|The motor neuron disorders are a collection of progressive neurological disorders that damage motor neurons the cells that control essential voluntary muscle functioning such as speaking, walking, breathing and swallowing. Generally information from nerve cells in the brain (called upper motor neurons) are transferred to nerve cells in the brain stem and spinal cord (called lower motor neurons) and from them to definite muscles. Upper motor neurons guide the lower motor neurons to generate movements such as walking or chewing. Lower motor neurons control movement in the arms, legs, chest, face, throat and tongue.
Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results.
Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature. Systematic reviews determine an objective list of criteria, and find all previously published original research papers that meet the criteria. They then compare the results presented in these papers. Literature reviews, by contrast, provide a summary of what the authors believe are the best and most relevant prior publications.