Somatosensory Pathways and Thalamus Quiz
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Questions and Answers

Which laminae are heavily involved in the mediation of information associated with nociception?

  • Lamina 3 & 4
  • Lamina 1 & 2 (correct)
  • Lamina 2 & 3
  • Lamina 5 & 6
  • Which neuropeptide is primarily released by first-order C fibers at the synaptic junction?

  • Serotonin
  • Substance P (correct)
  • Glutamate
  • Dopamine
  • Which tract is responsible for providing our immediate experience of pain due to its quicker fibers with heavier myelination?

  • Spinoreticular Tract (correct)
  • Archispinothalamic Tract
  • Spinomesencephalic Tract
  • Paleospinothalamic Tract
  • What is the first step in the process of nociception?

    <p>Transduction</p> Signup and view all the answers

    Which structure carries information on pain, temperature, and crude touch to terminal synapses in the brain?

    <p>Spinothalamic tract</p> Signup and view all the answers

    What is the role of interneurons in the process of nociception?

    <p>Facilitating or inhibiting nociceception at the PNS or CNS</p> Signup and view all the answers

    What is the primary function of the Reticular Formation RN and Raphe Nuclei PVG in the context of nociception?

    <p>Inhibiting action potentials associated with noxious stimuli</p> Signup and view all the answers

    Which structure is primarily associated with visceral, emotional, and autonomic modulation in the context of nociception?

    <p>Periaqueductal Gray (PAG) and Tectum</p> Signup and view all the answers

    Why is visceral nociception experienced as a diffuse and non-descript sensation of pain?

    <p>Due to the involvement of archi-paleo processing in the dorsal horn</p> Signup and view all the answers

    Which tract is responsible for transmitting nociceptive and discriminatory information from the neospinothalamic tract to the sensory cortex?

    <p>Archispinothalamic tract</p> Signup and view all the answers

    What is the function of the Gate Control Theory in pain modulation?

    <p>To acutely reduce the magnitude of nociceptive action potential before reaching the brain</p> Signup and view all the answers

    Which structures are heavily involved in mediating descending inhibition system and nociception at the PAG?

    <p>Paleo tract, limbic nuclei, archispinothalamic tract</p> Signup and view all the answers

    What is one of the functions of the periaqueductal gray matter?

    <p>Modulating and propagating pain</p> Signup and view all the answers

    Which neurotransmitters are released at the dorsal horn to inhibit primary and second order neurons?

    <p>Norepinephrine and serotonin</p> Signup and view all the answers

    What is the primary mechanism of central sensitization?

    <p>Homosynaptic potentiation</p> Signup and view all the answers

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