noisemagician
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Research
Risk factors for mental illness include genetic inheritance, such as parents having depression.[33]
In depression, parenting risk factors include parental unequal treatment,[34] and there is association with high cannabis use.[35]
In schizophrenia and psychosis, risk factors include migration and discrimination, childhood trauma, bereavement or separation in families, and abuse of drugs,[36] including cannabis.[35]
In anxiety risk factors may include family history (e.g. of anxiety), temperament and attitudes (e.g. pessimism),[37] and parenting factors including parental rejection, lack of parental warmth, high hostility, harsh discipline, high maternal negative affect, anxious childrearing, modelling of dysfunctional and drug-abusing behaviour, and child abuse (emotional, physical and sexual).[38]
Correlations of mental disorders with drug use include cannabis,[39] alcohol[40] and caffeine.[41]
In February 2013 a study found common genetic links between five major psychiatric disorders: autism, ADHD, bipolar disorder, major depressive disorder, and schizophrenia.[42]
Abnormal functioning of neurotransmitter systems has been implicated[citation needed] in several mental disorders, including serotonin, norepinephrine, dopamine and glutamate systems. Differences have also been found in the size or activity of certain brain regions in some cases. Psychological mechanisms have also been implicated, such as cognitive (e.g. reasoning) biases, emotional influences, personality dynamics, temperament and coping style.
Studies have indicated[citation needed] that variation in genes can play an important role in the development of mental disorders, although the reliable identification of connections between specific genes and specific categories of disorder has proven more difficult. Environmental events surrounding pregnancy and birth have also been implicated. Traumatic brain injury may increase the risk of developing certain mental disorders. There have been some tentative inconsistent links found to certain viral infections,to substance misuse, and to general physical health.
Social influences have been found to be important[citation needed], including abuse, neglect, bullying, social stress, traumatic events and other negative or overwhelming life experiences. The specific risks and pathways to particular disorders are less clear, however. Aspects of the wider community have also been implicated,[citation needed] including employment problems, socioeconomic inequality, lack of social cohesion, problems linked to migration, and features of particular societies and cultures.
Source: wiki.
Being mentally weak has nothing to do about it. Also what do you exactly mean by mentally weak.
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