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Questions and Answers
Damage to the anterior spinothalamic tract can result in:
Damage to the anterior spinothalamic tract can result in:
Which structure is primarily involved in the spinocerebellar system?
Which structure is primarily involved in the spinocerebellar system?
What is the characteristic of axons in the posterior spinocerebellar tract?
What is the characteristic of axons in the posterior spinocerebellar tract?
The dorsal column pathway is responsible for transmitting signals related to:
The dorsal column pathway is responsible for transmitting signals related to:
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What can happen if there is damage to the spinotectal tract?
What can happen if there is damage to the spinotectal tract?
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What type of sensations are carried by the lateral spinothalamic tract?
What type of sensations are carried by the lateral spinothalamic tract?
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Where do the cell bodies of second-order neurons in the spinothalamic tract lie?
Where do the cell bodies of second-order neurons in the spinothalamic tract lie?
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Which nucleus is responsible for transmitting information from Neurone III to the thalamus in the spinothalamic tract?
Which nucleus is responsible for transmitting information from Neurone III to the thalamus in the spinothalamic tract?
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What is the function of the spinotectal tract?
What is the function of the spinotectal tract?
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Which tract carries impulses for non-discriminative touch and pressure from the contralateral side?
Which tract carries impulses for non-discriminative touch and pressure from the contralateral side?
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Where do the cell bodies of the 2nd order neurons of the ventral (anterior) spinocerebellar tract lie?
Where do the cell bodies of the 2nd order neurons of the ventral (anterior) spinocerebellar tract lie?
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Which tract is involved in reflexive turning of the head and eyes towards a point of cutaneous stimulation?
Which tract is involved in reflexive turning of the head and eyes towards a point of cutaneous stimulation?
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In Friedrich's ataxia, which system is primarily affected, leading to symptoms like incoordination of arms, intense tremor, wide base reeling gait, and ataxia?
In Friedrich's ataxia, which system is primarily affected, leading to symptoms like incoordination of arms, intense tremor, wide base reeling gait, and ataxia?
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From which part do the impulses from the spinal cord reach the cerebellum via the inferior olivary nucleus in the indirect spinocerebellar pathway (spino-olivocerebellar)?
From which part do the impulses from the spinal cord reach the cerebellum via the inferior olivary nucleus in the indirect spinocerebellar pathway (spino-olivocerebellar)?
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Which tract crosses to the opposite side twice, once in the spinal cord and again within the cerebellum?
Which tract crosses to the opposite side twice, once in the spinal cord and again within the cerebellum?
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Where does the second-order neurone in the spinothalamic pathway cross over to the opposite side of the CNS?
Where does the second-order neurone in the spinothalamic pathway cross over to the opposite side of the CNS?
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Which part of the brain does the third-order neurone in the dorsal column pathway have its cell body?
Which part of the brain does the third-order neurone in the dorsal column pathway have its cell body?
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What type of information is carried by the dorsal column pathway?
What type of information is carried by the dorsal column pathway?
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Which major tracts are found within the dorsal column pathway?
Which major tracts are found within the dorsal column pathway?
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Where do primary afferent neurons enter the cord in the dorsal column pathway?
Where do primary afferent neurons enter the cord in the dorsal column pathway?
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Study Notes
Spinal Tracts
- Damage to the anterior spinothalamic tract can result in loss of pain and temperature sensation.
Spinocerebellar System
- The structure primarily involved in the spinocerebellar system is the cerebellum.
- Axons in the posterior spinocerebellar tract have a characteristic of being unipolar brush cells.
Dorsal Column Pathway
- The dorsal column pathway is responsible for transmitting signals related to fine touch, vibration, and proprioception.
- The pathway carries information about discriminative touch, pressure, and proprioception.
Spinotectal Tract
- Damage to the spinotectal tract can result in defective reflexive turning of the head and eyes towards a point of cutaneous stimulation.
- The function of the spinotectal tract is to transmit information for reflexive movements.
Spinothalamic Tract
- The lateral spinothalamic tract carries sensations of pain and temperature.
- The cell bodies of second-order neurons in the spinothalamic tract lie in the dorsal horn of the spinal cord.
- The ventral posterior lateral (VPL) nucleus is responsible for transmitting information from Neurone III to the thalamus in the spinothalamic tract.
Ventral Spinocerebellar Tract
- The cell bodies of the 2nd order neurons of the ventral (anterior) spinocerebellar tract lie in the ventral horn of the spinal cord.
Spinocerebellar Tracts
- The anterior spinocerebellar tract carries impulses for non-discriminative touch and pressure from the contralateral side.
- The ventral spinocerebellar tract crosses to the opposite side twice, once in the spinal cord and again within the cerebellum.
Friedrich's Ataxia
- In Friedrich's ataxia, the spinocerebellar system is primarily affected, leading to symptoms like incoordination of arms, intense tremor, wide base reeling gait, and ataxia.
Spinolivocerebellar Pathway
- Impulses from the spinal cord reach the cerebellum via the inferior olivary nucleus in the indirect spinocerebellar pathway.
Spinothalamic Pathway
- The second-order neuron in the spinothalamic pathway crosses over to the opposite side of the CNS in the spinal cord.
- The third-order neuron in the dorsal column pathway has its cell body in the thalamus.
Dorsal Column Pathway
- The pathway carries information about discriminative touch, pressure, and proprioception.
- The major tracts found within the dorsal column pathway are the fasciculus gracilis and fasciculus cuneatus.
- Primary afferent neurons enter the cord in the dorsal column pathway through the dorsal root ganglia.
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Description
Test your knowledge about the Spinothalamic Tracts, which carry impulses related to sensations like pain, thermal, touch, and pressure across the body. Learn about how the fibers decussate in the brain stem and transmit information to the primary sensory cortex.
