| OCP | octacalcium phosphate; ocular cicatricial pemphigoid; oral case presentation; oral contraceptive pil... |
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| OET | oral endotracheal tube; oral esophageal tube |
| OHI | Occupational Health Institute; operative hypertension indicator; oral hygiene index; Oral Hygiene In... |
| CDH | 1) Chronic Daily Headache = CTH = ... |
| DCH | Daily Chronic Headache |
| sick headache | <disease> An often familial symptom complex of periodic attacks of vascular headache, usually temporal and unilateral in onset, commonly associated with irritability, nausea, vomiting, constipation or diarrhoea and often photophobia, attacks are preceded by constriction of the cranial arteries, usually with resultant prodromal sensory (especially ocular) symptoms and commence with the vasodilation that follows. Origin: Gr. Hemikrania = an affection of half of the head (18 Nov 1997) |
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| spinal headache | A headache that can occur after a lumbar puncture is performed. Patients who lie flat on their stomach for one hour immediately after lumbar puncture, followed by 12 hours on their back, have a decreased incidence of spinal headaches. (27 Sep 1997) |
| nodular headache | Radiating pain in the head accompanied by nodular swellings in the splenius, frontalis, trapezius, and other muscles. (05 Mar 2000) |
| symptomatic headache | A headache secondary to another organic condition. Synonym: reflex headache. (05 Mar 2000) |
| organic headache | Headache due to intracranial disease. (05 Mar 2000) |
| fibrositic headache | Headache centreed in the occipital region due to fibrositis of the occipital muscles; tender areas are present and, commonly, tender nodules are found in the scalp in the lower occipital region. (05 Mar 2000) |
| active length-tension curve | The relationship between active isometric tension and preload (rest length) for a contracting muscle. (05 Mar 2000) |
| anxiety tension state | A milder form of an anxiety disorder. See: anxiety disorders. (05 Mar 2000) |
| arterial tension | The pressure of the blood within an artery, the arterial pressure. Also called the intra-arterial pressure. (12 Dec 1998) |
| passive length-tension curve | The relationship between passive tension and preload (rest length) for a muscle at rest. (05 Mar 2000) |
| cervical tension syndrome | <syndrome> A clinical complex of pain, tenderness, tight neck musculature, vasomotor instability, and ill-defined symptoms such as dizziness and blurred vision as the result of trauma to the neck. Also variously termed occipital or suboccipital neuralgia or neuritis; cervical tension syndrome; cervical myospasm, myositis, or fibrositis. Synonym: cervical fibrositis, cervical tension syndrome. (05 Mar 2000) |
| premenstrual tension | <syndrome> A combination of emotional, physical, psychological, and mood disturbances that occur after ovulation and normally end with the onset of the menstrual flow. (12 Dec 1998) |
| premenstrual tension syndrome | <syndrome> A combination of emotional, physical, psychological, and mood disturbances that occur after ovulation and normally end with the onset of the menstrual flow. (12 Dec 1998) |
| surface tension | The expression of intermolecular attraction at the surface of a liquid, in contact with air or another gas, a solid, or another immiscible liquid, tending to pull the molecules of the liquid inward from the surface; dimensional formula: mt-2. (05 Mar 2000) |
| surface tension theory of narcosis | That substances which lower the surface tension of water pass more readily into the cell and cause narcosis by decreasing metabolism. (05 Mar 2000) |