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Introduction:social networks have been established around the world to communicate between individuals But as the most popular social network, Facebook network in most countries welcome the public, especially the younger generation is facing and now one of the most showbiz world sites that many people in different walks of life and has attracted Facebook users join the network through activities such as sharing music, Thoughts  Film, play, announcing the public to communicate with each other to form groups various messages. Social networks can be used and influence in various fields of cultural, personal, social, and mental .One of the areas with the presence of virtual social networks is to change, is social wellbeing especially in members of the younger generation. Students are among the largest range of audiences and activist networks are Facebook. they familiar with cyber space in university because of the possibilities for using the Internet And this space, cognitive orientation, emotional, cultural and practical that overshadowed them That consequence of the impact on all aspects of life, including social wellbeing of individuals, so The purpose of this study was to investigate the relationship between use of Facebook social networks and Social wellbeing among students in Isfahan University.Materials &Method:The research method was survey or descriptive. The population of all the students was studying in the academic year 1391- 1392 that 300 students of which selected with Random cluster sampling method as sample size. The sample selected of humanities - Engineering and Basic Sciences departments. The instrument used in this study was a questionnaire that was made by researchers to relationships social wellbeing and usage of social network Facebook, which included three parts: demographic information (age, gender, profession, and education), social networking and social wellbeing. Questions of social wellbeing according to the Keynesian approach as a model for defining and providing indicators of social health in five dimensions of social cohesion, social acceptance, social participation, social adaptation and social progress was made.Questions the usage of social networks such as internet speed, internet access and the skills to use the Internet was built five degree range. To valid questionnaires were administered on a sample of 30 individuals other than members of the group by using the software Spss19 overall Cranach's alpha of 85%.Discussion of result &Conclusion:Descriptive analysis of the data showed that the largest age group of Facebook user was 18 -23 with %82. In terms of gender, in this study, more female students with 69% than male students were using the Facebook network. Also undergraduate students with %67 compared to the master and PhD used the Facebook network. The highest use of the network between 2 to 3 hours a day.  Average student use of social network Facebook is 4/91 to score higher in this network gives students and it shows the popularity of the network with students. Users of social wellbeing were 91/60, which represents the average score on the community's social wellbeing. Among Subscales of social wellbeing, social acceptance scale with the highest average score of 20/15 and social adjustment scale showed the lowest average 17/74. There was an inverse relation between the use of social network Facebook and Social wellbeing of students But this is in reverse order means that with the increasing use of social networks Facebook social wellbeing of users decreases .Also among the subscales of Social wellbeing, Social cohesion, Social acceptance ,Social conformity and Social prosperity subscales had significant negative relationship with social network Facebook  and only Social partnership Subscales has significant positive relationship with Facebook network And the use of social network Facebook relationship with the participation of the user community and was associated with increased use of social network participation rate increases. This result can be interpreted that by increasing the use of individual Facebook network groups and members familiar with several different classifications and trying to accustom them according to your interests and this subject was Extensive communication to establish yourself and this increased social participation in activities and programs for groups of users, and many more participate. Today virtual network environment different from the traditional interaction between people is established that this effect is undeniably left social relations, Therefore, regardless of the requirements such as gender, class, ethnicity, race and place and connect with each other based on their new identities show, so In this space coherence, compliance, social acceptance, and the users decrease the amount of time your alienation and the society in which it is a member feels. Also in cyberspace more people are trying to follow other members of a virtual community comply with the models and criteria so, The development of social and individual creativity are reduced over time to those without creativity and become a follower of the values and interests of others. Despite significant relationship in this study between social networks and social wellbeing of students has proven to be highly suggested various institutions was thinking about the culture and proper use of social networks such as Facebook among young people.

Explains that the hereditary neurodegenerative disease spinal muscular atrophy (SMA) with childhood onset is a common cause of infant mortality, and is characterized by selective loss of spinal cord motor neurons leading to muscle atrophy. Mutation in the survival motor neuron (SMN) gene; SMN protein implicated in diverse nuclear processes including splicing, ribosome formation, and gene transcription.