Final answer:
The idea that the right hemisphere is the language hemisphere is incorrect. In fact, about 95% of the population predominantly uses the left hemisphere for language functions. Still, the right hemisphere contributes to understanding non-literal language and the emotional aspects of speech.
Step-by-step explanation:
The notion that the right side of the brain is known as the hemisphere of language function is not entirely accurate. It's a misconception that one side of the brain exclusively governs certain functions. In truth, while lateralization of function does occur, meaning certain cognitive processes are more dominant in one hemisphere than the other, both sides contribute to complex functions. Research has demonstrated that the left hemisphere is predominately responsible for language functions in about 95 percent of the population. However, the right hemisphere plays a significant role in interpreting figurative language, as well as contributing to the emotional aspects of speech.
It is important to acknowledge that although the left hemisphere is primarily associated with language processing, the right hemisphere can be involved in language function as well. For instance, when there is damage to the right side of the brain, a person may experience difficulty in understanding non-literal language elements such as metaphors, irony, or humor, and may display a 'flat affect' in speech, which is a reduction or absence of emotional expressiveness.
Overall, both the left and right cerebral hemispheres interact synergistically, with the corpus callosum facilitating communication between the two, to support a full range of linguistic and cognitive abilities. Therefore, while language functions are often more concentrated in the left hemisphere, the right hemisphere also plays a role in language, especially in terms of emotionality and complex language comprehension.