| tympanic ring | In the foetus, a more or less complete bony ring at the medial end of the cartilaginous external acoustic meatus, to which is attached the tympanic membrane. Synonym: annulus tympanicus, tympanic bone. (05 Mar 2000) |
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| tympanic sinus | A depression in the tympanic cavity posterior to the tympanic promontory. Synonym: sinus tympani. Sinus unguis, the deep cleft housing the root of the nail. Synonym: sinus of nail. (05 Mar 2000) |
| tympanic veins | Veins exiting from the tympanic cavity through the petrotympanic fissure with the chorda tympani and emptying into the retromandibular vein. Synonym: venae tympanicae. (05 Mar 2000) |
| tympanic wall of cochlear duct | The wall that separates the cochlear duct from the scala tympani; it consists of the osseous spiral lamina and the basilar membrane. Synonym: paries tympanicus ductus cochlearis, membrana spiralis, spiral membrane. (05 Mar 2000) |
| floor of tympanic cavity | The floor of the tympanic cavity; a thin plate of bone separating the tympanic cavity from the jugular fossa. Synonym: paries jugularis cavi tympani, fundus tympani, inferior wall of tympanic cavity, jugular wall of middle ear. (05 Mar 2000) |
| lateral wall of tympanic cavity | The wall formed mainly by the tympanic membrane. Synonym: paries membranaceus cavi tympani, lateral wall of middle ear, membranous wall of middle ear. (05 Mar 2000) |
| lesser tympanic spine | The posterior edge of the tympanic notch (of Rivinus). Synonym: spina tympanica minor. (05 Mar 2000) |
| adjustment disorders | Maladaptive reactions to identifiable psychosocial stressors occurring within a short time after onset of the stressor. They are manifested by either impairment in social or occupational functioning or by symptoms (depression, anxiety, etc.) that are in excess of a normal and expected reaction to the stressor. (12 Dec 1998) |
| affective disorders | A class of mental disorder's characterised by a disturbance in mood. (05 Mar 2000) |
| affective disorders, psychotic | Disorders in which the essential feature is a severe disturbance in mood (depression, anxiety, elation, and excitement) accompanied by psychotic symptoms such as delusions, hallucinations, gross impairment in reality testing, etc. (12 Dec 1998) |
| alcohol-related disorders | Mental disorders related or resulting from abuse or mis-use of alcohol. (12 Dec 1998) |
| amphetamine-related disorders | Disorders related or resulting from use of amphetamines. (12 Dec 1998) |
| anxiety disorders | Disorders in which anxiety (persistent feelings of apprehension, tension, or uneasiness) is the predominant disturbance. (12 Dec 1998) |
| articulation disorders | Disorders of speech sound production characterised by substitution, omission, and distortion of sounds. (12 Dec 1998) |
| auditory perceptual disorders | Disorders of auditory perception manifesting as difficulties with auditory memory, speech perception and sound localization. Lesions are usually in the temporal lobe. (12 Dec 1998) |