving the inferior or diaphragmatic surface of the heart. ... (05 Mar 2000) ...

posterior naris
Synonym for choana ... The opening into the nasopharynx of the nasal cavity on either side. ... Synonym: isthmus pharyngonasalis, posterior naris, postnaris. ... Origin: Mod. L. Fr. G. Choane, a funnel ... (05 Mar 2000) ...

posterior nasal spine
The sharp posterior extremity of the nasal crest of the hard palate. ... Synonym: spina nasalis posterior, posterior palatine spine. ... (05 Mar 2000) ...

posterior neck region
Synonym for posterior region of neck ... The back of neck, including the suboccipital region. ... Synonym: regio nuchalis, nuchal region, posterior neck region, regio cervicalis posterior. ... (05 Mar 2000) ...

posterior nephrectomy
<procedure> Retroperitoneal removal of a kidney through an incision in the posterior lumbar muscles, usually with the patient in a prone position. ... (05 Mar 2000) ...

posterior neuropore
Synonym for caudal neuropore ... The temporary opening at the extreme caudal end of the neural tube in early embryos; closes at the 25th somite stage. ... Synonym: posterior neuropore. ... (05 Mar 2000) ...

posterior notch of cerebellum
Synonym for posterior cerebellar notch ... A narrow notch between the cerebellar hemispheres posteriorly, occupied by the falx cerebelli. ... Synonym: incisura cerebelli posterior, marsupial notch, posterior notch of cerebellum. ... (05 Mar 2000) ...

posterior occipitoaxial ligament
Synonym for tectorial membrane ... A gelatinous membrane, attached to the bony spiral lamina, which overlies the hair cells within the cochlea of the inner ear. ... (12 Dec 1998) ...

posterior occlusion
The most effective contact of the molar and bicuspid teeth of both jaws which allows for all the natural movements of the jaws essential to normal mastication and closure. ... Synonym: posteroclusion. ... (05 Mar 2000) ...

posterior palatal seal
The seal at the posterior border of a denture. ... See: posterior palatal seal area. ... Synonym: palatal seal, post dam, postdam, postpalatal seal. ... (05 Mar 2000) ...

posterior palatal seal area
The soft tissues along the junction of the hard and soft palates on which pressure within the physiologic limits of the tissues can be applied by a denture to aid in the retention of the denture. ... Synonym: post dam area, postpalatal seal area. ... (05 Mar 2000) ...

posterior palatine arch
Synonym for palatopharyngeal arch ... One of a pair of ridges or folds of mucous membrane which passes downward from the posterior margin of the soft palate to the lateral wall of the pharynx. It encloses the palatopharyngeus muscle and forms the posterior margin of the tonsillar fossa. It also demarcates the isthmus of fauces from oropharynx. ... Sy …

posterior palatine foramina
Synonym for lesser palatine foramina ... Openings on the hard palate of palatine canals passing vertically through the tuberosity of the palatine bone and transmitting the smaller palatine nerves and vessels. ... Synonym: foramina palatina minora, posterior palatine foramina. ... (05 Mar 2000) ...

posterior palatine spine
Synonym for posterior nasal spine ... The sharp posterior extremity of the nasal crest of the hard palate. ... Synonym: spina nasalis posterior, posterior palatine spine. ... (05 Mar 2000) ...

posterior parietal artery
<anatomy, artery> The branch distributed to the posterior part of the parietal lobe. ... Synonym: arteria parietales posterior. ... (05 Mar 2000) ...

posterior parolfactory sulcus
A shallow groove on the medial surface of the hemisphere demarcating the subcallosal gyrus or precommissural septum from the parolfactory area. ... Synonym: sulcus parolfactorius posterior. ... (05 Mar 2000) ...

posterior parotid veins
Synonym for parotid veins ... Branches draining part of the parotid gland and emptying into the retromandibular vein. ... Synonym: venae parotidea, posterior parotid veins. ... (05 Mar 2000) ...

posterior part
The posterior portion of the anterior commissure of the brain. ... (05 Mar 2000) ...

posterior pelvic exenteration
Removal of the vagina, uterus, adnexa, rectum, anus, and adjacent lymph nodes; a colostomy is necessary. ... (05 Mar 2000) ...

posterior perforated substance
The bottom of the interpeduncular fossa at the base of the midbrain, extending from the anterior border of the pons forward to the mamillary bodies, and containing numerous openings for the passage of perforating branches of the posterior cerebral arteries. ... Synonym: substantia perforata posterior, locus perforatus posticus, Malacarne's space. …

posterior pericallosal vein
Synonym for vena corporis callosi dorsalis ... It originates on the superior surface of the corpus callosum and runs posteriorly to terminate in the great cerebral vein. ... Synonym: dorsal callosal vein, dorsal vein of corpus callosum, posterior marginal vein, posterior pericallosal vein. ... (05 Mar 2000) ...

posterior peroneal arteries
Synonym for lateral malleolar arteries ... Lateral malleolar branches of peroneal artery. ... Synonym: rami malleolares laterales, arteriae malleolares posteriores laterales, posterior peroneal arteries. ... (05 Mar 2000) ...

posterior pillar of fauces
Synonym for palatopharyngeal arch ... One of a pair of ridges or folds of mucous membrane which passes downward from the posterior margin of the soft palate to the lateral wall of the pharynx. It encloses the palatopharyngeus muscle and forms the posterior margin of the tonsillar fossa. It also demarcates the isthmus of fauces from oropharynx. ... Sy …

posterior pillar of fornix
Synonym for crus fornicis ... That part of the fornix that rises in a forward curve behind the thalamus to continue forward as the body for fornix ventral to the corpus callosum. ... Synonym: crus of fornix, posterior pillar of fornix. ... (05 Mar 2000) ...

posterior pituitary
The cleaned, dried, and powdered posterior lobe obtained from the pituitary body of domestic animals used for food by humans; an oxytocic, vasoconstrictor, antidiuretic, and a stimulant of intestinal motility. ... Synonym: desiccated pituitary, hypophysis sicca. ... (05 Mar 2000) ...

posterior pole of eyeball
The centre of the posterior curvature of the eye. ... Synonym: polus posterior bulbi oculi. ... (05 Mar 2000) ...

posterior pole of lens
The central point on the posterior surface of the lens. ... Synonym: polus posterior lentis. ... (05 Mar 2000) ...

posterior primary division
Synonym for dorsal primary ramus of spinal nerve ... <anatomy, nerve> The smaller, posteriorly-directed major terminal branch (with the ventral primary ramus) of all 31 pairs of mixed spinal nerves, formed at the intervertebral foramen and turning abruptly posteriorly to divide into lateral and medial branches, both of which will supply the de …

posterior probability
The best rational assessment of the probability of an outcome on the basis of established knowledge modified and brought up to date. ... Compare: Bayes theorem. ... (05 Mar 2000) ...

posterior process of talus
A projection of the talus bearing medial and lateral tubercles; it is posterior and inferior to the trochlea. ... Synonym: processus posterior tali, Stieda's process. ... (05 Mar 2000) ...

posterior pyramid of the medulla
Synonym for fasciculus gracilis ... gracile fasciculus ...

posterior quadrigeminal body
Synonym for inferior colliculus ... The ovoid, paired, inferior eminence of the laminae of mesencephalic tectum; it receives the lateral lemniscus and projects by way of the brachium of inferior colliculus to the medial geniculate body of the thalamus, and is thus an essential way-station in the central auditory pathway. ... Synonym: colliculus infer …

posterior recess
A deepening of the interpeduncular fossa toward the pons. ... Synonym: recessus posterior. ... (05 Mar 2000) ...

posterior region of arm
The back of arm. ... Synonym: facies brachialis posterior, regio brachialis posterior, posterior brachial region, posterior surface of arm. ... (05 Mar 2000) ...

posterior region of elbow
The back of the elbow. ... Synonym: facies cubitalis posterior, regio cubitalis posterior, posterior cubital region, posterior surface of elbow. ... (05 Mar 2000) ...

posterior region of forearm
The area between the radial and ulnar borders of the forearm posteriorly. ... Synonym: regio antebrachialis posterior, facies antebrachialis posterior, posterior antebrachial region, posterior surface of forearm. ... (05 Mar 2000) ...

posterior region of leg
The back of the leg. ... Synonym: regio cruralis posterior, posterior crural region, posterior surface of leg. ... (05 Mar 2000) ...

posterior region of neck
The back of neck, including the suboccipital region. ... Synonym: regio nuchalis, nuchal region, posterior neck region, regio cervicalis posterior. ... (05 Mar 2000) ...

posterior region of thigh
The back of the thigh. ... Synonym: facies femoralis posterior, posterior surface of thigh, regio femoralis posterior. ... (05 Mar 2000) ...

posterior rhinoscopy
Inspection of the nasopharynx and posterior portion of the nasal cavity by means of the rhinoscope, or with a nasopharyngoscope. ... See: nasopharyngoscopy. ... (05 Mar 2000) ...

posterior rhizotomy
<procedure> Section of posterior spinal root. ... Synonym: Dana's operation. ... (05 Mar 2000) ...

posterior root
Synonym for dorsal root ... The sensory root of a spinal nerve, having a dorsal root ganglion containing the nerve cell bodies of the fibres conveyed by the root in its distal end. ... Synonym: radix posterior, radix sensoria, posterior root, radix dorsalis. ... (05 Mar 2000) ...

posterior sacroiliac ligaments
The heavy fibrous bands that pass from the ilium to the sacrum posterior to the sacroiliac joint. ... Synonym: ligamenta sacroiliaca posteriora, dorsal sacroiliac ligaments, ligamentum sacroiliacum posterius. ... (05 Mar 2000) ...

posterior sacrosciatic ligament
Synonym for sacrotuberous ligament ... <anatomy> The ligament that passes from the ischial tuberosity to the ilium, sacrum, and coccyx, transforming the scialic notch to a large scialic foramen, which is then further subdivided by the sacrospinous ligament. ... Synonym: ligamentum sacrotuberale, ligamentum sacrotuberosum, posterior sacrosciatic …

posterior sagittal diameter
Distance from the sacrococcygeal junction to the middle of an imaginary line running between the left and right ischial tuberosities. ... (05 Mar 2000) ...

posterior scalene muscle
Synonym for scalenus posterior ... <anatomy, muscle> Origin, posterior tubercles of transverse processes of fourth to sixth cervical vertebrae; insertion, lateral surface of second rib; action, elevates second rib; nerve supply, cervical and brachial plexuses. ... Synonym: musculus scalenus posterior, musculus scalenus posticus, posterior scale …

posterior scapular nerve
Synonym for dorsal scapular nerve ... <anatomy, nerve> Arises from ventral primary rami of the fifth to seventh cervical nerves and passes downward to supply the levator scapulae and the rhomboideus major and minor muscles. ... Synonym: nervus dorsalis scapulae, dorsal nerve of scapula, nerve to rhomboid, posterior scapular nerve. ... (05 Mar 20 …

posterior scleritis
Inflammation, often monocular, of the sclera adjacent to the optic nerve, with frequent extension to the retina and choroid. ... (05 Mar 2000) ...

posterior sclerosis
Synonym for tabetic neurosyphilis ... See Tabes dorsalis. ... (12 Dec 1998) ...

posterior sclerotomy
<procedure> Incision through the sclera into the vitreous humor. ... (05 Mar 2000) ...

posterior scrotal nerves
Several terminal branches of the superficial perineal nerve supplying the skin of the posterior portion of the scrotum, corresponding to the posterior labial nerves in the female. ... Synonym: nervi scrotales posteriores. ... (05 Mar 2000) ...

posterior scrotal veins
Veins from the posteriro aspect of the scrotum to the internal pudendal veins. ... Synonym: venae scrotales posteriores. ... (05 Mar 2000) ...

posterior segment
A delimited part or section of an organ or other structure which lies in back of or dorsal to the other similar parts or sections; 1) segmentum posterius (hepar); the posterior segment of the right lobe of the liver; 2) segmentum posterius (pulmo dexter); [S 2]; the posterior segment of the superior lobe of the right lung; 3) segmentum posterius (r …

posterior segment of eyeball
The large space between the lens and the retina; it is filled with the vitreous body. ... Synonym: camera vitrea bulbi, vitreous camera, vitreous chamber of eye. ... (05 Mar 2000) ...

posterior 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. …

posterior septal artery of nose
A branch of the sphenopalatine artery that supplies the nasal septum and accompanies the nasopalatine nerve. ... Synonym: arteria nasalis posterior septi. ... (05 Mar 2000) ...

posterior spinal artery
<anatomy, artery> Origin, vertebral; distribution, medulla, spinal cord, and pia mater; anastomoses, spinal branches of intercostal arteries. ... Synonym: arteria spinalis posterior. ... (05 Mar 2000) ...

posterior spinal sclerosis
Synonym for tabetic neurosyphilis ... See Tabes dorsalis. ... (12 Dec 1998) ...

posterior spinocerebellar tract
A compact bundle of heavily myelinated, thick fibres at the periphery of the dorsal half of the lateral funiculus of the spinal cord, originating in the ipsilateral thoracic nucleus (column of Clarke) and ascending by way of the inferior cerebellar peduncle. Terminals end as mossy fibres in the granular layer of the cortex of the cerebellar vermis. …

posterior staphyloma
A bulging near the posterior pole of the eyeball due to degenerative changes in severe myopia. ... Synonym: Scarpa's staphyloma, sclerochoroiditis posterior. ... (05 Mar 2000) ...

posterior sternoclavicular ligament
<anatomy> A fibrous band that reinforces the sternoclavicular joint posteriorly. ... Synonym: ligamentum sternoclaviculare posterius. ... (05 Mar 2000) ...

posterior subcapsular cataract
A cataract involving the cortex at the posterior pole of the lens. ... (05 Mar 2000) ...

posterior superior alveolar artery
<anatomy, artery> Origin, 3rd part of maxillary artery within pterygopalatine fossa; distribution, molar and premolar teeth, gingiva and mucous membrane of maxillary sinus. ... Synonym: arteria alveolaris superior posterior, posterior alveolar artery, posterior dental artery. ... (05 Mar 2000) ...

posterior superior iliac spine
The posterior extremity of the iliac crest, the uppermost point of attachment of the sacrotuberous and posterior sacroiliac ligaments; a readily apparent dimple occurs in the skin overlying the posterior superior iliac spine which is clinically useful as an indication of the level of the S-2 vertebra, the level of the inferior limit of the subarach …

posterior supraclavicular nerve
Synonym for 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) ...

posterior surface
The surface of a part of the body that faces toward the posterior part of the body. The NA recognises a posterior surface without qualification on the following structures: arm; arytenoid cartilage; cornea; eyelid; fibula; humerus; iris; kidney; leg; pancreas; prostate; radius; suprarenal gland; ulna. ... Synonym: facies posterior. ... (05 Mar 2000)< …

posterior surface of arm
Synonym for posterior region of arm ... The back of arm. ... Synonym: facies brachialis posterior, regio brachialis posterior, posterior brachial region, posterior surface of arm. ... (05 Mar 2000) ...

posterior surface of cornea
The posterior surface of the cornea. ... Synonym: facies posterior corneae. ... (05 Mar 2000) ...

posterior surface of elbow
Synonym for posterior region of elbow ... The back of the elbow. ... Synonym: facies cubitalis posterior, regio cubitalis posterior, posterior cubital region, posterior surface of elbow. ... (05 Mar 2000) ...

posterior surface of eyelids
The internal surface of the eyelids, covered with conjunctiva. ... Synonym: facies posterior palpebrarum. ... (05 Mar 2000) ...

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

posterior surface of forearm
Synonym for posterior region of forearm ... The area between the radial and ulnar borders of the forearm posteriorly. ... Synonym: regio antebrachialis posterior, facies antebrachialis posterior, posterior antebrachial region, posterior surface of forearm. ... (05 Mar 2000) ...

posterior surface of iris
The posterior surface of the iris. ... Synonym: facies posterior iridis. ... (05 Mar 2000) ...

posterior surface of kidney
The posterior surface of the kidney. ... Synonym: facies posterior renis. ... (05 Mar 2000) ...

posterior surface of leg
Synonym for posterior region of leg ... The back of the leg. ... Synonym: regio cruralis posterior, posterior crural region, posterior surface of leg. ... (05 Mar 2000) ...

posterior surface of lens
The posterior surface of the lens of the eye. ... Synonym: facies posterior lentis. ... (05 Mar 2000) ...

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

posterior surface of pancreas
The posterior surface of the pancreas. ... Synonym: facies posterior pancreatis. ... (05 Mar 2000) ...

posterior surface of prostate
The posterior surface of the prostate. ... Synonym: facies posterior prostatae. ... (05 Mar 2000) ...

posterior surface of radius
The posterior surface of the radius. ... Synonym: facies posterior radii. ... (05 Mar 2000) ...

posterior surface of thigh
Synonym for posterior region of thigh ... The back of the thigh. ... Synonym: facies femoralis posterior, posterior surface of thigh, regio femoralis posterior. ... (05 Mar 2000) ...

posterior surface of tibia
The posterior surface of the tibia. ... Synonym: facies posterior tibiae. ... (05 Mar 2000) ...

posterior surface of ulna
The posterior surface of the ulna. ... Synonym: facies posterior ulnae. ... (05 Mar 2000) ...

posterior symblepharon
Adhesion between the eyeball and eyelid involving the fornix. ... (05 Mar 2000) ...

posterior synechia
Adhesion of the iris to the capsule of the lens. ... (05 Mar 2000) ...

posterior talofibular ligament
<anatomy> The nearly horizontal fibrous band that extends from the posterior border of the talus to the malleolar fossa. ... Synonym: ligamentum talofibulare posterius. ... (05 Mar 2000) ...

posterior talotibial ligament
Synonym for posterior tibiotalar ligament ... <anatomy> The part of the medial or deltoid ligament that extends from the medial malleolus to the posterior process of the talus. ... Synonym: pars tibiotalaris posterior ligamenti medialis, ligamentum talotibiale posterius, posterior talotibial ligament, posterior tibiotalar part of deltoid ligame …

posterior teeth
<dentistry> Your bicuspids and molars. These are the teeth in the back of your mouth. ... (08 Jan 1998) ...

posterior temporal artery
<anatomy, artery> A branch of the insular part of the middle cerebral artery distributed to the cortex of the posterior part of the temporal lobe. ... Synonym: arteria temporalis posterior. ... (05 Mar 2000) ...

posterior thalamic radiations
Radiations formed by fibres interconnecting through the retrolenticular part of the posterior limb of the internal capsule, the pulvinar complex and lateral geniculate nucleus and the posterior parietal and occipital lobes of the cerebral cortex. ... (05 Mar 2000) ...

posterior thoracic nerve
Synonym for long thoracic nerve ... <anatomy, nerve> Arises from the fifth, sixth, and seventh cervical nerves (roots of brachial plexus), descends the neck behind the brachial plexus, and is distributed to the serratus anterior muscle; it is somewhat unusual in that it courses on the superficial aspect of the muscle is supplies; its paralysis …

posterior tibial artery
<anatomy, artery> The larger and more directly continuous of the two terminal branches of the popliteal; branches, peroneal, nutrient of fibula, lateral and medial posterior malleolar, nutrient of tibia, medial and lateral plantar. ... Synonym: arteria tibialis posterior. ... (05 Mar 2000) ...

posterior tibial lymph node
A small inconstant lymph node located along the course of the posterior tibial artery. ... Synonym: nodus tibialis posterior, posterior tibial node. ... (05 Mar 2000) ...

posterior tibial muscle
Synonym for tibialis posterior ... <anatomy, muscle> Origin, soleal line and posterior surface of tibia, the head and shaft of the fibula between the medial crest and interosseous border, and the posterior surface of interosseous membrane; insertion, navicular, three cuneiform, cuboid, and second, third, and fourth metatarsal bones; action, pl …

posterior tibial node
Synonym for posterior tibial lymph node ... A small inconstant lymph node located along the course of the posterior tibial artery. ... Synonym: nodus tibialis posterior, posterior tibial node. ... (05 Mar 2000) ...