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The myth of the tongue map: that 1 tastes bitter, 2 tastes sour, 3 tastes salty, and 4 tastes sweet. The tongue map or taste map is a common misconception that different sections of the tongue are exclusively responsible for different basic tastes. It is illustrated with a schematic map of the tongue, with certain parts of the tongue labeled ...
Ageusia (from negative prefix a-and Ancient Greek γεῦσις geûsis 'taste') is the loss of taste functions of the tongue, particularly the inability to detect sweetness, sourness, bitterness, saltiness, and umami (meaning 'savory taste'). It is sometimes confused with anosmia – a loss of the sense of smell.
Geographic tongue is a common condition, affecting 2-3% of the adult general population, [1] although other sources report a prevalence of up to 14%. [12] It is one of the most common tongue disorders that occurs in children. [21]
These taste and smell clinics are focusing their research on better understanding the mechanisms involved in gustatory function and taste disorders such as dysgeusia. For example, the National Institute on Deafness and Other Communication Disorders is looking into the mechanisms underlying the key receptors on taste cells, and applying this ...
Tardive dyskinesia (TD) is an iatrogenic disorder that results in involuntary repetitive body movements, which may include grimacing, sticking out the tongue or smacking the lips, [1] which occurs following treatment with medication. [6] [7] Additional motor symptoms include chorea or athetosis. [1]
Tongue lesions are very common. For example, in the United States one estimated point prevalence was 15.5% in adults. [10] Tongue lesions are more common in persons who wear dentures and tobacco users. [10] The most common tongue conditions are geographic tongue, followed by fissured tongue and hairy tongue. [10]
It also carries taste sensations from the anterior two-thirds of the tongue, through the chorda tympani nerve (a branch of the facial nerve). Because of this, people with Bell's palsy may present with loss of taste sensation in the anterior 2 ⁄ 3 of the tongue on the affected side. [15]
A burning sensation in the mouth may be primary (i.e. burning mouth syndrome) or secondary to systemic or local factors. [1] Other sources refer to a "secondary BMS" with a similar definition, i.e. a burning sensation which is caused by local or systemic factors, [16] or "where oral burning is explained by a clinical abnormality". [17]