ABSTRACT
This chapter reviews that explanation in terms of psychological reaction to physical disorder represents an approach, which has become increasingly incapable of incorporating the results of studies. It supports the clinical overlap between different neurotic syndromes. The chapter reviews the neurotic disorders associated with the specific neurologic disorders. The study of affective disorder in Parkinson's disease suggests that different components of the disorder respond differently to different pharmacological treatments. The occurence of psychiatric illness in both neurological disorders was high, and a specific association of Huntington's disorder with affective disorder was suggested. The association of particular neurotic syndromes and particular neurologic disorders, such as obsessive-compulsive disorder with Tourette syndrome and depressive disorder with multiple sclerosis, cerebrovascular disease, and Parkinson's disease, suggest a certain specificity in the association. Neurological examination and investigation is performed on patients with psychiatric disorder for the information it provides on the disorder, and not only to define those cases needing referral to a neurologist.
