Dorsal Lemniscal Tract Pathway Quiz
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Questions and Answers

What is the primary aim of the sensory examination?

  • To test the integrity of the sensory pathway (correct)
  • To map the dermatomes of the body
  • To determine the level of spinal cord injury
  • To test the integrity of the motor pathway
  • Which of the following is not a step in determining the location of a lesion in the sensory pathway?

  • Determining the extent of sensory loss
  • Determining the different pathways involved
  • Determining the nature of sensory loss
  • Determining the motor function (correct)
  • What is the first order neuron in the anterolateral spinothalamic tract pathway?

  • Cell body in the dorsal root ganglion (correct)
  • Cell body in the dorsal horn
  • Axons that cross to the opposite side
  • Cell body in the thalamus
  • Where do the axons of the second order neuron in the anterolateral spinothalamic tract pathway project?

    <p>To the contralateral thalamus</p> Signup and view all the answers

    What is the function of the third order neuron in the anterolateral spinothalamic tract pathway?

    <p>To receive input from the second order neuron and project to the somatic sensory area</p> Signup and view all the answers

    What is the purpose of the dermatome map?

    <p>To determine the level of spinal cord injury</p> Signup and view all the answers

    Where do the first order neurons of the dorsal-lemniscal tract pathway ascend to reach in the lower medulla oblongata?

    <p>Cuneate and gracile nuclei</p> Signup and view all the answers

    What happens when there is a lesion in the peripheral nerves along the dorsal-lemniscal tract pathway?

    <p>Loss of all sensations in the area supplied by the nerve</p> Signup and view all the answers

    In the dorsal-lemniscal tract pathway, where does the second order neuron's cell body reside?

    <p>Cuneate and gracile nuclei</p> Signup and view all the answers

    What is the main consequence of lesions in the spinal roots along the dorsal-lemniscal tract pathway?

    <p>Loss of all sensations in the corresponding dermatome</p> Signup and view all the answers

    Which area is directly affected by lesions in the somatic sensory area along the dorsal-lemniscal tract pathway?

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

    What type of sensory loss would be expected from lesions of the tracts along the spinal cord in the dorsal-lemniscal tract pathway?

    <p>Depends on the specific affected tract</p> Signup and view all the answers

    Which receptor is responsible for the sense of position?

    <p>Muscle spindles and Golgi tendon organs</p> Signup and view all the answers

    Which afferent nerve fibers carry information about vibration sense?

    <p>A beta fibers</p> Signup and view all the answers

    Which tract is involved in carrying information about position sense and vibration sense?

    <p>Dorsal column tract</p> Signup and view all the answers

    Which receptor is responsible for detecting lower frequency vibrations?

    <p>Meissner corpuscles</p> Signup and view all the answers

    Which of the following receptors is responsible for the sense of weight or pressure?

    <p>Merkel's discs</p> Signup and view all the answers

    Which of the following tests is used to assess the sense of position?

    <p>Holding the distal joint of a finger or toe and moving it slightly</p> Signup and view all the answers

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