Vygotsky's social account of psychology is comprehensible when viewed in relation to his political views and his early work experience. A brief discussion of this context is therefore in order before explaining the details of his psychological stand- point.
1 Central cyanosis and its causes are all associated with peripheral cyanosis. 2  Decreased pumping of blood by the heart or reduced cardiac output. 3  This is seen in heart failure or circulatory shock. 4  Diseases of circulation like thrombosis or embolism. 5  Constriction of blood vessels of the limbs, fingers and toes.
There are over 100 types of PN and many different causes for it. They include injury, inherited diseases, chronic conditions, infections, medicines, lack of vitamins or HIV itself. A common example of PN is carpal tunnel syndrome. Peripheral neuropathy can be due to damage to the coating (myelin) of the nerve endings. The damage may also be due to a breakdown of the nerve endings themselves. Some chronic conditions can also cause PN, like diabetes, arthritis and lupus, as well as some viral infections, like CMV or herpes.