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Tracts and Infarks

  1. Tract that corresponds to pain and temperature
    Lateral spinothalamic tract
  2. Damage to the lateral spinothalamic tract causes
    Loss of pain and temperature sensation on the contralateral side of the body below the level or the lesion
  3. Tract that corresponds to crude (nondiscriminiative) touch and pressure
    Anterior spinothalamic tract
  4. Damage to the anterior spinothalamic tract causes
    loss of crude touch and some pressure on the contralateral side of the body below the level of the lesion
  5. Tract that corresponds to

    two point discrimination
    vibratory sense
    conscious proprioception
    stereogenesis (ability to distinguish objects based on size, shape, weight and texture)
    Dorsal column/medial lemniscus system
  6. Damage to the dorsal column/medial lamniscus system causes
    loss of conscious proprioception on the SAME side of the body below the level of the lesion (with eyes closed unable to tell where limb is in space)

    loss of vibration and tactile discrimination below the level of the lesion on the said side
  7. Hemisection of the right side of the spinal cord will cause (2 things)
    Loss of conscious proprioception, discriminative touch and vibration sense on the RIGHT side of the body below the level of the lesion

    Loss of pain and temperature sensibility and crude touch on the LEFT of the body below the level of the lesion
  8. Damage to the posterior (dorsal) spinocerebellar tract causes
    Loss of unconscious proprioception below the level of the lesion on the SAME side of the body
  9. Typical organization of a descending pathway

    first order neuron:
    second order neuron:
    third order neuron:
    cerebral cortex

    interneuron in the ventral horn of the spinal cord

    lower motor neuron in lamina IX of the spinal cord
  10. Damage to the ___ ____ or ___ ___ ___ of the spinal cord can produce signs of an upper motor neuron lesion
    cerebral cortex

    lateral white column
  11. The follow are characteristics of what type of lesion?

    Voluntary movements of the affected muscles are weak or absent

    Profound atrophy doesn't occur but slow wasting of tissues (atrophy of disuse) occurs over several months

    Increased muscle tone (spasticity) due to continuous operation of stretch reflexes (not suppressed by this system 

    Tendon jerks are exaggerated 

    Positive babinsky sign 

    Superficial reflexes are suppressed or absent
    Upper motor neuron lesion
  12. The follow are characteristics of what type of lesion?

    Muscle tone is reduced or absent (flaccid paralysis or paresis)
    Tendon jerk reflexes are weak or absent
    Progressive atrophy of the affected muscles
    Lower motor neuron lesion
  13. Lower motor neuron lesions may occur in the ____ _____ ____ of the spinal cord or the baronets for cranial nerve nuclei
    Ventral gray horns
  14. The ventral posterolateral (VPL) receives the (2)
    • Dorsal column/Medial Lamniscus system 
    • Spinothalamic tract
  15. The ventral posteromedial (VPM) receives the (2)
    • Ascending trigeminal Lamniscus  
    • Gustatory (taste) pathways
  16. Projections of the VPM and VPL terminate in the primary somatic sensory area on the _____ ___ of the cerebral cortex
    Postcentral gyrus
  17. thalamic nuclei that are closely associated with the limbic system and are concerned with the emotional states and recent memory
    Anterior nuclei
  18. thalamic nuclei that functions as an integration center of a large variety of sensory information including somatic, visceral, and olfactory information and the relation of this information to emotional feelings and subjective states
    Medial thalamic nuclei
Author
arikell
ID
337585
Card Set
Tracts and Infarks
Description
Anatomy
Updated

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