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Alex Weinstein

Stages of Parkinson's: Explanation of Stages 1-5 - 0 views

www.webmd.com/...parkinsons-stages

stages parkinson psychology

shared by Alex Weinstein on 07 Mar 11 - Cached
  • Alex Weinstein on 07 Mar 11
     
    This is how i got the information on the different stages of parkinsons
alicia waid

Teens who smoke pot at risk for later schizophrenia, psychosis - Harvard Health Publica... - 0 views

www.health.harvard.edu/...phrenia-psychosis-201103071676

schizophrenia marijuana teens smoke pot psychosis harvard health

shared by alicia waid on 06 Apr 13 - No Cached
    • alicia waid
      alicia waid on 06 Apr 13
       
      Regular marijuana use increases a teenagers chance to develop psychosis*, and developing schizophrenia*.
    • alicia waid
      alicia waid on 06 Apr 13
       
      *Psychosis: A temporary state filled with intense anxiety and hallucinations.
    • alicia waid
      alicia waid on 06 Apr 13
       
      *Schizophrenia: Disabling brain disorder that not only causes psychosis, but also problems concentrating and loss of emotional expression.
    • alicia waid
      alicia waid on 06 Apr 13
       
      In a study following 2,000 tenns as they start to develop into young adults, it was proven that young people who smoke marijuana at least 5 times were twice as likely to develop psychosis over the next 10 years of their lives compared to those who didn't smoke.
    • alicia waid
      alicia waid on 06 Apr 13
       
      It was also proven that early marijuana use could increase the speed of the onset of psychosis by three years. (Those most at risk are youths who might have some family member that is dealing with schizophrenia, or any other psychotic disorder). 
  • ...34 more annotations...
    • alicia waid
      alicia waid on 06 Apr 13
       
      These people who have family members affected by psychosis have approximately a 1 in 10 chance of developing the same condition themselves (even if they've never smoked pot).  However, if smoking marijuana, this doubles their risk (1 in 5 chance).
    • alicia waid
      alicia waid on 06 Apr 13
       
      People who are not affected by psychosis have a 7 in 1,000 chance of developing a mental disorder.
    • alicia waid
      alicia waid on 06 Apr 13
       
      People who are not affected by psychosis but smoke marijuana double their risk: 14 in 1,000.
    • alicia waid
      alicia waid on 06 Apr 13
       
      A very popular study (nearly 50,000 young Swedish soldiers were followed for 15 years) showed that those who smoked marijuana at least once were more than twice as likely to develop schizophrenia as those who had never smoked marijuana.  
    • alicia waid
      alicia waid on 06 Apr 13
       
      It was shown that the heaviest users (used more than 50 times) were 6 times more likely to become schizophrenic than the nonsmokers.  
    • alicia waid
      alicia waid on 06 Apr 13
       
      Research on the association of marijuana and the brain is in a very early stage (much is still unknown).  THC* contributes to marijuana's psychological and physical effects.
    • alicia waid
      alicia waid on 06 Apr 13
       
      *THC: One of the active compounds in marijuana.
    • alicia waid
      alicia waid on 06 Apr 13
       
      One of the many things that are still unknown is how marijuana might lead to psychosis.  There is a theory that marijuana interferes with brain development during adolescence and young adulthood, but this theory is yet to be determined.
    • alicia waid
      alicia waid on 06 Apr 13
       
      Although many things are still unknown about the relation between the adolescent brain and marijuana, one this is certain: As a teen, by smoking marijuana, you are increasing your vulnerability to psychotic thinking.
  • risk for later schizophrenia, psychosis
  • regular marijuana use increases the chance that a teenager will develop psychosis
  • increases the risk of developing schizophrenia
  • five times were twice as likely to have developed psychosis over the next 10 years
  • smoked marijuana at least
  • hasten the onset of psychosis by three years
  • already have a mother, father, or sibling with schizophrenia
  • most at risk are youths
  • some other psychotic disorde
  • one in five chance
  • even if they never smoke pot
  • one in 10 chance of developing the condition
  • doubles their risk
  • 7 in 1,000 chance
  • 14 in 1,000.
  • possible link between marijuana use and psychosis
  • smoked marijuana at least once were more than twice as likely to develop schizophrenia as those who had never smoked pot
  • marijuana use might lead to psychosis
  • cigarette smoking and lung cancer
  • marijuana and the brain
  • stimulates the brain and triggers other chemical reactions that contribute to the drug’s psychological and physical effects
  • six times as likely to develop schizophrenia as the nonsmokers
  • not clear
  • theory
  • marijuana may interfere with normal brain development during the teenage years
  • young adulthood.
  • increase a young person’s vulnerability to psychotic thinking
  • reward of a short-time high isn’t worth the long-term risk of psychosis or a disabling disorder like schizophrenia.
jordana levine

Blame the Brain for Typical Teenage Behavior - 0 views

www.netwellness.uc.edu/...teenagers.cfm

shared by jordana levine on 01 Feb 11 - No Cached
  • jordana levine on 01 Feb 11
     
    This articles explains how the teenage brain functions and develops and the ways that brain activity often manifests itself. It explains how teenagers rely primarily on the "amygdala" and the consequences of this fact. It also gives advice to parents on how to deal with their teenagers' irrational behaviour due to the stage that their brain is at.
Alex Weinstein

Parkinson's Disease Stages, Symptoms, Causes, and Prognosis by MedicineNet.com - 0 views

www.medicinenet.com/...article.htm

parkinson disease brain psychology

shared by Alex Weinstein on 07 Mar 11 - Cached
  • Parkinson's disease is the second most common neurodegenerative disorder and the most common movement disorder.
  • loss of muscle contro
  • live long productive lives
  • ...4 more annotations...
  • disabled much more quickly.
  • Most individuals who develop Parkinson's disease are 60 years of age or older
  • early-onset Parkinson's disease (onset between 21-40 years)
  • uvenile-onset Parkinson's disease (onset before age 21)
  • Alex Weinstein on 07 Mar 11
     
    This website has everything question i wanted to be answered and more.I learnt a lot from this site. Its very useful for my psychology project, and it really catches the importance of Parkinson's.
Daryl Bambic

The teenage brain | Science News for Students - 1 views

www.sciencenewsforstudents.org/...teenage-brain

brain teenage

shared by Daryl Bambic on 13 Jan 17 - No Cached
  • dopamine.
  • Dopamine levels in general peak during adolescence.
  • increased activity in the ventral striatum
  • ...27 more annotations...
  • prefrontal cortex’s ability to boss the brain increases with age.
  • reward system can outmuscle the master planner.
  • adolescent brain specifically evolved to respond to rewards so teens would leave behind the protection provided by their parents and start exploring their environment — a necessary step toward the independence they will need in adulthood.
    • Daryl Bambic
      Daryl Bambic on 03 Feb 17
       
      Evolutionary reward...the teen phase of development is what has pushed us forward with the new discoveries
  • So that’s why you have parents to act as your prefrontal cortex,” Frank jokes. Then, all too often, he says, “you reach adolescence and you don’t listen to your parents anymore.”
  • brain acts as the sculptor and chops away excess synapses. Scientists refer to this process as synaptic pruning.
    • Daryl Bambic
      Daryl Bambic on 03 Feb 17
       
      Great image of pruning as sculpting
  • If you have ever thought that the choices teenagers make are all about exploring and pushing limits, you are on to something
  • necessary phase in teen development
  • exploratory period.
  • Even laboratory mice experience a similar phase during their development.
  • Young mice that explore most tend to live longest
  • magnetic resonance imaging (MRI) scanner. The scanner relies on a powerful magnet and radio waves to create detailed images of the brains
  • Teens also can play games that require them to make choices,
  • observing and measuring which parts of the teens’ brains are most active
  • During the risk-taking and rewards-based tests, one region deep inside the brain shows more activity in adolescents than it does in children or adults, Crone says. This region, known as the ventral striatum, is often referred to as the “reward center”
  • Adolescents are particularly sensitive and responsive to influence by friends, desires and emotions, researchers say. It’s one of the hallmarks of this stage in life.
  • eel good” response helps explain why they often give in to impulsive desires.
  • to be shouting louder” between the ages of 13 and 17 than at any other time during human development.
  • prefrontal cortex, it’s the brain’s master planner.
  • brain is locked in a tug-of-war between the logical pull of the prefrontal cortex and the impulsive pull of the ventral striatum.
  • toward years of serious risk-taking
  • prefrontal cortex seems to lag in developing. It turns out this delay serves an important evolutionary function,
  • So it’s important that the master planner not be too rigid or restrictive during adolescence. Instead, it stays open to learning.
  • One of the processes involves axons, or fibers that connect nerve cells. From infancy, these fibers allow one nerve cell to talk to another. Throughout the teen years, fatty tissue starts to insulate the axons from interfering signals — it is a bit like the plastic that coats electrical cables.
  • In axons, the insulating tissue allows information to zip back and forth between brain cells much more quickly. It also helps build networks that link the prefrontal cortex with other brain regions, allowing them to work together more efficiently.
  • The second key process involves synapses. A synapse is like a dock between nerve cells. Nerve cells communicate by transmitting chemical and electrical signals. Those signals move through the synapses.
  • brain starts discarding many of these connections
  • So the brain strengthens the synapses it really needs and eliminates those that either slow things down or aren’t useful.
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