| gradient encoding | In magnetic resonance imaging, the technique of inducing a gradient in the magnetic field in the Y-axis to induce phase differences with location. Synonym: gradient encoding. (05 Mar 2000) |
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| phase encoding | In magnetic resonance imaging, the technique of inducing a gradient in the magnetic field in the Y-axis to induce phase differences with location. Synonym: gradient encoding. (05 Mar 2000) |
| encoding | The first stage in the memory process, followed by storage and retrieval, involving processes associated with receiving or briefly registering stimuli through one or more of the senses and modifying that information; a decay process or loss of this information (a type of forgetting) occurs rapidly unless the next two stages, storage and retrieval, are activated. (05 Mar 2000) |
| frequency encoding | In magnetic resonance imaging, a method of varying the magnetic field strength with location to encode the location of each voxel uniquely in one direction. (05 Mar 2000) |
| bipolar | Doubly polar; having two poles; as, a bipolar cell or corpuscle. Origin: Pref. Bi- + polar. Cf. Dipolar. Source: Websters Dictionary (01 Mar 1998) |
| bipolar cautery | Electrocautery by high frequency electrical current passed through tissue from an active to a passive electrode; used for haemostasis. (05 Mar 2000) |
| bipolar cell | <cell biology, physiology> A class of retinal interneurons, named after their morphology, that receive input from the photoreceptors and send it to the ganglion cells. Bipolar cells are nonspiking, their response to light is evenly graded and shows lateral inhibition. (19 Jan 1998) |
| bipolar disease | A type of depressive disease, formerly called manic-depressive illness. Not nearly as prevalent as other forms of depressive disorders, bipolar disorder involves cycles of depression and elation or mania. Sometimes the mood switches are dramatic and rapid, but most often they are gradual. Mania often affects thinking, judgment, and social behaviour in ways that cause serious problems and embarrassment. For example, unwise business or financial decisions may be made when an individual is in a manic phase. Bipolar disorder is often a chronic recurring condition. (12 Dec 1998) |
| bipolar disorder | <psychiatry> Perviously referred to as manic depressive illness, characterised by the occurrence of mania (euphoria) alternating with bouts of depression. (19 Jan 1998) |
| bipolar filament | <cell biology> Filaments that have opposite polarity at the two ends, classic example is the thick filament of striated muscle. (18 Nov 1997) |
| bipolar illness | <psychiatry> Perviously referred to as manic depressive illness, characterised by the occurrence of mania (euphoria) alternating with bouts of depression. (19 Jan 1998) |
| bipolar lead | A record obtained with two electrodes placed on different regions of the body, each electrode contributing significantly to the record; e.g., a standard limb lead. (05 Mar 2000) |
| bipolar neuron | A neuron that has two processes arising from opposite poles of the cell body. (05 Mar 2000) |
| bipolar psychosis | A mental disorder characterised by one or more episodes of mania (manic depression) which is usually accompanied by one or more episodes of depression (major depressive episode). See: endogenous depression, manic-depressive. (05 Mar 2000) |
| bipolar taxis | An obsolete term for repositioning of a retroverted uterus by making traction on the cervix in the vagina, and pushing up the fundus by the finger in the rectum. (05 Mar 2000) |