Neuroscience: ascending tracts Flashcards

1
Q

Ascending Tracts

Sensory tract for trunk, neck, and upper extremity proprioception, vibration, two-point discrimination, and graphesthesia

A

Fasciculus Cuneatus (posterior or dorsal column)

  • Brain lesion: contralateral loss
  • SC lesion: ipsilateral loss
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2
Q

Ascending Tracts

Sensory tract for trunk and lower extremity proprioception, two-point discrimination, vibration, and graphesthesia

A

Fasciculus Gracilis (posterior or dorsal column)

  • Brain leasion: contralateral loss
  • SC lesion: ipsilateral loss
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3
Q

Ascending Tracts

Sensory tract that ascends to the cerebellum for ipsilateral subconscious proprioception, tension in muscles (GTO’s and muscle spindles), joint sense, and posture of the trunk and lower extremities

A

Spinocerebellar Tract (dorsal)

Travels ipsilaterally in SC, brainstem & cerebellum

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4
Q

Ascending Tracts

Sensory tract that ascends to the cerebellum for ipsilateral subconscious proprioception, tension in muscles (GTO’s and muscle spindles), joint sense, and posture of the trunk and upper extremities, and lower extremities

A

Spinocerebellar Tract (ventral)

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5
Q

Ascending Tracts

Sensory tract for pain, temperature, and simple tactile sensations: light touch and pressure

A

Spinothalamic Tract

(Anterolateral System)

  • SC injury: contralateral loss
  • Brain Injury: contralateral
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6
Q

Ascending Tracts

Sensory tract for light touch and pressure

A

Anterior Spinothalamic Tract

  • SC injury: contralateral loss
  • Brain injury: contralateral loss
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7
Q

Ascending Tracts

Sensory tract for pain and temperature sensation

A

Lateral Spinothalamic Tract

  • SC injury: contralateral loss
  • Brain injury: contralateral loss
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8
Q

Ascending Tracts

Ascends to the cerebellum and relays information from cutaneous and proprioceptive organs

A

Spino-olivary Tract

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9
Q

Ascending Tracts

The afferent pathway for the reticular formation that influences levels of consciousness

A

Spinoreticular Tract

part of the spinothalamic system

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10
Q

Ascending Tracts

A patient’s medical chart indicates that a patient has a lesion in the posterior portion of the spinal cord. Which of the following impairments would MOST likely be observed?

  1. inability to determine joint position
  2. inability to distinguish between hot and cold
  3. inability to distinguish between sharp and dull
  4. inability to feel light touch
A

Proprioception is the sense of static joint position. Proprioceptive information is transmitted to the brain via the dorsal column-medial lemniscus tract.

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11
Q

Ascending Tracts

Proprioception is the sense of static joint position. Proprioceptive information is transmitted to the brain via the

A

dorsal column-medial lemniscus tract

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12
Q

Ascending Tracts

which tract is located in the posterior portion of the spinal cord

A

dorsal column-medial lemniscus tract

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13
Q

Ascending Tracts

Sensory information is transmitted to the brain either by the spinothalamic tract or the dorsal column-medial lemniscus tract. The spinothalamic tract is located in the

A

anterior and lateral portions of the spinal cord

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14
Q

Ascending Tracts

Sensory information is transmitted to the brain either by the spinothalamic tract or the dorsal column-medial lemniscus tract. The dorsal column-medial lemniscus tract is located in the

A

posterior portion of the spinal cord

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15
Q

Ascending Tracts

The spinothalamic tract primarily transmits nondiscriminatory sensations (e.g., temperature, pain, touch), while the dorsal column-medial lemniscus tract transmits more…

A

discriminative sensations (e.g., discriminative touch, stereognosis, kinesthesia)

(vibration, proprioception, discriminative touch)

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