Antidepressants and Stress Impact Quiz
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Questions and Answers

What role does chronic stress play in the development of depression?

  • It increases neurogenesis in the brain.
  • It solely influences emotional responses without affecting neurobiology.
  • It reduces neurogenesis and damages neurons in specific brain regions. (correct)
  • It enhances memory and attention functions.
  • How do antidepressants contribute to neurogenesis in the brain?

  • They enhance the rapid development of previously damaged neurons.
  • They immediately restore cognitive functions.
  • They act only on the emotional symptoms of depression without neurobiological impact.
  • They promote neurogenesis slowly, correlating with their delayed effects. (correct)
  • What percentage of individuals with depression exhibit abnormal stress responses?

  • 90%
  • 25%
  • 75%
  • 50% (correct)
  • What is a common side effect associated with the use of tricyclic antidepressants (TCAs)?

    <p>Cognitive impairments (C)</p> Signup and view all the answers

    What is a significant characteristic of antidepressants concerning neuronal health?

    <p>They promote the stability and health of newly formed neurons while protecting existing neurons. (B)</p> Signup and view all the answers

    What is one way that stress impacts the hippocampus and frontal cortex?

    <p>It leads to structural damage and reduces neurogenesis. (A)</p> Signup and view all the answers

    Which of the following best describes the mechanism of action of monoamine oxidase inhibitors (MAOIs)?

    <p>Inhibit MAO enzymes that degrade neurotransmitters (D)</p> Signup and view all the answers

    What distinguishes reversible MAOIs from irreversible MAOIs?

    <p>They have a safer profile and transient inhibition of MAO (D)</p> Signup and view all the answers

    Which therapeutic use is NOT typically associated with first-generation antidepressants?

    <p>Generalized anxiety disorder (A)</p> Signup and view all the answers

    What dietary restriction is advised for patients taking MAOIs?

    <p>Avoiding tyramine-rich foods (D)</p> Signup and view all the answers

    Which class of antidepressants primarily blocks the reuptake of serotonin?

    <p>Selective Serotonin Reuptake Inhibitors (D)</p> Signup and view all the answers

    What is a significant risk associated with Paroxetine (Paxil)?

    <p>Serotonin syndrome (A)</p> Signup and view all the answers

    Which antidepressant is known for being effective in smoking cessation without causing sexual dysfunction?

    <p>Bupropion (Wellbutrin) (D)</p> Signup and view all the answers

    What is the typical duration for symptoms of serotonin syndrome to resolve after discontinuation of the offending drug?

    <p>24-48 hours (B)</p> Signup and view all the answers

    What percentage of patients experience SSRI Discontinuation Syndrome after abruptly stopping SSRIs?

    <p>50-60% (D)</p> Signup and view all the answers

    What is a significant risk associated with the use of 5-HT2 antagonists like Nefazodone?

    <p>Liver failure (D)</p> Signup and view all the answers

    Which antidepressant is classified as a Specific Noradrenergic and Specific Serotonergic Antidepressant (NaSSA)?

    <p>Mirtazapine (C)</p> Signup and view all the answers

    What is a potential benefit of using Mirtazapine compared to traditional antidepressants?

    <p>Decreased sexual dysfunction (A)</p> Signup and view all the answers

    Which of the following combinations may provide enhanced antidepressant action?

    <p>Olanzapine + Fluoxetine (C)</p> Signup and view all the answers

    What is the relationship between folate and Major Depressive Disorder (MDD)?

    <p>Low folate levels are linked to MDD. (C)</p> Signup and view all the answers

    What is Major Depressive Disorder (MDD) commonly known to be?

    <p>A chronic, recurring, and potentially life-threatening illness (C)</p> Signup and view all the answers

    Which neurotransmitters are primarily associated with the Monoamine Hypothesis in relation to depression?

    <p>Serotonin, norepinephrine, and dopamine (A)</p> Signup and view all the answers

    What is a common criticism of the Monoamine Hypothesis?

    <p>It lacks consistent findings on neurotransmitter levels (B)</p> Signup and view all the answers

    What is the role of neurogenesis in the adult brain according to the neurogenic theory?

    <p>It is essential for producing new neurons throughout life (C)</p> Signup and view all the answers

    Which statement accurately reflects the relationship between anxiety and depression?

    <p>Anxiety can be a comorbid condition that may require antidepressant treatment (C)</p> Signup and view all the answers

    What primary treatment focus should be prioritized in managing depression?

    <p>Addressing both neurogenesis and neural repair (C)</p> Signup and view all the answers

    What is a key advantage of antidepressants over benzodiazepines?

    <p>Less risk of dependence and abuse (D)</p> Signup and view all the answers

    Which class of antidepressants blocks the presynaptic reuptake of serotonin and norepinephrine?

    <p>Tricyclic Antidepressants (TCAs) (D)</p> Signup and view all the answers

    Which mechanism characterizes the action of Monoamine Oxidase Inhibitors (MAOIs)?

    <p>Inhibiting the MAO enzyme (C)</p> Signup and view all the answers

    What significant shift was observed with the introduction of Selective Serotonin Reuptake Inhibitors (SSRIs)?

    <p>Fewer instances of overdose (A)</p> Signup and view all the answers

    Flashcards

    Hippocampal Neurogenesis

    The process of generating new neurons in the hippocampus, a brain region crucial for memory and learning.

    Corticosterone

    A stress hormone that can have negative effects on the brain, particularly in the hippocampus.

    Antidepressant Action

    Antidepressants stimulate the growth of new neurons in the hippocampus, helping to repair damage caused by stress and depression.

    Stress and Depression

    Chronic stress can lead to reduced neurogenesis and damage to existing neurons, contributing to the development of depression.

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    Therapeutic Delay

    The time it takes for antidepressants to work fully reflects the time required for new neurons to grow and integrate into brain circuits.

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    SSRI Mechanism

    SSRIs block the reuptake of serotonin in the synapse, increasing its availability.

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    SSRI Therapeutic Uses

    SSRIs are used to treat major depressive disorder, dysthymia, anxiety disorders, obsessive-compulsive disorder (OCD), and post-traumatic stress disorder (PTSD).

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    Serotonin Syndrome

    A potentially life-threatening condition caused by excessive serotonin activity, leading to symptoms like agitation, confusion, and muscle rigidity.

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    NDRI (Bupropion)

    Bupropion is an antidepressant that increases norepinephrine and dopamine levels. It's known to be effective in smoking cessation and has less sexual side effects.

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    SNRI (Venlafaxine, Duloxetine)

    SNRIs increase both serotonin and norepinephrine levels. They are effective for treating depression and anxiety.

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    Major Depressive Disorder (MDD)

    A chronic, recurring mental illness that severely impacts quality of life, potentially leading to suicidal thoughts.

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    Monoamine Hypothesis

    The theory that depression is linked to a deficiency of serotonin, norepinephrine, and dopamine in the brain.

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    Neurogenesis

    The process of creating new neurons within the brain, primarily in the hippocampus and frontal cortex.

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    Hippocampus

    A brain region involved in learning, memory, and emotional regulation. Its function is impaired in depression.

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    Neuronal Repair and Remodeling

    Existing neurons have the ability to repair themselves or restructure their connections, essential for brain health and adaptation.

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    Depression: Chemical Imbalance?

    Depression is not simply caused by a chemical imbalance, but by complex brain changes affecting structure and function. This involves more than just neurotransmitters.

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    Treatment Goal for Depression?

    Antidepressant treatment aims to promote neurogenesis (new brain cell growth) and neural repair, beyond just balancing neurotransmitters, to address the underlying brain changes.

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    Antidepressants: First Use?

    Antidepressants were initially developed to treat depression in the 1960s, then expanded to treat other conditions like anxiety, chronic pain, and panic attacks.

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    How do Tricyclic Antidepressants (TCAs) work?

    TCAs, characterized by their three-ring molecular structure, block the reuptake of serotonin (5-HT) and norepinephrine in the brain, leading to increased levels of these neurotransmitters.

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    What do MAOIs do?

    MAOIs inhibit the Monoamine Oxidase (MAO) enzyme, which breaks down neurotransmitters. This leads to higher levels of norepinephrine, dopamine, and serotonin.

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    Nefazodone

    An antidepressant that reduces insomnia-related depression. It is a 5-HT2 antagonist, but was removed from the market due to liver failure risks.

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    Mirtazapine (Remeron)

    An antidepressant that belongs to the NaSSAs class. It blocks certain receptors to reduce anxiety, insomnia, and sexual dysfunction.

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    Modafinil (Provigil)

    This drug isn't a stimulant, but it's a 'Pro-Vigil' for those who are tired

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    Lamotrigine (Lamictal)

    An anticonvulsant and mood stabilizer. Effective for bipolar depression and treatment-resistant OCD.

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    Ketamine

    A glutaminergic antagonist that may have antidepressant effects. Its ability to reverse synaptic and behavioral symptoms is still debated.

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    TCA Mechanism

    Tricyclic antidepressants (TCAs) work by preventing the reabsorption of serotonin and norepinephrine, which increases their levels in the brain. They also block certain receptors causing effects like drowsiness and dry mouth.

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    MAOIs: Main Effects

    Monoamine oxidase inhibitors (MAOIs) block the breakdown of neurotransmitters, increasing levels of serotonin, norepinephrine, and dopamine.

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    MAOIs: Irreversible vs. Reversible

    Irreversible MAOIs permanently inhibit enzymes, lasting longer and requiring a longer time to resume normal function. Reversible MAOIs temporarily block enzymes, resulting in shorter-lasting effects and a quicker return to normal enzyme activity.

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    MAOIs: Dietary Restrictions

    MAOIs require dietary restrictions to avoid hypertensive crisis, a dangerous increase in blood pressure. This is due to consuming foods high in tyramine, an amino acid found in aged cheese, wine, and other fermented foods.

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    What are SNRIs?

    Serotonin/Norepinephrine Reuptake Inhibitors (SNRIs) are a type of antidepressant that increase levels of both serotonin and norepinephrine in the brain.

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