L27 - 29 - NS Disorders Flashcards
Four Categories of NS Disorders
1) Mental diseases - if you can’t see anything wrong, attributed to mental state, functional (the subject of psychiatry without an organic cause) (software issue)
2) Neurological disorders - pathological condition in tissue, organic disorder (the subject of neurology) (hardware issue)
3) Learning and developmental disabilities
4) Substance abuse disorders
Learning and developmental disabilities
Includes functional limitations that manifest in infancy or childhood as a result of disorders of or injuries to the developing NS
Males or females have higher rates of ADHD, autism and substance use disorders?
Males
Males or females have higher rates of major depressive disorder, most anxiety disorders and eating disorders?
Females
Prior to any schizophrenic psychotic episodes people with it may exhibit prodromal (period between appearance of symptoms and full development) signs such as? Why are they known as negative symptoms?
- Social withdrawal
- Neglect of personal hygiene
- Odd ideas and behaviours
- Flattened affect and paucity of speech
- Negative symptoms - theses signs are an absence of normal actions
Schizophrenic non-psychotic signs may include
- Tendencies to become overloaded with info
- Difficulty in crowed rooms or when lots of people are talking
- Easily distracted
- Periods of great mental activity, creativity and excitement
Acute psychotic episodes are charactered by? Commonly auditory or visual?
Delusions of paranoia, grandiosity (extremely narcissistic - believing you are really important), spiritual or supernatural experiences. Auditory hallucinations are more common.
*Patients also experience the feeling that they are being controlled by external forces and loss of insight
Does schizophrenia have a genetic component to it?
Yes - If you are identical twins, and one has it, the other has a 48% chance of having it too.
*The more related you are to someone that has it, the more likely you will have it
Schizophrenia - what is a sign in the brain structures that indicate the presence of it?
Enlarged ventricles and loss of excitatory synapses, not enough loss of inhibitory synapses
*There is also enlarged ventricles in huntingtons
What antagonists can be used in treatment of schizophrenia?
Dopamine D2 receptors antagonists
Schizophrenia - What are the problems with the dopamine hypothesis?
1) Long duration before relief of symptoms
Dopamine antagonists can be shown to bind to receptors a short time after administration, but relieve of symptoms takes several weeks (as with antidepressants).
2) PCP (angel dust) acts on glutamate receptors instead Paranoid delusions and hallucinations that control the person) but it acts on a subclass of glutamate receptors not dopamine receptors.
3) Some people don’t respond to D2 blockers, but to drugs that show broad monoamine antagonism.
NEUROLOGICAL DISEASE: ALZHEIMER’S DISEASE – what is it? What is it characterized by?
Form of dementia (deterioration of intellectual function and other cognitive skills). Characterized by deposition of amyloid protein (leading to aggregation of tau protein, a microtubule stabilizer, hence cell doesn’t function well because of the neurofibularly tangles formed-> leads to cell death) and the disruption of the neuronal cytoskeleton
*Amyloid plaque and neurofibularly tangles prevalent in parietal, occipital and medial temporal region
NEUROLOGICAL DISEASE: Epilepsy – what is it? What is it characterised by?
Common brain disorder characterized by two or more unprovoked seizures (affects 1% of population). It is more a symptom of a disease than a disease itself. Seizures are discrete events caused by transient, hyper-synchronous, abnormal neuronal activity.
Grand Mal Seizure
A generalized tonic-clonic seizure — features a loss of consciousness and violent muscle contractions. It’s the type of seizure most people picture when they think about seizures in general.
Seizures may occur in close temporal association with _, _ or _.
Acute stroke, sepsis or alcohol withdrawal
*Most cases have no immediate identifiable cause