<P> The processing of visual and auditory stimuli, spatial manipulation, facial perception, and artistic ability are represented bilaterally . Numerical estimation, comparison and online calculation depend on bilateral parietal regions while exact calculation and fact retrieval are associated with left parietal regions, perhaps due to their ties to linguistic processing . </P> <P> Depression is linked with a hyperactive right hemisphere, with evidence of selective involvement in "processing negative emotions, pessimistic thoughts and unconstructive thinking styles", as well as vigilance, arousal and self - reflection, and a relatively hypoactive left hemisphere, "specifically involved in processing pleasurable experiences" and "relatively more involved in decision - making processes". Additionally, "left hemisphere lesions result in an omissive response bias or error pattern whereas right hemisphere lesions result in a commissive response bias or error pattern ." The delusional misidentification syndromes, reduplicative paramnesia and Capgras delusion are also often the result of right hemisphere lesions . </P> <P> Broca's area and Wernicke's area are linked by a white matter fiber tract, the arcuate fasciculus . This axonal tract allows the neurons in the two areas to work together in creating vocal language . In more than 95% of right - handed men, and more than 90% of right - handed women, the left hemisphere is dominant in certain aspects of language and speech processing . Left - handed people may be less lateralized than right - handed people in language function . </P> <P> Damage to either the right or left hemisphere, and its resulting deficits provide insight into the function of the damaged area . Right hemisphere damage has many effects on language production and perception . Damage or lesions to the right hemisphere can result in a lack of emotional prosody or intonation when speaking . Right hemisphere damage also has monumental effects on understanding discourse . People with damage to the right hemisphere have a reduced ability to generate inferences, comprehend and produce main concepts and a reduced ability to manage alternative meanings . Furthermore, when engaging in discourse people with right hemisphere damage, their discourse is often abrupt and perfunctory or verbose and excessive . They can also have pragmatic deficits in situations of turn taking, topic maintenance and shared knowledge . </P>

Is the difference between hemisphere in the areas underlying language function