| hinge region | <immunology, molecular biology> Flexible region of a polypeptide chain for example: as in immunoglobulins between Fab and Fc regions and in myosin the S2 portion of heavy meromyosin. (18 Nov 1997) |
|---|---|
| terminal hinge position | The mandibular hinge position from which further opening of the mandible would produce translatory rather than hinge movement. (05 Mar 2000) |
| bird face | bird face, abnormal shortness or recession of the mandible (27 Sep 1997) |
| masklike face | The expressionless or masklike facies characteristic of parkinsonism. Synonym: masklike face. (05 Mar 2000) |
| partial face-sparing lipodystrophy | A syndrome beginning at puberty that resembles total lipodystrophy but is inherited as an autosomal or X-linked dominant form. (05 Mar 2000) |
| regions of face | The topographical subdivisions of the face, including nasal, oral, mental, orbital, infraorbital, buccal, and zygomatic. Synonym: regiones faciales. (05 Mar 2000) |
| P face | Method of specimen preparation for the electron microscope in which rapidly frozen tissue is cracked so as to produce a fracture plane through the specimen. The surface of the fracture plane is then shadowed by heavy metal vapour, strengthened by a carbon film and the underlying specimen is digested away, leaving a replica that can be picked up on a grid and examined in the transmission electron microscope. The great advantage of the method is that the fracture plane tends to pass along the centre of lipid bilayers and it is therefore possible to get en face views of membranes that reveal the pattern of Integral membrane proteins. The E face is the outer lamella of the plasma membrane viewed as if from within the cell, the P face the inner lamella viewed from outside the cell. Fracture planes also often pass along lines of weakness such as the interface between cytoplasm and membrane, so that outer and inner membrane surfaces can be viewed. Further information about the structure can be revealed by freeze etching. Extremely rapid freezing followed by deep etching has allowed the structure of the cytoplasm to be studied without the artefacts that might be introduced by fixation. (18 Nov 1997) |
| moon face | The round, usually red face, with large jowls, seen in Cushing's disease or in exogenous hyperadrenocorticalism. Moon shaped face, moon facies. (05 Mar 2000) |
| whistling face syndrome | Congenital association of skeletal defects (ulnar deviation of hands with camptodactyly, talipes equinovarus, and frontal bone defects) and characteristic facies (protrusion of lips as in whistling, sunken eyes with hypertelorism, and small nose); autosomal dominant inheritance. Synonym: craniocarpotarsal dysplasia, Freeman-Sheldon syndrome, whistling face syndrome. (05 Mar 2000) |
| motor nerve of face | <anatomy, nerve> The facial nerve enervates the muscles of the face (facial expression). Lesion of the facial nerve cause a drooping to one side of the face, inability to wrinkle the forehead, inability to whistle, inability to close the eye and deviation of the mouth to the unaffected side. Synonym: cranial nerve VII. (27 Sep 1997) |
| cow face | The cowlike face of ocular hypertelorism; typical of craniofacial dysostosis. Synonym: cow face. (05 Mar 2000) |
| hippocratic face | Facies hippocratica, a pinched expression of the face, with sunken eyes, concavity of cheeks and temples, relaxed lips, and leaden complexion; observed in one close to death after severe and prolonged illness. Synonym: hippocratic face. (05 Mar 2000) |
| dish face | A facial malformation characterised by protuberant forehead, depressed nose and maxilla, and prominent chin. Synonym: dish face. (05 Mar 2000) |
| E face | In freeze fracture the plasma membrane cleaves between the acyl tails of membrane phospholipids, leaving a monolayer on each half of the specimen. The E face is the inner face of the outer lipid monolayer. From within the cell this is the view that you would have of the outer half of the plasma membrane if the inner layer could be removed. The complementary surface is the P face (the inner surface of the inner leaflet of the bilayer). E stands for ectoplasmic, P for protoplasmic: not terms that are in common usage! (18 Nov 1997) |
| transverse vein of face | <anatomy, vein> A tributary of the superficial temporal or retromandibular veins, anastomosing with the facial vein. Synonym: vena transversa faciei, transverse vein of face. (05 Mar 2000) |