Lecture 4: Chapter 5: Mood Disorders and Suicidality Flashcards
What are the 2 types of mood disorders in the DSM?
- Unipolar depressive disorders
- Bipolar disorders (include manic symptoms)
What is anhedonia?
The inability to experience pleasure and/or profound sadness
What are 3 types of physical symptoms for depressive disorders?
- Fatigue
- Low energy
- Physical aches/pains
What are 7 symptoms of Major Depressive disorder and how many criteria do you have to meet in order to get this diagnosis?
Meet at least 5 symptoms:
1. Sleeping too much/too little
2. Psychomotor retardation/agitation
3. Weight loss/gain
4. Loss of energy
5. Feelings of worthlessness or guilt
6. Difficult concentrating, thinking, decision making
7. Recurrent thoughts of death or suicide
Symptoms present nearly every day, most of the day for at least 2 weeks
What does it mean that major depressive disorder (MDD) is an episodic disorder?
Symptoms tend to be present for a period and then clear out
Major depressive episodes often recur
What are 6 symptoms of Persistent Depressive disorder? When do you get this diagnosis?
- Sleeping too much/too little
- Poor appetite/overeating
- Low energy
- Poor self-esteem
- Trouble concentrating/ decision making
- Feelings of hopelessness
At least 2 of the symptoms + depressed mood for most of the day more than half of the time for 2 years
What is a different name of persistent depressive disorder?
Dysthymia
What is the epidemiology of MDD?
MDD is very common and appears more often in women than in men and trice as often in poor people than wealthy people
How can you explain differences in prevalence of MDD in different countries?
It’s complex. It can be cultural, but it can also have to do with other factors, such as distance from the equator
How does the distance to the equator matter for mood disorders? Which disorder is more prevalent in more northern countries (Europe)?
Further away from equator means more seasonal changes. In the winter, humans have lower metabolism, which leads to higher rates of depression during winter
Seasonal affective disorder
How did the age of onset for MDD evolve over the last few years?
The age of onset becomes lower for each generation of people.
60 years ago: <5% experienced episode of MDD before age 20
Now: 10% experienced episod MDD before age 20
What can you say about the comorbidity of MDD and persistent depressive disorder?
15-30% of people diagnosed with MDD will have symptoms for over 2 years and then qualify for diagnosis of persistent depressive disorder
What are common comorbid disorders with MDD and persistent depressive disorders?
Anxiety disorders, substance-related disorders, sexual dysfunctions, personality disorders
When do gender differences in depression arise and what are 3 possible factors contributing to it?
Arises in adolescence
Factors:
1. Biological: fluctuations in hormones might increase stress reactivity in women
2. Social: girls more frequently exposed to sexual abuse and chronic stressors
3. Stress reactivity: self-critical attitudes about appearance, focus on gaining approval
How many people will approximately experience MDD during their lifetime?
Around 16%
MDD and persistent depressive disorder are both … as common among women as among men
Twice
What is the difference between mood and emotion? (4)
Mood:
1. Long duration
2. Not directed at smth
3. Mostly bias cognition
4. Angry, sad, happy etc.
Emotions:
1. Short
2. Directed toward smth
3. Bias cognition + immediate action
4. Basci: fear, anger, disgust, happiness
What are the 3 forms of bipolar disorders according to the DSM? How are they differentiated?
- Bipolar I
- Bipolar II
- Cyclothymic disorder
Differentiated by how severe and long-lasting the manic symptoms are
What is mania? Give at least 3 examples of symptoms. How long do they last?
A state of intense elation or irritability, along with abnormally increased activity and other symptoms.
E.g. people get louder, take more risks, have flight of ideas, anger outbursts, extreme self-confidence, no sleep, risky sexual activity
Symptoms last at least a week, require hospitalization or include psychosis
What is hypomania? What are symptoms of it? How long does it take?
A less extreme form of mania, often less damaging to the person and its surroundings
Clear changes in functioning, but no impairment of function. No psychotic symptoms
Last at least 4 days
What are symptoms for mania/hypomania? (8)
- Increased goal-directed activity
- Unusual talkativeness
- Flight of ideas, racing thoughts
- Decreased need for sleep
- Increased self esteem
- Distractibility
- Excessive involvement in risky activities
- Presen most of the day nearly every day
When is bipolar II disorder diagnosed?
When a person had at least one depressive episode and one hypomanic episode during their life
When is bipolar I disorder diagnosed?
When a person had at least one depressive and one manic episode in a lifetime
What is cyclothymia/cyclothymic disorder?
Chronic mood disorder, where the person has frequent but mild symptoms of depression, alternating with mild symptoms of mania
The symptoms aren’t as severe as bipolar I/II, but people close to clients typically notice ups and downs
What are 2 symptoms of cyclothymic disorders and how long does it have to be there to get that diagnosis?
- Numerous periods with hypomanic symptoms that don’t meet criteria for hypomanic episodes
- Numerous periods with depressive symptoms that don’t meet criteria for depressive episode
Symptoms for at least 2 years, present at least half the time and not clearing for more than 2 months at a time
What does it mean that mood disorders are very heterogenous?
People with the same diagnosis show very different symptoms
What is more common, MDD or bipolar disorders?
MDD
What is the prevalence of bipolar I, bipolar II and cyclothymia?
I: 1%
II: 0,4-2%
Cyclo: 4% (less known)
What is often the age of onset for people with bipolar disorders?
Half of the people report age ofonset before age 25. The age of onset of bipolar disorders are increasing in frequency for children and adolescents
What is the prevalence of suicide attempts among people with bipolar I disorder?
1 out of 4 –> bipolar disorder was the psychiatric condition with the highest rate of suicide
Which medication is most often used for people with bipolar disorder?
Lithium
How many episodes do people with bipolar I disorder experience on average?
4 or more episodes
What is the influence of genetics on mood disorders (depression)? What is the heritability number for depression and for bipolar disorders?
Depression: H=0,37
Bipolar: H = 0,93
What is a genetic explanation of the variation in symptoms in mood disorders?
It shows that mood disorders are probably caused by a whole set of varying genes and not just a single gene
What can you say about the activation of the striatum in response to rewards in depression and bipolar disorders?
Depression: diminished activation
Bipolar: elevated activation
What can you say about the genetic contribution in MDD and bipolar disorders?
MDD: moderate
Bipolar: high
What can you say about the cortisol awakening response in MDD and bipolar disorders?
MDD: elevated response
Bipolar: elevated among those in depressive episodes
What is the function of dopamine in the reward system?
More dopamine guides pleasure, motivation and energy in the context of opportunities to obtain rewards
This is lower in depression and high in mania
Which 3 neurotransmitters are thought to play a role in mood disorders?
- Norepinephrine
- Dopamine
- Serotonin
Mood improvements don’t immediately happen after intake of neurotransmitters in the form of antidepressants. To what hypothesis did that lead?
It lead to the idea that mood disorders are related to the sensitivity of postsynaptic receptors that respond to the presence of neurotransmitters in the synaptic cleft
What is the consequence of administering dopamine to people with bipolar disorder?
It can evoke a manic episode
How do tricyclic antidepressants work?
It prevents the reuptake of neurotransmitters from presynaptic neuron, so that the postsynaptic neuron gets more neurotransmitters
What can you say about the activity of the amygdala in people with MDD? Is it a consequence of depression?
More active in MDD clients: it helps people to grasp how great the emotional importance of a stimuli is
It’s not a consequence of MDD, it’s more like a vulnerability to get depression
What can you say about the activation of the anterior cingulate, the prefrontal cortex and the hippocampus in depression and in mania when viewing negative stimuli? What are these regions involved in?
Both:
- Anterior cingulate: elevated
- PFC: diminished
- Hippocampus: diminished
Regions are involved in emotion regulation