Key Points. 1  Cancer treatment can cause mouth and throat problems. 2  Oral complications may be caused by the treatment itself (directly) or by side effects of the treatment (indirectly). 3  Complications may be acute (short-term) or chronic (long-lasting).
Language deprivation. Language deprivation is associated with the lack of linguistic stimuli that are necessary for the language acquisition processes in an individual, usually in a very impoverished environment. Experiments involving language deprivation are very scarce due to the ethical controversy associated with it.
Historical Linguistics. Historical linguistics, the study of language change, is the oldest subfield of modern linguistics. The success of historical linguistics in the nineteenth century was a major force behind the growth of synchronic linguistics in the twentieth.