Hereditary spastic paraplegia (HSP) refers to a group of inherited disorders that cause weakness and stiffness of the leg muscles, which gradually gets worse over time. A person with HSP is likely to have inherited an abnormal gene from their parents that causes the long nerves in their spine to deteriorate. These nerves control voluntary movement.
This means that muscles in the lower body do not receive the correct messages telling them to relax or contract. It leads to spasticity (abnormally stiff and rigid muscles) and weakness in the leg muscles, which progressively gets worse. Most forms of HSP mainly affect the lower body the arms and hands are usually unaffected. On average, the symptoms of HSP start in mid-adulthood, although it can start as late as age 70 or in young children.Reflexes become exaggerated, and leg cramps, twitches, and spasms occur, making leg movements stiff and jerky (called a spastic gait). Walking gradually becomes more difficult.Treatment focuses on relieving symptoms. Physical therapy and exercise can help maintain mobility and muscle strength, improve range of motion and endurance, reduce fatigue, and prevent cramps and spasms.
High-impact journals are those considered to be highly influential in their respective fields. The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information.The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
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Last date updated on July, 2014