If, after careful study, a physician determines a patientâs underlying cause of chest pain to be angina and the patient has a documented history of CAD, then CAD will be sequenced as the principal diagnosis followed by the appropriate code for the angina (AHA Coding Clinic for ICD-9-CM, 2001, third quarter, page 15).
Not all functions of the hemispheres are shared. In general, the left hemisphere controls speech, comprehension, arithmetic, and writing. The right hemisphere controls creativity, spatial ability, artistic, and musical skills. The left hemisphere is dominant in hand use and language in about 92% of people.
The left hemisphere is largely responsible for language. The right hemisphere is important for interpreting visual cues and spatial processing. The cerebrum controls coordination, temperature, sight, sound, reasoning, learning, and emotions. The space between the two hemispheres is called the great longitudinal fissure. The corpus callosum connects the two sides and transfers signals from one side of the brain to the other. The cerebrum has billions of neurons and glia that form the cerebral cortex, its outermost layer.