Some peahens start laying fertile eggs after their first birthday. Peacocks take more time to become mature than the peahens. Usually it takes about 3 years to gain maturity of a peacock. After three years their tail also matures.
Patients with disorders such as Parkinson's disease, Alzheimer's disease or multiple sclerosis may use a neurologist as their principal care physician. In a consulting role, a neurologist will diagnose and treat a neurological disorder and then advise the primary care physician managing the patient's overall health.
The neurologist's task is to identify pathologic abnormalities in the brain, spinal cord, and peripheral nervous system and recommend a course of treatment. Psychiatrists tend to restrict their practice to disorders of the brain and, more specifically, the mind.