Brain Lateralization

Left hemisphere dominance is responsible for words and letters in vision and in language. Sounds in hearing complex and ipsilateral movement, and verbal memory as well as finding meaning in memory. For memory speech writing and arithmetic and in language and spacial abilities. The right side handles faces, geometric patterns and emotional expression for vision. Non language sounds and music under audition tactile patterns and braile under touch. Movement and spacial patterns non verbal memory and perceptual aspects of memory under memory. Emotional content in language and mental rotation of shapes and geometrydirection and distance fall under spacial abilities. One of the cerebral laterization tests deal with language,one of these tests is the sodium amytal test and deals with language lateralization, which is given to people vefore neurosurgery, they inject sodium amytal in to the carotid artery which anesthetizes that hemisphere of the brain. The patient is then asked a series of common questionswhich helps the doctors map out the brain and see if there is a difference in speech after the surgery. The dichotic listening test is a set of numbers in the right ear then a different set of nukbers in the left ear then they are asked to repeat all the numbers that were said to them. In functional brain imaging someone performs an action and it is monitored by a P.E.T machiene or a M.R.I machiene and on language tests there is usually more activity on the left than on the right. The cimeria figures test shows how each hemisphere sees people in pictures, a split brain will see each picture put together.