Midterm #1 Flashcards
What does incidence refer to?
Incidence is the rate of new cases of a disorder in a given time period ( e.g., Incidence rate of 2% if 2000 new cases occur in a population of 100000 in a 1 year period)
What does prevalence refer to?
Prevalence is the percentage of a population that have a disorder at any given time. (I.e. point prevalence, one year prevalence, lifetime prevalence)
Biopsychosocial model of psychopathology?
Biopsychosocial model: Psychopathology is determined by complex interactions between many biological and environmental variables.
What is a gene?
A gene is a section of DNA that codes for a particular function or structure.
I.e Lip size, eye colour etc.
What is a chromosome? How many from each parent?
A chromosome contains strands of deoxyribonucleic acid (DNA), which provides instructions on how to build the body and the brain.
Humans inherit 23 chromosomes from each parent
Underdeveloped brain?
Caused by genetic errors in building the brain.
Likely Mental health consequence: Intellectual deficit: a large part of your brain is involved in thinking and processing. If your brain ends up underdeveloped then a typical consequence is intellectual deficiency.
I.e.: Microcephaly: Individuals are born with very small heads, resulting in a small brain, which results in severe intellectual disability.
FASD- overexposure to alcohol in utero will also produce a smaller brain and this will be associated with intellectual underdevelopment and impairment.
Having a smaller brain than normal results in intellectual deficits
Consequence of underdeveloped brain = intellectual deficiency.
What happens when brain development is compromised in a *general way?
Increased impulsivity occurs. Impulsions are less inhibited so you see behavioural and emotional problems in people with underdeveloped brains.
Oversensitive brain?
The brain has over 1 billion neurons which communicate via a highly complex electrochemical system. This is a finely-tuned system where there is just enough communication and electrochemical transmission. There are a billion transmissions whenever you speak. However, if your brain is sensitive and too many firings happen too often, you could end up with a trillion transmissions.
*An oversensitive brain is too likely to fire.
Stimulant drugs increase the likelihood of firing, thereby increasing the risk of seizures in individuals with epilepsy
Mental health issue from an oversensitive brain? Epilepsy
Oversensitive peripheral nervous system?
Overactive nervous system. Causes tension.
Mental health condition: Anxiety
Personality: An overactive PNS causes shyness and introversion, more inhibition of behaviors.
Undersensitive PNS?
Less reactive nervous system. Individuals with an undersensitive PNS don’t get nervous often. Low anxiety. They are very bold and break rules often
Personality: Extroverted, Low Inhibition, No Anxiety
Can cause psychopathy and sociopathy. Psychopaths are unlikely to get sweaty palms due to their lack of nervousness.
- *Undersensitive nervous system is often associated with drug addiction.
- Undersensitive PNS increases likelihood of risk taking. , such as with drug experimentation *. Drug users and abusers may be thrill seekers, as they are more likely to experiment with drugs-> More likely to use them regularly -> More likely to become drug dependent etc.
Dysfunctional inhibitory systems (cortex)?
Dysfunction in inhibitory systems is associated with addictions. Addiction is an inability to inhibit something that you do., drug addiction, sex addiction etc.
Overactive limbic system ( emotional regulation)?
Uninhibited emotions. lash out more frequently, anger, engage in disruptive behaviours.
Underactive/Overactive reward systems pathway?
Can inherit an overactive or underactive reward systems pathway.
*An underactive reward system is the key component of ADHD. You must do much more in order to stimulate this reward centre and feel enjoyment, so this results in risky and thrill-seeking behaviours, experimentation, deviancy, breaking laws. * This is especially important in addictions. They must have much more intense stimulation to get the same level of enjoyment
Overactive reward system: You are able to find enjoyment in dry things. Gives a massive advantage because you can sustain your interest in dry things over other people. Cognitive perseverence.
Dysfunctional Hypothalamus?
sexuality, eating
Dysfunctional motor cortex?
If you inherit a motor deficit in the motor system of your brain, this can result in *Cerebral palsy.
Deficit or compromise in the motor cortex results in difficulty with fine motor movements or gross motor movements. This is very common and can occur genetically because the instructions are wrong or during birth if damage is done etc.
Dysfunctional Auditory Cortex?
Difficulties understanding speech.
Dysfunctional Parietal Cortex?
Difficulties associating symbols with words. Ie Dyslexia
Damage to the frontal lobe?
Dysfunction in planning ahead, inhibition, thinking
What environmental experiences can cause neurodevelopmental damage during gestation?
Mother’s nutrition: if the other is not eating enough, then the baby will be smaller, resulting in a smaller brain. In turn, having a smaller brain increases the likelihood of having emotional and intellectual problems.
Mother’s Age
Giving birth at an older age, past 30, increases the risk of the child having down syndrome, trisonomy 21. which is thre copis of the 21st chromosome. Greater age of the mother, it is more difficult for her to seperate the chromosomes
Lots of other trisomies, but they are often fatal.
Miscarriages are often due to the embryo not being viable due to genetic defect.
What is encephalitis? *Spell
Inflammation of the brain. Brain damage can result diectly from inflammation of the neurons, or from the swelling expansion, which results in cell death. Damage is diffuse throughout the brain.
What is meningitis? * Spell
Inflammation of the membrane surrounding the brain and spinal cord. Brain damage can result from the inflammation. Causes swelling, but there is no room for expansion, resulting in cell death.
What is the optimal age for mothers to have children for a decreased likelihood of problems in their offspring?
In their 20s
Any earlier: parents are still developing and their reproductive system is not fully matured.
If you give birth at an older age, ie 40s : Greater risk of mutation.*** Especially greater risk of down syndrome, trisomy 21. Three 21st chromosomes. Greater age of the mother results in less accurate separation of the chromosomes to be placed in the egg. Every cell in your body contains two pairs of chromosomes. 23 Chromosomes from each parent, which match up.
Drugs that can kill neurons (Neurotoxic?)
MDMA/Ecstasy- neurotoxic
Alcohol - decreased brain size
Stress increases cortisol adrenalin which alter normal metabolic function. They can impair certain areas of the brain.
What is one of the best protective factors for mental health problems?
Having friends and social support systems
What makes a good coping strategy?
A good coping strategy is something that has a problem solving orientation.
This results in less stress, less liklihood of the problem recoccuring, as well as a better idea of how to handle it is it does.