Sensation disagreeable

Other chemical sensations associated with the trigeminal ganglion include temperature sensations such as the coolness (35) associated with menthol and the heat associated with capsaisin. Oral sensations elicited by chemical solutions also include tactile sensations such as smooth, dry, or powdery, and such disagreeable sensations as pain. Some of these sensations may represent different degrees of activation of a single system or the activation of several separate systems. 

Restless legs syndrome (RLS) is a disorder that usually occurs prior to sleep onset and is characterised by disagreeable sensations, that cause an almost irresistible urge to move the legs. The sensation is... 

Certain miscellaneous observations have a bearing on our discussion of differences in taste reactions. For example, it is well recognized in hospitals that, although a barium sulfate emulsion is perfectly tasteless and innocuous to many individuals, to others it is very disagreeable. It would appear that the taste threshold for barium sulfate varies from individual to individual and that this substance is soluble enough to give a sensation of taste to some individuals. 

Thus, below the AEGL-1 values, there may be specific effects, such as the perception of a disagreeable odor, taste, or other sensations (mild sensory irritation). In some people, that exposure level could result in mild lacrimation or coughing. Since there is a continuum in which it is difficult to judge the appearance of discomfort in animal studies and human experiences, the... 

The pure substance is a colorless, syrupy liquid, which, when poured into H,0. sinks under it before mixing. It has a disagreeable, metallic taste, somewhat resembling tirat of tartar emetic. When token into the mouth it produces a tingling sensation, increases the flow of saliva, and bleaches the tissues with which it comes in contact It is still liquid at —80 (— 22 P.). It is very unstable, and, even in darkness and at ordinary temperatures, is gradually decom )osed. At 20 (68 F.) the decomposition takes place more quickly, and at 100 (212 F.) rapidly and with effervescence. The dilute substance, however, is comparatively stable, and may be boiled and even distilled without suffering decomposition. 

Bromine is, at ordinaiy temperatures, a deep brownish-red liquid, boiling at 113 its Sp. G. is 2 99. Its vapour resembles that of nitrous acid, but has a very peculiar disagreeable pungent smell. It is poisonous, and acts so strongly on the living membrane of the nose, that the mere smelling to a bottle of bromine is often followed by a painful sensation in the nostril, attended wdth a copious flow of tears, lasting for hours, or even for days. 

Sensations are attended by pleasure or pain and man for his part has the capacity to transform such momentary impressions into permanent sentiments of an agreeable or disagreeable character, and then to experience these sentiments when he either observes or recollects the pleasures and pains of other sentient beings. 

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