A hormone is a chemical messenger that enables communication between cells. Hormones are secreted by the glands of the endocrine system and they serve to maintain homeostasis and to regulate numerous other systems and processes, including reproduction and development.
Clinical neuropsychologists use this knowledge in the assessment, diagnosis, treatment, and or rehabilitation of patients across the lifespan with neurological, medical, neurodevelopmental and psychiatric conditions, as well as other cognitive and learning disorders.n order to become a clinical neuropsychologist in the US and be compliant with Houston Conference Guidelines, the completion of a 4-year undergraduate degree in psychology and a 4 to 5-year doctoral degree (Psy.D. or Ph.D. ) must be completed.
Some clinical psychologists focus on certain populations, such as children or the elderly, or certain specialties, such as the following: 1  Health psychologists study how psychological factors affect health and illness. 2  Neuropsychologists study the relation between the brain and behavior.sychologists can complete a Ph.D. in psychology or a Doctor of Psychology (Psy.D.) degree. A Ph.D. in psychology is a research degree that culminates in a comprehensive exam and a dissertation based on original research.