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

What is the purpose of the dermatome map?

<p>To determine the level of spinal cord injury (B)</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 (D)</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 (A)</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 (D)</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 (B)</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 (A)</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 (D)</p> Signup and view all the answers

Which receptor is responsible for the sense of position?

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

Which afferent nerve fibers carry information about vibration sense?

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

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

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

Which receptor is responsible for detecting lower frequency vibrations?

<p>Meissner corpuscles (D)</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 (A)</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 (B)</p> Signup and view all the answers

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