Borderline personality disorder
Most experts agree that there is no single cause of borderline personality disorder (BPD). It is probably caused by a combination of factors.
These include:
genetics - genes inherited from your parents can make you more vulnerable to developing BPD, given certain environmental factors
neurotransmitters - these are "chemical messenger" used by your brain to transmit signals between brain cells; certain neurotransmitters can have a significant effect on mood and behavior
Neurobiology - this term describes the structure and function of the brain and nervous system; it appears that some people with BPD have a number of brain regions with abnormal structure and function
environmental factors - events that happened in your past, how your relationship with your family, appear to play an important role in BPD
These are explained in more detail below.
genetics
The strongest evidence that genetics may play a role in BPD is research that studied twins.
One study found that if one identical twin had BPD, there was a chance of two-in-three that the other identical twin also have BPD.
However, these results should be interpreted with caution, and there is evidence that there is a gene for BPD.
First, you may be more likely to develop certain personality traits. For example, you can inherit from their parents a tendency to be aggressive and emotionally unstable, not to own BPD.
Second, identical twins fastest growing in the same house and the same family, then they will share many environmental factors.
neurotransmitters
It is thought that many people with BPD may have changed the operation of a neurotransmitter called serotonin in the brain.
The serotonin activity changed in the brain has been linked to depression, aggression and difficulty controlling the destructive impulses.
There is also some limited evidence that some people with BPD also alter the operation of two other neurotransmitters called dopamine and noradrenaline, which may be associated with emotional instability.
Neurobiology
The researchers used magnetic resonance imaging (MRI) scans to study the brains of people with BPD. NMR: using strong magnetic fields and radio waves to produce a detailed image of the interior of the body.
The tests showed that in many people with BPD were three parts of the brain or less than expected, or have unusual levels of activity. These parties were:
the tonsils - which plays an important role in regulating emotions, especially the "negative" emotions such as fear, anxiety and aggression
the hippocampus - which helps regulate behavior and self-control
the orbitofrontal cortex - which is involved in making planning and decision making
Problems with these parts of the brain may also contribute to the symptoms of BPD.
The development of these parts of the brain is affected by their early training (see below). These parts of your brain are also responsible for regulating mood, which may account for some of the problems that people with BPD have in intimate relationships.
Environmental factors
A number of environmental factors seem to be common and widespread among people with BPD. These include:
being a victim of emotional abuse, physical or sexual
being exposed to chronic fear or anxiety as a child
being neglected by one or both parents
growing with another family member who had a serious illness mental health, such as bipolar disorder or a drinking problem or drug abuse
A person's relationship with their parents and family has a strong influence on how they come to see the world and what they believe about other people.
Fear not resolved, anger and anxiety since childhood can lead to a variety of adult distorted thought patterns, as to idealize others, waiting for the other to be a father to you, waiting for other people to intimidate you, and behaving like if other people are adults and you are not.
Photo: borderline personality disorder

Most experts agree that there is no single cause of borderline personality disorder (BPD). It is probably caused by a combination of factors.
These include:
genetics - genes inherited from your parents can make you more vulnerable to developing BPD, given certain environmental factors
neurotransmitters - these are "chemical messenger" used by your brain to transmit signals between brain cells; certain neurotransmitters can have a significant effect on mood and behavior
Neurobiology - this term describes the structure and function of the brain and nervous system; it appears that some people with BPD have a number of brain regions with abnormal structure and function
environmental factors - events that happened in your past, how your relationship with your family, appear to play an important role in BPD
These are explained in more detail below.
genetics
The strongest evidence that genetics may play a role in BPD is research that studied twins.
One study found that if one identical twin had BPD, there was a chance of two-in-three that the other identical twin also have BPD.
However, these results should be interpreted with caution, and there is evidence that there is a gene for BPD.
First, you may be more likely to develop certain personality traits. For example, you can inherit from their parents a tendency to be aggressive and emotionally unstable, not to own BPD.
Second, identical twins fastest growing in the same house and the same family, then they will share many environmental factors.
neurotransmitters
It is thought that many people with BPD may have changed the operation of a neurotransmitter called serotonin in the brain.
The serotonin activity changed in the brain has been linked to depression, aggression and difficulty controlling the destructive impulses.
There is also some limited evidence that some people with BPD also alter the operation of two other neurotransmitters called dopamine and noradrenaline, which may be associated with emotional instability.
Neurobiology
The researchers used magnetic resonance imaging (MRI) scans to study the brains of people with BPD. NMR: using strong magnetic fields and radio waves to produce a detailed image of the interior of the body.
The tests showed that in many people with BPD were three parts of the brain or less than expected, or have unusual levels of activity. These parties were:
the tonsils - which plays an important role in regulating emotions, especially the "negative" emotions such as fear, anxiety and aggression
the hippocampus - which helps regulate behavior and self-control
the orbitofrontal cortex - which is involved in making planning and decision making
Problems with these parts of the brain may also contribute to the symptoms of BPD.
The development of these parts of the brain is affected by their early training (see below). These parts of your brain are also responsible for regulating mood, which may account for some of the problems that people with BPD have in intimate relationships.
Environmental factors
A number of environmental factors seem to be common and widespread among people with BPD. These include:
being a victim of emotional abuse, physical or sexual
being exposed to chronic fear or anxiety as a child
being neglected by one or both parents
growing with another family member who had a serious illness mental health, such as bipolar disorder or a drinking problem or drug abuse
A person's relationship with their parents and family has a strong influence on how they come to see the world and what they believe about other people.
Fear not resolved, anger and anxiety since childhood can lead to a variety of adult distorted thought patterns, as to idealize others, waiting for the other to be a father to you, waiting for other people to intimidate you, and behaving like if other people are adults and you are not.
Drajosiane Odla...