| Heister, Lorenz | <person> German anatomist. Lived: 1683-1758. See: Heister's diverticulum, Heister's valve. (05 Mar 2000) |
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| Heister's diverticulum | <anatomy, vein> One of two dilated parts of the internal jugular vein: the superior bulb (Heister's diverticulum) is a dilation at the beginning of the internal jugular vein in the jugular fossa of the temporal bone; the inferior bulb is a dilat ed portion of the vein just before it reaches the brachiocephalic vein. Synonym: jugular bulb, bulbus venae jugularis. (05 Mar 2000) |
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| Heister's valve | A series of crescentic folds of mucous membrane in the upper part of the cystic duct, arranged in a somewhat spiral manner. Synonym: plica spiralis ductus cystici, Amussat's valve, Heister's valve, spiral valve of cystic duct, valvula spiralis. (05 Mar 2000) |
| Lorenz | Adolf, Austrian surgeon, 1854-1946. See: Lorenz' sign. (05 Mar 2000) |
| Lorenz' sign | <clinical sign> An obsolete sign: stiffness of the thoracic spine in early pulmonary tuberculosis. (05 Mar 2000) |