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Questions and Answers
Where do afferent fibers travel into the cord?
Where do afferent fibers travel into the cord?
Which type of fibers are found in the lateral division of the dorsal rootlets?
Which type of fibers are found in the lateral division of the dorsal rootlets?
What type of information do ascending tracts convey?
What type of information do ascending tracts convey?
Where do first order cell bodies of the Dorsal Column - Medial Lemniscus tract reside?
Where do first order cell bodies of the Dorsal Column - Medial Lemniscus tract reside?
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Where do the ipsilateral fibers of the Dorsal Column - Medial Lemniscus tract ascend?
Where do the ipsilateral fibers of the Dorsal Column - Medial Lemniscus tract ascend?
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Where do the contralateral fibers of the Dorsal Column - Medial Lemniscus tract cross?
Where do the contralateral fibers of the Dorsal Column - Medial Lemniscus tract cross?
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What type of information is conveyed by the Dorsal Column - Medial Lemniscus tract?
What type of information is conveyed by the Dorsal Column - Medial Lemniscus tract?
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Where do the axons of spinal nerves S5-T7 ascend in the spinal cord?
Where do the axons of spinal nerves S5-T7 ascend in the spinal cord?
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Where are the 2nd order cell bodies located for the axons of spinal nerves T6-C1?
Where are the 2nd order cell bodies located for the axons of spinal nerves T6-C1?
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Which system conveys pain and temperature, with predominantly crossed A-delta and C fibers located in the ventral white commissure?
Which system conveys pain and temperature, with predominantly crossed A-delta and C fibers located in the ventral white commissure?
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Which tract within the anterolateral system conveys dull, achy pain?
Which tract within the anterolateral system conveys dull, achy pain?
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Where do the axons of the neospinothalamic pathway project to for integration of sensory inputs and emotional processing of pain?
Where do the axons of the neospinothalamic pathway project to for integration of sensory inputs and emotional processing of pain?
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Which pathway produces elementary aspects such as autonomic activation, escape responses, arousal, and fear, with thalamic nuclei projecting to the limbic system?
Which pathway produces elementary aspects such as autonomic activation, escape responses, arousal, and fear, with thalamic nuclei projecting to the limbic system?
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Where is the major area for processing the emotional component of pain located, connected with various other areas for pain modulation?
Where is the major area for processing the emotional component of pain located, connected with various other areas for pain modulation?
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Where does modulation of pain occur using interneurons in the spinal cord and supraspinal pathways?
Where does modulation of pain occur using interneurons in the spinal cord and supraspinal pathways?
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Which tracts convey unconscious proprioception from different body parts and ultimately terminate in the cerebellum, working with it in motor learning and making corrections during ongoing movements?
Which tracts convey unconscious proprioception from different body parts and ultimately terminate in the cerebellum, working with it in motor learning and making corrections during ongoing movements?
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Where do the first order cell bodies of the Dorsal Column - Medial Lemniscus tract reside?
Where do the first order cell bodies of the Dorsal Column - Medial Lemniscus tract reside?
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Which type of fibers are found in the lateral division of the dorsal rootlets?
Which type of fibers are found in the lateral division of the dorsal rootlets?
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Where do the contralateral fibers of the Dorsal Column - Medial Lemniscus tract cross?
Where do the contralateral fibers of the Dorsal Column - Medial Lemniscus tract cross?
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Where do afferent fibers travel into the cord?
Where do afferent fibers travel into the cord?
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Where is the major area for processing the emotional component of pain located, connected with various other areas for pain modulation?
Where is the major area for processing the emotional component of pain located, connected with various other areas for pain modulation?
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Where do the ipsilateral fibers of the Dorsal Column - Medial Lemniscus tract ascend?
Where do the ipsilateral fibers of the Dorsal Column - Medial Lemniscus tract ascend?
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What type of information is conveyed by the Dorsal Column - Medial Lemniscus tract?
What type of information is conveyed by the Dorsal Column - Medial Lemniscus tract?
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Where do the axons of spinal nerves S5–T7 ascend in the spinal cord?
Where do the axons of spinal nerves S5–T7 ascend in the spinal cord?
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Where do the axons of spinal nerves T6-C1 ascend in the spinal cord?
Where do the axons of spinal nerves T6-C1 ascend in the spinal cord?
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Where are the 3rd order cell bodies located for the axons of spinal nerves T6-C1?
Where are the 3rd order cell bodies located for the axons of spinal nerves T6-C1?
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Which tract within the anterolateral system conveys cutaneous information associated with alertness, consciousness, and pain?
Which tract within the anterolateral system conveys cutaneous information associated with alertness, consciousness, and pain?
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Which tract conveys unconscious proprioception from different body parts and ultimately terminates in the cerebellum?
Which tract conveys unconscious proprioception from different body parts and ultimately terminates in the cerebellum?
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Where does the neospinothalamic pathway project to for integration of sensory inputs and emotional processing of pain?
Where does the neospinothalamic pathway project to for integration of sensory inputs and emotional processing of pain?
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Which pathway produces sharp and well-localized pain within the spinothalamic tracts?
Which pathway produces sharp and well-localized pain within the spinothalamic tracts?
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Where is the major area for processing the emotional component of pain located, connected with various other areas for pain modulation?
Where is the major area for processing the emotional component of pain located, connected with various other areas for pain modulation?
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What type of information is conveyed by the anterolateral system?
What type of information is conveyed by the anterolateral system?
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Where does modulation of pain occur using interneurons in the spinal cord and supraspinal pathways?
Where does modulation of pain occur using interneurons in the spinal cord and supraspinal pathways?
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Where do the 2nd order cell bodies reside for the axons of spinal nerves S5-T7?
Where do the 2nd order cell bodies reside for the axons of spinal nerves S5-T7?
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What is the function of tracts from the spinal cord to the cerebellum, such as the dorsal spinocerebellar tract?
What is the function of tracts from the spinal cord to the cerebellum, such as the dorsal spinocerebellar tract?
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Study Notes
Ascending Sensory Pathways and Tracts in the Spinal Cord
- Axons of spinal nerves T6-C1 ascend in the fasciculus cuneatus, with 2nd order cell bodies in the nuclei gracile and cuneatus
- 3rd order cell bodies are in the ventral posterior (lateral) thalamic nucleus, and axons course through the internal capsule to the sensory cortex
- The anterolateral system conveys pain and temperature, with A-delta and C fibers predominantly crossed and located in the ventral white commissure
- The anterolateral system includes three tracts: spinothalamic (neospinothalamic, paleospinothalamic), spinoreticular, and spinomesencephalic
- The spinothalamic tracts are somatotopically organized, with neospinothalamic being sharp and well-localized, and paleospinothalamic conveying dull, achy pain
- The spinoreticular tract conveys cutaneous information associated with alertness, consciousness, and pain, while the spinomesencephalic axons ascend to the superior colliculus and periaqueductal gray for reflex responses and pain modulation
- The neospinothalamic pathway projects to the primary sensory cortex, posterior parietal lobe, insula, and amygdala, allowing for integration of sensory inputs and emotional processing of pain
- Spinoreticular, spinomesencephalic, and spinohypothalamic pathways produce elementary aspects such as autonomic activation, escape responses, arousal, and fear, with thalamic nuclei projecting to the limbic system
- The anterior cingulate cortex is a major area for processing the emotional component of pain, connected with various other areas for pain modulation
- Modulation of pain occurs using interneurons in the spinal cord and supraspinal pathways, such as the periaqueductal gray and tracts from the spinal cord to the cerebellum for unconscious proprioception
- Tracts from the spinal cord to the cerebellum include the dorsal spinocerebellar tract, cuneocerebellar tract, ventral spinocerebellar tract, spino-olivary tract, and olivocerebellar tract
- These tracts convey unconscious proprioception from different body parts and ultimately terminate in the cerebellum, working with it in motor learning and making corrections during ongoing movements.
Ascending Sensory Pathways and Tracts in the Spinal Cord
- Axons of spinal nerves T6-C1 ascend in the fasciculus cuneatus, with 2nd order cell bodies in the nuclei gracile and cuneatus
- 3rd order cell bodies are in the ventral posterior (lateral) thalamic nucleus, and axons course through the internal capsule to the sensory cortex
- The anterolateral system conveys pain and temperature, with A-delta and C fibers predominantly crossed and located in the ventral white commissure
- The anterolateral system includes three tracts: spinothalamic (neospinothalamic, paleospinothalamic), spinoreticular, and spinomesencephalic
- The spinothalamic tracts are somatotopically organized, with neospinothalamic being sharp and well-localized, and paleospinothalamic conveying dull, achy pain
- The spinoreticular tract conveys cutaneous information associated with alertness, consciousness, and pain, while the spinomesencephalic axons ascend to the superior colliculus and periaqueductal gray for reflex responses and pain modulation
- The neospinothalamic pathway projects to the primary sensory cortex, posterior parietal lobe, insula, and amygdala, allowing for integration of sensory inputs and emotional processing of pain
- Spinoreticular, spinomesencephalic, and spinohypothalamic pathways produce elementary aspects such as autonomic activation, escape responses, arousal, and fear, with thalamic nuclei projecting to the limbic system
- The anterior cingulate cortex is a major area for processing the emotional component of pain, connected with various other areas for pain modulation
- Modulation of pain occurs using interneurons in the spinal cord and supraspinal pathways, such as the periaqueductal gray and tracts from the spinal cord to the cerebellum for unconscious proprioception
- Tracts from the spinal cord to the cerebellum include the dorsal spinocerebellar tract, cuneocerebellar tract, ventral spinocerebellar tract, spino-olivary tract, and olivocerebellar tract
- These tracts convey unconscious proprioception from different body parts and ultimately terminate in the cerebellum, working with it in motor learning and making corrections during ongoing movements.
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Description
Test your knowledge of the ascending sensory pathways and tracts in the spinal cord with this quiz. Explore the organization, functions, and connections of the sensory system, including the spinothalamic, spinoreticular, and spinomesencephalic tracts, as well as the role of the cerebellum in unconscious proprioception and motor learning.
