Sensational Somatosensory System Quiz
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Questions and Answers

Which type of receptor functions over a broad range of temperatures with some overlap in the moderate temperature range?

  • Warm receptors (correct)
  • Mechanoreceptors
  • Cold receptors
  • Polymodal nociceptors
  • What is the basis for the reduced threshold for pain, known as hyperalgesia?

  • Local edema
  • Redness of the skin
  • Release of substances sensitizing the nociceptors to stimuli (correct)
  • Blood vessel permeability
  • Which type of pain is poorly localized and characterized as aching, burning, or throbbing?

  • Referred pain
  • Slow pain (correct)
  • Polymodal nociceptor pain
  • Fast pain
  • What is the phenomenon that explains why people describe the taste of chili peppers as 'hot'?

    <p>Activation of transient receptor potential (TRP) channels by capsaicin</p> Signup and view all the answers

    Which type of nociceptor is supplied by myelinated A-delta afferent nerve fibers and responds to mechanical stimuli such as sharp, pricking pain?

    <p>Thermal or mechanical nociceptors (TRPV or TRPM8 channels)</p> Signup and view all the answers

    What type of pain is carried on C fibers and is characterized as aching, burning, or throbbing pain that is poorly localized?

    <p>Slow pain</p> Signup and view all the answers

    What is the phenomenon that gives a cold sensation and involves the activation of TRPM8 channels by compounds like menthol?

    <p>Transduction of cold temperatures</p> Signup and view all the answers

    What type of nociceptor is supplied by unmyelinated C fibers and responds to high-intensity mechanical or chemical stimuli and hot and cold stimuli?

    <p>Polymodal nociceptors</p> Signup and view all the answers

    What type of pain is carried on A delta, group II, and group III fibers, has a rapid onset and offset, and is precisely localized?

    <p>Fast pain</p> Signup and view all the answers

    What type of pain is of visceral origin that is misperceived as pain arising from a somatic location?

    <p>Referred pain</p> Signup and view all the answers

    What is the phenomenon where pain is misperceived as arising from a somatic location according to the dermatomal rule?

    <p>Referred pain</p> Signup and view all the answers

    What is the name of the map of the body that is called the somatosensory homunculus?

    <p>Somatosensory homunculus</p> Signup and view all the answers

    Which type of information is processed by the somatosensory system?

    <p>Touch, position, pain, and temperature</p> Signup and view all the answers

    Which type of information is processed by the dorsal column system?

    <p>Fine touch, pressure, two-point discrimination, and vibration</p> Signup and view all the answers

    Which type of nerve fibers are mainly found in the anterolateral system (Spinothalamic pathway)?

    <p>Group III and group IV fibers</p> Signup and view all the answers

    Where do the axons of the second-order neuron in the anterolateral system (Spinothalamic pathway) cross the midline?

    <p>In the spinal cord</p> Signup and view all the answers

    Where is the third-order neuron located in the somatosensory pathway?

    <p>In the thalamus</p> Signup and view all the answers

    What does the somatotopic arrangement in the thalamus mean?

    <p>It means that somatosensory information from one side of the body is received in the contralateral thalamus</p> Signup and view all the answers

    Where is the fourth-order neuron located in the somatosensory pathway?

    <p>In the somatosensory cortex</p> Signup and view all the answers

    What type of representation does the somatosensory cortex have?

    <p>Somatotopic representation</p> Signup and view all the answers

    Which type of information is mainly processed by the dorsal column system?

    <p>Fine touch and pressure</p> Signup and view all the answers

    Where do the axons of the second-order neuron in the dorsal column system cross the midline?

    <p>In the brain stem</p> Signup and view all the answers

    What is the function of the fourth-order neuron in the somatosensory pathway?

    <p>Located in the somatosensory cortex and integrates complex information</p> Signup and view all the answers

    What type of information is processed by the anterolateral system (Spinothalamic pathway)?

    <p>Pain, temperature, and light touch</p> Signup and view all the answers

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