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Helena Daoud

Exercise, pleasure and the brain | Psychology Today - 0 views

  • And so, like nicotine or orgasm or food or gambling, it can become a substrate for addiction as well.
  • This can indeed be a genuine addiction
  • Exercise has a dramatic antidepressive effect.
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  • long-term improvements in mental function and is the single best thing one can do to slow the cognitive decline that accompanies normal aging.
  • a short-lasting, deeply euphoric state that's well beyond the simple relaxation or peacefulness felt by many following intense exercise.
  • there are different types of endorphins
  • that are synthesized within the brain and therefore could cause euphoria without crossing the blood-brain barrier.
  • The researchers found that this long run was associated with increased opioid release in the runner's' brains, particularly in the prefrontal cortex
  • and the anterior cingulate cortex and insula
  • It's likely that runner's high is not entirely mediated by the opioid system: Exercise also increases the levels of endocannabinoids, the brain's natural cannabis-like molecules, in the bloodstream.
  • Thus exercise-induced increases in endocannabinoid levels in blood are presumably mirrored in the brain and could also contribute to the euphoria of runner's high.
  •  
    Exercise is an addiction for some, but is also a great way to help with illnesses and depression. Exercise helps blood flow through the brain and keeps us healthy.
alicia waid

Cannabis and mental health - 0 views

    • alicia waid
       
      Cannabis is too easy to access (become more and more easy to access, as well).  People are under the influence that smoking cannabis is not bad for you, and that it is, in fact, better than smoking tobacco.  However, this is not the case, as researchers are starting to see that cannabis might actually be causing mental illnesses. 
  • most drug users take other drugs in addition to cannabis create methodological problems and explain the dearth of reliable evidence
    • alicia waid
       
      It is believed that cannabis triggers the onset or relapse of schizophrenia in predisposed people, however this cannot be certain, because many of the people being researched on have taken other drugs, which makes it hard to determine wether the triggers are from the cannabis or from any of the other drugs.
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    • alicia waid
       
      During a test (that occurred over 15 years), it was discovered that by smoking marijuana during adolescence, you are increasing your risk of developing schizophrenia.  However, they are not certain that marijuana is the only cause: Other drugs might be a factor too, and a few other concepts. 
    • alicia waid
       
      In addition, research is showing that cannabis also has a relation with depression.  It was studied over a period of 15 years, and results show that by smoking cannabis, you are increasing your risk of developing a major depression.  It was also showed that the use of cannabis also increases the idea of suicide and inability to feel pleasure.  
    • alicia waid
       
      Although only few studies were talked about in the National institution of Health, they are enough to prove that cannabis increases ones rist of developing schizophrenia AND depression.  The studies also provide very little support to prove that there is also a link between marijuana and mental health problems that are largely due to self medication (harder to prove).  These studies are not trying to say that if you smoke cannabis you will develop schizophrenia or depression, however it is saying that those who are more vulnerable will.  
    • alicia waid
       
      It is important to note that those who use cannabis must reduce their usage if they want their risk of developing schizophrenia or depression to decrease.  It was estimated that if you were to have reduced your exposure to cannabis, the incidence of psychosis would have reduced treatment by as much as 50% (Dutch study).
    • alicia waid
       
      In a Swedish study, it was proved that the use of cannabis increases your chances of developing schizophrenia by 30%.  
    • alicia waid
       
      Even more people are anticipating that cannabis will continue to contribute to even more cases of mental illnesses in the future.
    • alicia waid
       
      With further analysis, it has been discovered that cannabis is the drug associated with the possibility of developing schizophrenia (and not the impact of other drugs).  
    • alicia waid
       
      During another experiment, it was found that 59 people with a basic diagnosis of a psychotic disorder show a strong association with the use of cannabis and psychosis.  It is evident that the longer you've been smoking the drug, the more your symtoms will worsen(there is a higher chance), just like with any other drug.  
    • alicia waid
       
      In New Zealand, it was discovered that people who smoke marijuana are three times more likely to develop schizophrenia, by the age of 15 or 18.  
    • alicia waid
       
      An Australian study was also made that shows the more you smoke cannabis, the higher your rates of anxiety or depression might be.  It was proven that this link is more prone to young women than young men, however this was not proved in any other study (except the australian one).  
    • alicia waid
       
      It was proven, however, that any young human being that has used cannabis three times or more by the age of 18 is more likely to have some sort of depressive disorder by the age of 26! (And unfortunately, this was proved even to those that stopped smoking cannabis and got themselves under control.  After the first 3 times, it was too late).
  • 1990s
  • The link between cannabis and psychosis is well established
  • link between use of marijuana and depression
  • triggers the onset or relapse of schizophrenia in predisposed people and also exacerbates the symptoms generally
  • use of marijuana during adolescence increased the risk of schizophrenia in a dose-response relation
  • possible causal role of other drugs, and prodromal symptoms of schizophrenia
  • led to the use of cannabis, rather than cannabis triggering the psychosis.
  • is associated with later schizophrenia and that this is not explained by prodromal symptoms
  • cannabis
  • relation between
  • strong association between use of cannabis and psychosis
  • Participants who showed psychotic symptoms at baseline and used cannabis had a worse outcome
  • used cannabis three times or more by age 15 or 18
  • more likely to have schizophreniform disorder at age 26
  • cannabis increased the risk of major depression
  • increase in suicidal ideation and anhedonia
  • the use of cannabis and anxiety or depression in a large cohort of 14-15 year olds followed for seven years
  • Length of exposure to use of cannabis predicted the severity of the psychosis
  • higher rates of anxiety or depression
  • frequency
  • study in the New Zealand
  • did not find an association between cannabis use at age 15 and depressive disorder at age 26
  • that young people who had used cannabis three times or more by age 18 were more likely to have a depressive disorder at age 26
  • findings strengthen the argument that use of cannabis increases the risk of schizophrenia and depression
  • importance of reducing the use of cannabis in people who use it
  • exposure to cannabis would have reduced the incidence of psychosis requiring treatment by as much as 50%
  • showing that the use of cannabis increased the risk of schizophrenia by 30%
  • cannabis will contribute to more episodes or new cases of the illness
Daryl Bambic

The Secret of Self-Esteem | Psychology Today - 0 views

  • In the absence of confidence, courage takes over.
  • courage, on the other hand, operates in the realm of the unknown
  • Courage is more noble than confidence
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  • it cannot offer a secure foundation for our self-esteem.
  • People with healthy self-esteem are able to take risks and to give their all to a project or ambition, because, although failure may hurt or upset them, it is not going to damage or diminish them.
  • It is instructive to compare healthy self-esteem with pride and also with arrogance. If self-confidence is “I can” and self-esteem is “I am”, then pride is “I did”. To feel proud is to take pleasure from the goodness of our past actions and achievements.
  • arrogance stems from hunger and emptiness.
  • so there can be no such thing as excessive self-esteem. Instead, it betrays all the opposite.
  • Whenever we live up to our dreams and promises, we can feel ourself growing. Whenever we fail but know that we have given our best, we can feel ourself growing. Whenever we stand up for our values and face the consequences, we can feel ourself growing. Whenever we come to terms with a difficult truth, we can feel ourself growing. Whenever we bravely live up to our ideals, we can feel ourself growing. That is what growth depends on. Growth depends on bravely living up to our ideals, not on the ideals of the bank that we work for, or our parents’ praise, or our children’s successes, or anything else that is not truly our own but, instead, a betrayal of ourself.
  • Nor is he someone who ever betrayed knowledge and integrity in favour of deception and unconsciousness.
  • More than a great philosopher, Socrates was the living embodiment of the dream that philosophy might one day set us free.
Daryl Bambic

Animal Emotions: Exploring Passionate Natures | BioScience | Oxford Academic - 1 views

  • because emotions have evolved in specific contexts.
  • Categorically denying emotions to animals because they cannot be studied directly does not constitute a reasonable argument against their existence.
    • Daryl Bambic
       
      To deny that something is real without first investigating its existence is not good science.
  • Field research
    • Daryl Bambic
       
      meaning in nature and not in a lab
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  • phenotypes
    • Daryl Bambic
       
      This means a type of behaviour related to a species, like mating behaviour for example.
  • My goal is to convince skeptics that a combination of “hard” and “soft” interdisciplinary research is necessary to advance the study of animal emotions.
  • broadly defined as psychological phenomena that help in behavioral management and control
  • Likewise, no single theory of emotions captures the complexity of the phenomena called emotions
  • It is important to extend our research beyond the underlying physiological mechanisms that mask the richness of the emotional lives of many animals and learn more about how emotions serve them as they go about their daily activities
    • Daryl Bambic
       
      Ignore the previous sentence because this one explains it: the study of emotions needs to focus more on how they help us in life and less on the biology of them.
  • emotions are real and that they are extremely important,
  • René Descartes
    • Daryl Bambic
       
      The philosopher who said, "I think therefore I am". He divided humans into mind/body.
  • B. F. Skinner
    • Daryl Bambic
       
      Skinner was a pioneer in behaviour conditioning. He taught that emotions, because we can't measure them, are not important to understanding behaviour.
  • Why then are there competing views on the nature of animal emotions? In part, this is because some people view humans as unique animals, created in the image of God
  • researchers studying animal behavior came to realize that there was too little in studies of animal emotions and minds that was directly observable, measurable, and verifiable, and chose instead to concentrate on behavior because overt actions could be seen, measured objectively, and verified
  • Most researchers now believe that emotions are not simply the result of some bodily state that leads to an action
  • William James and Carl Lange
  • James and Lange argued that fear, for example, results from an awareness of the bodily changes (heart rate, temperature) that were stimulated by a fearful stimulus.
  • Walter Cannon's criticisms
  • there is a mental component that does not have to follow a bodily reaction
  • drugs producing bodily changes like those accompanying an emotional experience
  • do not produce the same type of conscious experience of fear
    • Daryl Bambic
       
      The textbook spoke of this.
  • Primary emotions, considered to be basic inborn emotions
  • Natural selection has resulted in innate reactions that are crucial to individual survival.
  • are wired into the evolutionary old limbic system (especially the amygdala), the “emotional” part of the brain
  • substrate
    • Daryl Bambic
       
      Substitue 'circuit' for this word
  • . Each is connected to the other two but each also has its own capacities
  • current research (LeDoux 1996) indicates that all emotions are not necessarily packaged into a single system, and there may be more than one emotional system in the brain.
  • Secondary emotions are those that are experienced or felt, evaluated, and reflected on. Secondary emotions involve higher brain centers in the cerebral cortex.
  • ethologists
    • Daryl Bambic
       
      Ethology is the study of animal behaviour and mind
  • cognitive ethologists want to know what it is like to be another animal.
  • concerns how emotions and cognition are linked
  • A sense of self in the act of knowing is created,
  • various brain structures map both the organism and external objects
  • I am inclined merely to delete it [the mental realm] from biological explanation, because it is an entirely private phenomenon, and biology must deal with the publicly demonstrable.”
  • abanac postulated that the first mental event to emerge into consciousness was the ability of an individual to experience the sensations of pleasure and displeasure
  • Examples of animal emotions
  • Social play
  • Studies of the chemistry of play support the idea that play is enjoyable.
  • dopamine (and perhaps serotonin and norepinephrine)
  • rats enjoy being playfully tickled.
  • grief in geese
  • grief and depression in orphan elephants is a real phenomeno
  • It is unlikely that romantic love (or any emotion) first appeared in humans with no evolutionary precursors in animals
  • common brain systems and homologous chemicals underlying love that are shared among humans and animals
  • No one discipline will be able to answer all of the important questions that still need to be dealt with in the study of animal emotions
  • However, research that reduces and minimizes animal behavior and animal emotions to neural firings, muscle movements, and hormonal effects will not likely lead us significantly closer to an understanding of animal emotions.
  • All research involves leaps of faith from available data to the conclusions
    • Daryl Bambic
       
      What do you think about this sentence?
  • studies of the behavior of captive animals
  • Field work also can be problematic. It can be too uncontrolled to allow for reliable conclusions to be drawn.
  • behavior is primary; neural systems subserve behavior
  • Emotions are an integral part of human life, so why not for other animals?
  • in many instances, differences in degree rather than differences in kind.
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