Dorsal Lemniscal Tract Pathway Quiz

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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?

To the contralateral thalamus Signup and view all the answers

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

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

What is the purpose of the dermatome map?

To determine the level of spinal cord injury 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?

Cuneate and gracile nuclei Signup and view all the answers

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

Loss of all sensations in the area supplied by the nerve Signup and view all the answers

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

Cuneate and gracile nuclei Signup and view all the answers

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

Loss of all sensations in the corresponding dermatome Signup and view all the answers

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

Thalamus 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?

Depends on the specific affected tract Signup and view all the answers

Which receptor is responsible for the sense of position?

Muscle spindles and Golgi tendon organs Signup and view all the answers

Which afferent nerve fibers carry information about vibration sense?

A beta fibers Signup and view all the answers

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

Dorsal column tract Signup and view all the answers

Which receptor is responsible for detecting lower frequency vibrations?

Meissner corpuscles Signup and view all the answers

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

Merkel's discs Signup and view all the answers

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

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