| deep gray layer of superior colliculus | A layer of myelinated fibres, the deepest layer of the colliculus superior, delimiting the latter from the central gray substance surrounding the cerebral aqueduct. Synonym: stratum album profundum. (05 Mar 2000) |
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| digital gray scale | 1. Extent from side to side, or distance sidewise from a given point or line; breadth; width. "Provided the length do not exceed the latitude above one third part." (Sir H. Wotton) 2. Room; space; freedom from confinement or restraint; hence, looseness; laxity; independence. "In human actions there are no degrees and precise natural limits described, but a latitude is indulged." (Jer. Taylor) 3. Extent or breadth of signification, application, etc.; extent of deviation from a standard, as truth, style, etc. "No discreet man will believe Augustine's miracles, in the latitude of monkish relations." (Fuller) 4. Extent; size; amplitude; scope. "I pretend not to treat of them in their full latitude." (Locke) 5. <geography> Distance north or south of the equator, measured on a meridian. 6. <astronomy> The angular distance of a heavenly body from the ecliptic. Ascending latitude, Circle of latitude, Geographical latitude, etc. See Ascending. Circle, etc. High latitude, that part of the earth's surface near either pole, especially. That part within either the arctic or the antarctic circle. Low latitude, that part of the earth's surface which is near the equator. Origin: F. Latitude, L. Latitudo, fr. Latus broad, wide, for older stlatus; perh. Akin to E. Strew. Source: Websters Dictionary (01 Mar 1998) |
| ala central lobule | The lateral winglike projection of the central lobule of the cerebellum. Synonym: ala lobuli centralis, ala cerebelli. (05 Mar 2000) |
| anterior central convolution | Bounded posteriorly by the central sulcus and anteriorly by the precentral sulcus. Synonym: gyrus precentralis, anterior central convolution, anterior central gyrus, ascending frontal convolution, ascending frontal gyrus. (05 Mar 2000) |
| anterior central gyrus | Bounded posteriorly by the central sulcus and anteriorly by the precentral sulcus. Synonym: gyrus precentralis, anterior central convolution, anterior central gyrus, ascending frontal convolution, ascending frontal gyrus. (05 Mar 2000) |
| anterolateral central 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 cerebral haemorrhage, lenticulostriate arteries. (05 Mar 2000) |
| anteromedial central arteries | Several small branches of the precommunical part of the anterior cerebral artery; they are distributed to the anteromedial part of the corpus striatum part of the thalamus. Synonym: arteriae centrales anteromediales, arteriae thalamostriatae anteromediales, anteromedial thalamostriate arteries. (05 Mar 2000) |
| anteromedial central branches | Branches of the anterior communicating artery which supply part of the hypothalamus. Synonym: rami centrales anteromediales. (05 Mar 2000) |
| artery of central sulcus | <anatomy, artery> A branch of the terminal part of the middle cerebral artery distributed to the cortex on either side of the central sulcus. Synonym: arteria sulci centralis, artery of central sulcus, central artery, Rolandic artery. (05 Mar 2000) |
| asia, central | The geographical area of asia comprising kazakhstan, kyrgyzstan, tajikistan, turkmenistan, and uzbekistan. The desert region of kara kum (qara qum) is largely in turkmenistan and the desert region of kyzyl kum (kizil kum or qizil qum), is in uzbekistan and kazakhstan. (12 Dec 1998) |
| auditory diseases, central | Diseases of the auditory pathways from the bulbar cochlear nuclei to the auditory cortex in the temporal lobe. Structures involved include the medial and lateral lemnisci, inferior colliculus, and the medial geniculate nucleus. (12 Dec 1998) |
| recurrent central retinitis | An obsolete term for central serous retinopathy. (05 Mar 2000) |
| catheterization, central venous | Placement of an intravenous catheter in the subclavian, jugular, or other central vein for central venous pressure determination, chemotherapy, haemodialysis, or hyperalimentation. (12 Dec 1998) |
| measures of central tendency | General term for several characteristics of the distribution of a set of measurements or values around a value or values at or near the middle of the set; the principal measures of central tendency are mean, median, and mode. (05 Mar 2000) |
| medial central nucleus of thalamus | A small cell group in the interthalamic adhesion of the thalamus, occupying the midline region of the internal medullary lamina, between the left and the right paracentral nucleus. Synonym: nucleus medialis centralis thalami. (05 Mar 2000) |