| internal nuclear layer of retina | The intermediate layer of neurons in the retina composed largely of bipolar cells. Synonym: internal nuclear layer of retina, stratum ganglionare retinae, stratum nucleare internum retinae. (05 Mar 2000) |
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| 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) |
| external nuclear layer of retina | The outermost layer of the cerebral layer of retina, composed of the primary receptor cells of the retina; the stratum consists of two sublayers: 1) an external layer made up of the rods and cones, the photosensitive processes of the receptor cells, and 2) the external nuclear layer containing the cell bodies of these cells; the external limiting membrane forms a perforated supporting plate between the two sublayers; the name refers to the fact that the retinal receptor cells are a specialised form of (epithelial) ependyma cell and thus, in a sense, are comparable to the neuroepithelial cells (e.g., hair cells) of other sense organs. Synonym: external nuclear layer of retina, stratum neuroepitheliale retinae, stratum nucleare externum retinae. (05 Mar 2000) |
| rod nuclear cell | <pathology> Immature neutrophils released from the bone marrow reserve in response to acute demand. (18 Nov 1997) |
| proliferating cell nuclear antigen | Acidic nuclear protein (33 kD) highly expressed in dividing cells. Interacts with D type cyclins. (18 Nov 1997) |
| 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 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) |