Neuroscience: ascending tracts Flashcards
Ascending Tracts
Sensory tract for trunk, neck, and upper extremity proprioception, vibration, two-point discrimination, and graphesthesia
Fasciculus Cuneatus (posterior or dorsal column)
- Brain lesion: contralateral loss
- SC lesion: ipsilateral loss
Ascending Tracts
Sensory tract for trunk and lower extremity proprioception, two-point discrimination, vibration, and graphesthesia
Fasciculus Gracilis (posterior or dorsal column)
- Brain leasion: contralateral loss
- SC lesion: ipsilateral loss
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
Spinocerebellar Tract (dorsal)
Travels ipsilaterally in SC, brainstem & cerebellum
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
Spinocerebellar Tract (ventral)
Ascending Tracts
Sensory tract for pain, temperature, and simple tactile sensations: light touch and pressure
Spinothalamic Tract
(Anterolateral System)
- SC injury: contralateral loss
- Brain Injury: contralateral
Ascending Tracts
Sensory tract for light touch and pressure
Anterior Spinothalamic Tract
- SC injury: contralateral loss
- Brain injury: contralateral loss
Ascending Tracts
Sensory tract for pain and temperature sensation
Lateral Spinothalamic Tract
- SC injury: contralateral loss
- Brain injury: contralateral loss
Ascending Tracts
Ascends to the cerebellum and relays information from cutaneous and proprioceptive organs
Spino-olivary Tract
Ascending Tracts
The afferent pathway for the reticular formation that influences levels of consciousness
Spinoreticular Tract
part of the spinothalamic system
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?
- inability to determine joint position
- inability to distinguish between hot and cold
- inability to distinguish between sharp and dull
- inability to feel light touch
Proprioception is the sense of static joint position. Proprioceptive information is transmitted to the brain via the dorsal column-medial lemniscus tract.
Ascending Tracts
Proprioception is the sense of static joint position. Proprioceptive information is transmitted to the brain via the
dorsal column-medial lemniscus tract
Ascending Tracts
which tract is located in the posterior portion of the spinal cord
dorsal column-medial lemniscus tract
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
anterior and lateral portions of the spinal cord
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
posterior portion of the spinal cord
Ascending Tracts
The spinothalamic tract primarily transmits nondiscriminatory sensations (e.g., temperature, pain, touch), while the dorsal column-medial lemniscus tract transmits more…
discriminative sensations (e.g., discriminative touch, stereognosis, kinesthesia)
(vibration, proprioception, discriminative touch)