Psychology Chapter: Stress and Pain Responses
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Questions and Answers

What can exaggerate cortisol secretion and cement fear-based memories?

  • Adaptive responses to stress
  • Central sensitization (correct)
  • Episodic memory recall
  • Positive cognitive appraisals
  • Which of the following describes a maladaptive response to stress?

  • Rumination (correct)
  • Mindfulness
  • Cognitive reappraisal
  • Optimism
  • How does central sensitization affect pain signals?

  • It reduces their intensity before reaching the brain.
  • It amplifies pain signals at the spinal cord level. (correct)
  • It exclusively affects peripheral nerves.
  • It prevents pain signals from being sent to the brain.
  • What effect can prolonged or exaggerated stress responses have on the body?

    <p>Promotion of chronic, recurrent pain (B)</p> Signup and view all the answers

    What is a potential outcome of maladaptive cognitive appraisals to stressors?

    <p>Intensification of physiologic stress responses (D)</p> Signup and view all the answers

    Which cognitive strategy can potentially minimize cortisol secretion?

    <p>Cognitive reappraisal (B)</p> Signup and view all the answers

    Which factor can contribute to a sensitized physiological stress response?

    <p>Development of a heightened stress perception (A)</p> Signup and view all the answers

    What are nociceptive signals experienced without peripheral neuron stimulus called?

    <p>Central pain signals (D)</p> Signup and view all the answers

    What are the two main types of descending modulation in the CNS?

    <p>Descending and Ascending (B)</p> Signup and view all the answers

    Which brain structures are primarily involved in the descending modulation process?

    <p>Cortex and Amygdala (A), Midbrain and Brainstem (C)</p> Signup and view all the answers

    What is the role of endogenous opioids in the CNS?

    <p>To suppress sensory experience (A)</p> Signup and view all the answers

    Who was one of the first to comment on the phenomenon of decreased pain perception in wounded soldiers?

    <p>H.K. Beecher (B)</p> Signup and view all the answers

    What neurotransmitter is primarily involved in the descending modulation process, along with endogenous opioids?

    <p>Serotonin (5-HT) (A), Dopamine (B)</p> Signup and view all the answers

    What effect does the sensory experience serve in the CNS?

    <p>To bring attention to important matters (D)</p> Signup and view all the answers

    What is the function of the midbrain's periaqueductal gray area (PAG) in the modulation process?

    <p>To initiate the release of modulators (A)</p> Signup and view all the answers

    Which of the following substances is similar to THC and involved in descending modulation?

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

    What neurotransmitters do local inhibitory neurons primarily use?

    <p>GABA and glycine (D)</p> Signup and view all the answers

    Which factors can alter central modulation and affect sensory experience?

    <p>Mood states and traumatic history (A)</p> Signup and view all the answers

    How does the physiological stress response influence pain perception?

    <p>It elicits a secretion of catecholamines and enhances pain perception. (B)</p> Signup and view all the answers

    What is the role of cortisol in the context of anxiety and stress?

    <p>It mobilizes glucose reserves and modulates inflammation. (A)</p> Signup and view all the answers

    What is a consequence of central sensitization on neuron health and function?

    <p>Altered neuron health and function (A)</p> Signup and view all the answers

    What type of pain or sensation can result from aberrant nociception or failures in central modulation?

    <p>Chronic pain or other pathological sensations (D)</p> Signup and view all the answers

    How does anxiety impact neurochemical levels in the central nervous system?

    <p>It depletes serotonin, dopamine, and norepinephrine volumes. (A)</p> Signup and view all the answers

    Which statement best describes the relationship between depression and pain?

    <p>Depression depletes neurochemicals essential for pain modulation. (C)</p> Signup and view all the answers

    What effect does chronic anxiety have on the central modulation mechanisms?

    <p>It can render central modulation less effective. (A)</p> Signup and view all the answers

    Which of the following describes the effect of sympathetic nervous system activation on pain perception?

    <p>It enhances pain perception and increases suffering. (B)</p> Signup and view all the answers

    What role do placebo effects play in managing symptoms?

    <p>They enhance central modulation to suppress symptoms. (D)</p> Signup and view all the answers

    What psychological phenomenon is indicated by expressing emotional distress as physical symptoms?

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

    What role do endorphins and enkephalins play in the spinal cord?

    <p>They can produce effects by modulating pain sensation. (D)</p> Signup and view all the answers

    What effect do nocebo responses have in comparison to placebo responses?

    <p>They enhance symptoms unlike placebo effects. (C)</p> Signup and view all the answers

    Which neurochemical is NOT mentioned as being depleted by depression?

    <p>Epinephrine (B)</p> Signup and view all the answers

    What is a notable factor in the therapeutic effects of massage therapy?

    <p>It likely incorporates placebo components via the therapeutic relationship. (D)</p> Signup and view all the answers

    Which condition is NOT mentioned as a potential cause for damage to peripheral nerves?

    <p>Facial nerve paralysis (C)</p> Signup and view all the answers

    What physiological change is associated with lowered thresholds for firing of C fibers?

    <p>Hyperesthesia (B)</p> Signup and view all the answers

    Which one of the following statements is accurate regarding the treatment approaches for neuropathic pain?

    <p>Pain management may include a combination of medications and therapies. (C)</p> Signup and view all the answers

    Which symptom is NOT typically associated with neuropathic pain?

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

    What effect does immobilization by pain have on nociceptive input?

    <p>It decreases the gating of nociceptive input. (C)</p> Signup and view all the answers

    What consequence results from glutamate excitotoxic cell death of inhibitory neurons?

    <p>Increased electrical activity in the spinal cord. (C)</p> Signup and view all the answers

    Which of the following is NOT a factor that can worsen neuropathic pain?

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

    Which mechanism involves the proliferation of alpha adrenergic receptors?

    <p>Lowered threshold for firing of A delta fibers (D)</p> Signup and view all the answers

    What does anaesthesia refer to in sensory terms?

    <p>Absence of any sensation from stimuli (B)</p> Signup and view all the answers

    Which term describes diminished sensation where the response is less strong than expected?

    <p>Hypaesthesia (B)</p> Signup and view all the answers

    What characterizes hyperaesthesia?

    <p>Exaggerated sensation in response to stimuli (D)</p> Signup and view all the answers

    What sensation is described by the term paraesthesia?

    <p>Abnormal sensations like 'pins and needles' (B)</p> Signup and view all the answers

    Dysaesthesia is best defined as which of the following?

    <p>Painful abnormal sensations from innocuous stimuli (D)</p> Signup and view all the answers

    Allodynia is characterized by which of the following experiences?

    <p>Pain from a stimulus that would not normally cause pain (B)</p> Signup and view all the answers

    What is a common non-sensory stimulus that may lead to paraesthesia?

    <p>Reduced blood flow to a nerve (A)</p> Signup and view all the answers

    Which of the following best summarizes the relationship between dysaesthesia and paraesthesia?

    <p>Dysaesthesia is a painful type of paraesthesia. (D)</p> Signup and view all the answers

    Flashcards

    Central Modulation

    The process by which the brain regulates and modifies sensory input, particularly pain signals.

    Descending Modulation

    A type of central modulation that originates in the brain and travels down to the spinal cord.

    Beecher's Observation

    The phenomenon of significantly reduced pain perception, often observed in situations of intense focus or stress.

    Brain Regions Involved in Central Modulation

    The group of brain regions that play key roles in modulating pain signals, including the cortex, thalamus, insula, amygdala, and hypothalamus.

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    Endorphins and Enkephalins

    The brain's natural pain relievers, similar to morphine or heroin.

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    Dopamine

    A neurotransmitter involved in central modulation, known for its role in reward and motivation.

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    Periaqueductal Gray (PAG)

    A midbrain region that plays a crucial role in descending pain modulation.

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    Modulators of Pain Signals

    Neurotransmitters released from brainstem zones like the raphe nuclei that modulate pain signals in the spinal cord.

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    Central Sensitization

    A condition where the central nervous system (CNS) becomes hypersensitive to pain signals, leading to amplified pain perception.

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    1° Neuron

    The initial nerve pathway carrying pain signals from the body to the spinal cord.

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    2° Neuron

    The nerve pathway that transmits pain signals from the spinal cord to the brain.

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    Dorsal Horn

    The area in the spinal cord where 1° neurons synapse with 2° neurons.

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    Nociception

    The normal process of pain perception where pain signals are correctly interpreted by the brain.

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    Maladaptive Cognitive Appraisals

    Negative thoughts and beliefs about pain that worsen its experience.

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    Cortisol

    The stress hormone released in response to perceived threats, which can contribute to chronic pain.

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    Coping Mechanisms

    Strategies used to manage stress and reduce its impact on pain.

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    Anaesthesia

    Absence of any sensation. The stimulus does not produce any of the expected sensation. Anaesthesia can also be induced, for example by using a nerve-blocking agent in dental work.

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    Hypaesthesia

    Diminished sensation; the experience matches the nature of the stimulus, but is less strong than expected. Hypaesthesia is colloquially referred to as numbness.

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    Hyperaesthesia

    Heightened or exaggerated sensation; the experience accurately matches the stimulus, but produces an exaggerated or unexpectedly strong response.

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    Paraesthesia

    Abnormal sensations, e.g., ‘pins and needles’, ‘prickling’, ‘bugs crawling on skin’ – the sensation experienced does not correlate with the stimulus.

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    Dysaesthesia

    When a paraesthesic sensation is painful, it is called dysaesthesia, e.g.‘hot pokers’, ‘electric burning’ or ‘feels like it’s on fire’;

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    Allodynia

    Instead of the expected sensation, an innocuous stimulus (e.g. like a feather touch) results in pain, typically a “regular” sort of pain experience, e.g., achy or sharp.

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    How do endorphins and enkephalins inhibit pain signals?

    Endorphins and enkephalins directly inhibit the transmission of pain signals at the synapses between C and A-δ fibers and secondary spinothalamic tract neurons. They achieve this by 'closing the gate' by activating local inhibitory neurons that release GABA and glycine.

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    What can disrupt central modulation mechanisms?

    Central modulation mechanisms can be disrupted by various traumatic or pathological conditions, leading to aberrant nociception, altered CNS analysis, or a failure of central modulation, resulting in chronic pain.

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    How do mood states, traumatic experiences, and chronicity impact central modulation?

    The central modulation system's ability to regulate pain perception is heavily influenced by mood states, traumatic experiences, and chronic pain. These factors can alter the system's effectiveness.

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    How do anxiety, fear, stress, and distress influence pain perception?

    Anxiety, fear, stress, and distress can enhance pain perception and increase pain suffering. This is because anxiety promotes the activation of the sympathetic nervous system, which releases stress hormones like cortisol and adrenaline.

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    Neuropathic pain

    A condition where the body's pain signaling pathways become sensitized, leading to persistent and often severe pain that's not related to tissue damage.

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    How does the sympathetic nervous system contribute to enhanced pain perception during anxiety?

    The sympathetic nervous system's activation during anxiety releases stress hormones such as cortisol and adrenaline, which enhance pain perception and distress. This ultimately reduces the effectiveness of central modulation.

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    A delta fiber

    A nerve fiber responsible for transmitting sharp, localized pain.

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    What are the roles of cortisol in pain perception?

    Cortisol plays a crucial role in the body's stress response by mobilizing energy reserves and modulating inflammation. It can also contribute to the consolidation of fear-based memories, potentially exacerbating pain perception.

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    How does dysfunctional stress affect central modulation?

    Dysfunctional stress, especially when it becomes entrenched or accompanied by an anxiety disorder, can significantly compromise central modulation, making pain perception more intense and difficult to manage.

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    C fiber

    A nerve fiber responsible for transmitting dull, aching pain.

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    Why is understanding central modulation crucial for pain management?

    Central modulation is a complex process involving multiple neural pathways and neurochemicals. When disrupted, it can lead to various pain conditions, highlighting the need for a comprehensive understanding of its mechanisms.

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    Hypersensitivity

    The increased sensitivity of nerve fibers, leading to exaggerated responses to stimuli.

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    Ephaptic activation

    The phenomenon where nerve fibers can activate each other, contributing to the amplification of pain signals.

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    Inadequate descending pain control

    This refers to the central nervous system's inability to effectively regulate pain signals, leading to chronic pain.

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    Sprouting of C fibers in the spinal cord

    The expansion of nerve fiber branches within the spinal cord, further contributing to the amplification of pain signals.

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    Somatization

    A condition where mental or emotional distress is expressed as physical symptoms.

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    Interconnectedness of Anxiety, Central Sensitization, and Depression

    The interconnectedness of anxiety, central sensitization, and depression, often co-occurring in individuals.

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    Nocebo Effect

    A phenomenon where negative expectations or beliefs can trigger or worsen symptoms.

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    Placebo Effect

    The ability of the body to heal and restore itself through positive expectations and beliefs.

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    Damage and Disease in Pain Perception

    Any factor or condition that disrupts the normal functioning of the nervous system, contributing to pain perception difficulties.

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    Neurochemicals Involved in Mood and Pain Regulation

    Neurotransmitters involved in regulating mood, pain, and descending modulation.

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    Study Notes

    Central (Descending) Modulation

    • Modifiers of afferent transmission exist, locally inhibiting or gating signals from tissues to the brain.
    • Filtering in the thalamus further modifies these signals.
    • The central nervous system (CNS) also has descending modulation mechanisms.
    • This descending modulation is often discussed in the context of pain, but can also be applied to other sensory experiences to weaken or suppress them.
    • Understanding of these descending mechanisms is incomplete.
    • Beecher noted the frequent lack of pain in injured soldiers, suggesting a role beyond sensory experience.
    • Sensory experience focuses attention on crucial matters needing response or reflection.
    • Absence of importance or distraction weakens or eliminates sensory experience.
    • Brain regions like the cortex, thalamus, insula, amygdala, and hypothalamus are involved in central modulation. These regions release chemicals like endorphins and enkephalins.

    Descending Modulation Mechanisms

    • These mechanisms involve communication to midbrain and brain stem nuclei.
    • These nuclei release modulators from brainstem zones, including neurotransmitters like serotonin, norepinephrine, and endocannabinoids.
    • These modulators act on neurons in the dorsal horn.
    • They directly inhibit synapses where C and A-delta fibers transmit signals.
    • They activate local inhibitory neurons, which have a role in blocking signals.
    • Indirectly, they can inhibit the firing of secondary neurons.
    • These local neurons frequently use GABA and glycine.

    Central Modulation Problems

    • Modulation mechanisms are broad, influenced by numerous traumatic and pathological causes.
    • This means pain or sensations may result from aberrant nociception or modulation failure.
    • Mood states, mental health, trauma history, and chronic conditions can alter central modulation.

    Anxiety, Fear, Stress, Distress

    • Anxious individuals often experience more intense pain.
    • Factors like sympathetic nervous system stimulation are related to stress and anxiety-related pain perception.
    • The modulation mechanisms impacting anxiety may be compromised by numerous situational factors.

    Central Sensitization

    • Central sensitization involves normal sensory signals being amplified; the initial signals do not necessarily need to be strong for the pain experience to result.
    • Signals from sensory receptors on primary neurons are processed in the dorsal horn.
    • These signals are amplified as they move further to the brain.
    • Nociceptive signals are sometimes sent to regions of the central nervous system without peripheral stimulus.

    Neuropathic Pain

    • Neuropathic pain originates from sensory nerve damage or dysfunction.
    • This can be due to various factors, both peripheral (traumatic damage) and central.
    • Neuropathic pain often occurs with inflammation or injury.

    Complex Regional Pain Syndrome II/ Causalgia (CRPS II)

    • CRPS II is a symptom of peripheral nerve damage, often due to injuries to the median, sciatic, or certain spinal nerves.
    • This reflects damage/irritation to the sympathetic vasomotor neurons within the nerve causing shooting pain.
    • Intense burning pain is often accompanied by skin redness (erythema).

    Damage, Pathology

    • Sensory perception challenges are impacted by various factors influencing neural pathways, such as neuron loss, injury, or inflammation.
    • Sensory signals may be misinterpreted due to damaging factors such as ischemia or compression
    • Demyelinated areas or abnormal conduction pathways change signal interpretation and cause additional complications.
    • Sensory experience challenges can result from the brain interpreting abnormal signals or activating nerves without a stimulus.

    Nocebo and Placebo

    • Placebo and nocebo effects are factors in the experience of pain and discomfort.
    • There are considerable research interests into both placebo and nocebo in sensory perception.

    Clinical Terminology

    • Massage therapists must understand descriptive sensory terms and how they relate to various conditions.
    • Terms like anesthesia, hyperesthesia, hypoesthesia, and hyperalgesia are relevant concepts related to sensory experience.

    Paraesthesia, Dysaesthesia

    • Paraesthesia and dysaesthesia are types of abnormal sensory experiences/perceptions.
    • These typically do not correlate with or are not caused by stimulation; rather, they are often described as unusual and painful.

    Allodynia, Hyperalgesia, Hypalgesia

    • Allodynia is a condition where innocuous stimuli are perceived as painful.
    • Hyperalgesia is an increased response to normally painful stimuli, or a heightened awareness of the pain itself.
    • Hypalgesia signifies a decreased or weakened response to painful stimuli.

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    This quiz explores the complex interactions between stress and pain, focusing on how cortisol secretion and cognitive appraisals can affect our physical responses. Participants will assess their understanding of concepts like central sensitization, stress responses, and the role of endogenous opioids in pain modulation. It's an essential tool for anyone studying psychology or neuroscience!

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