Pain is an unpleasant emotional and sensory sensation which is actually or potentially damages the tissue or described in terms of such damage. Etiology and Neurophysiology Neuroanatomy of pain transmission The majority of tissues and organs are innervated by special sensory receptors (nociceptors) connected to primary afferent nerve fibers of differing diameters. Small myelinated Aδ fibers and unmyelinated C fibers …

What is Parkinson’s Disease Parkinson’s disease is the most common cause of Parkinsonism and is the second most common neurodegenerative disease, after Alzheimer’s disease. Although descriptions of the condition appeared before the nineteenth century, it was James Parkinson’s eloquent account in 1817 that fully documented the clinical features of the illness now bearing his name. The identification of dopamine deficiency …

What is Schizophrenia The concept of schizophrenia can be difficult to understand. The presentation of schizophrenia can be extremely varied, with a great range of possible symptoms. There are also many misconceptions about the condition of schizophrenia that have led to prejudice against sufferers of the illness. People with schizophrenia are commonly thought to have low intelligence and to be dangerous. …