Plasticity and hormonal influence of the brain
25 important questions on Plasticity and hormonal influence of the brain
What 3 kind of signal circuits are 'tuned' in a baby before it is born?
- Visual circuits: systematic moving patterns
- Auditory circuits: child has preference for native language immediately after being born
When something in the motor, visual or auditory circuit is not right after the child is born, what is important to take into account for the treatment?
What shows that nurture in the development of visual, auditory and motor circuits is very important?
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From a phylogenetic point of view, what parts of the brain mature first?
To what extent is the brain plastic, and how does it make new connections and pathways?
What does the brain do after damage or injury?
When in your life is the most 'optimal' time to get brain damage, as regards to brain plasticity?
What are possible causes of brain damage?
- Tumor
- Infection
- Toxic substances
- Degenerative disease
- Cardiac arrest
What are two different types of strokes, and what kind of problems do they cause?
- Ischemia: blood clot/obstruction of an artery, so that neurons lose their oxygen and glucose supply
- Hemorrhage: ruptured artery, which causes neurons to have an excess of calcium, oxygen, and other nutrients
To what extent can people that suffer from brain damage recover?
What technique is often used to help the brain recover, and what are the side effects of it?
- there can be 'damage', for example depression and personality changes
Why is partial brain damage informative?
What causes the male and female brain to become different in fetal development?
What is the sexually dimorphic nucleus?
What two factors cause males and females to exhibit sex differences?
- They secrete different hormones, AND
- these hormones are acting on a sexually dimorphic brain
Sex hormones during fetal development are critical for the development of a sexually dimorphic brain, but what do sex hormones postnatally effect?
How does testosterone in males cause the development of a 'male' brain?
- Testosterone is converted into estradiol and DHT
- Estradiol masculizes the brain
What are the two hypotheses on the role of estrogens in female brain development?
- Hypothesis 0: Alpha-fetoprotein transports estrogen to specific sites in the brain where it is involved in processes (feminization?)
- Hypothesis 1: Alpha-fetoprotein protects estrogens from travelling into the brain (because estrogens cause masculinization)
Which hypothesis is experimentally proven to be correct?
What is the postnatal role of estradiol in the female brain?
What is the function of the Medial preoptic area (MPA) in males?
Which site in the brain is also important in male sexual behaviour, and how does this differ between males and females?
- is around 2.5x larger in males
What is the function of bNST?
According to recent studies, what is the most important factor in gender identity?
Besides these hormones, what are three things that can play a major role in behavioural differences between males and females?
- Confidence
- Cultural differences
- Education
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