Questions and Answers
What are the functions of the ascending tract?
They send sensory feedback from the periphery to the cerebrum and cerebellum.
What's the acronym to remember the ascending tract?
2F 7S
What are the primary ascending tracts?
Fasciculus cuneatus, fasciculus gracilis, spinocerebellar tract (dorsal), spinocerebellar tract (ventral), spino-olivary tract, spinoreticular tract, spinotectal tract, spinothalamic tract (anterior), spinothalamic tract (lateral).
Which tract is responsible for sensory information for the trunk, neck, and upper extremity proprioception, 2-point discrimination, and graphesthesia?
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Which tract is responsible for sensory information for the trunk, and lower extremity proprioception, two-point discrimination, and graphesthesia?
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Which tract is responsible for the sensory information for ipsilateral subconscious proprioception, tension in muscles, joint sense, posture of the trunk, and lower extremities?
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Which tract is responsible for sensory information for ipsilateral subconscious proprioception, tension in muscles, joint sense, posture of the trunk, upper extremities, and lower extremities?
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Which spinal tract ascends to the cerebellum and relays information from cutaneous and proprioceptive organs?
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Which tract provides the pathway for reticular formation that influences levels of consciousness?
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Which spinal tract provides sensory information for spinovisual reflexes and assists with movement of eyes and head toward a stimulus?
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What is the spinal cord tract for light touch and pressure?
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What is the spinal cord tract for pain and temperature sensation?
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Tracts descending to the spinal cord are involved in what?
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What is the largest descending tract of the spinal cord and where does it originate?
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What is the acronym to remember the descending efferent tracts?
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What are the primary six descending (efferent) tracts of the spinal cord?
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Which tract is responsible for ipsilateral voluntary, discrete, and skilled movements?
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Which tract is responsible for contralateral voluntary fine movement?
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Which tract is responsible for facilitation or inhibition of voluntary and reflex activity?
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Which tract is responsible for motor input of gross postural tone, facilitating activity of flexor muscles and inhibiting the activity of extensor muscles?
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What is the motor tract responsible for contralateral postural muscle tone associated with auditory/visual stimuli?
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What is the motor tract responsible for ipsilateral gross postural adjustments subsequent to head movements; facilitating activity of the extensor muscles and inhibiting the activity of the flexor muscles?
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Study Notes
Ascending Tracts
- Ascending tracts carry sensory feedback from peripheral areas to the cerebrum and cerebellum.
- Acronym "2F 7S" helps remember the ascending tracts.
- Primary ascending tracts include:
- Fasciculus cuneatus (posterior column)
- Fasciculus gracilis (posterior column)
- Spinocerebellar tracts (dorsal and ventral)
- Spino-olivary tract
- Spinoreticular tract
- Spinotectal tract
- Spinothalamic tracts (anterior and lateral)
- Fasciculus cuneatus provides sensory information for the trunk, neck, and upper extremities, crucial for proprioception, two-point discrimination, and graphesthesia.
- Fasciculus gracilis is responsible for sensory feedback from the trunk and lower extremities, also related to proprioception and two-point discrimination.
- Dorsal spinocerebellar tract processes ipsilateral subconscious proprioception, muscle tension, joint sense, and trunk/LE posture.
- Ventral spinocerebellar tract conveys similar information but includes UE as well.
- Spino-olivary tract ascends to the cerebellum, relaying information from skin and proprioceptive organs.
- Spinoreticular tract influences consciousness through the reticular formation.
- Spinotectal tract assists in orienting head and eye movements toward stimuli.
- Anterior spinothalamic tract is responsible for light touch and pressure sensations.
- Lateral spinothalamic tract conveys pain and temperature sensations.
Descending Tracts
- Descending tracts facilitate voluntary motor functions, muscle tone regulation, reflexes, equilibrium, visceral innervation, and modulation of sensory signals.
- The largest descending tract is the corticospinal tract, originating in the cerebral cortex.
- Acronym "2C 2R TV" helps memorize descending efferent tracts.
- Primary descending tracts include:
- Anterior corticospinal tract
- Lateral corticospinal tract
- Reticulospinal tract
- Rubrospinal tract
- Tectospinal tract
- Vestibulospinal tract
- Anterior corticospinal tract is responsible for ipsilateral voluntary, discrete, and skilled movements.
- Lateral corticospinal tract facilitates contralateral voluntary fine movements.
- Reticulospinal tract influences voluntary and reflex activity through facilitation or inhibition.
- Rubrospinal tract aids motor input for gross postural tone, facilitating flexor muscle activity while inhibiting extensors.
- Tectospinal tract corresponds to contralateral postural muscle tone in reaction to auditory and visual stimuli.
- Vestibulospinal tract manages ipsilateral gross postural adjustments due to head movements, facilitating extensor activity and inhibiting flexor activity.
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Test your knowledge on the functions and components of ascending and descending tracts with these flashcards. Explore key acronyms, primary tracts, and their roles in sensory feedback to the brain. Ideal for students studying neuroscience or anatomy.
