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.
Cerebral Dominance: Language Functions of The Left and Right Hemispheres. The perisylvian cortex of the left hemisphere is involved in language production and comprehension, which is why it is often referred to as dominant, or said to speak (Ojemann, G. A., 1991; Purves et al., 2008).