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Branches of the CST
•Branches which are given off early in the descent
return to the cortex to inhibit the activities in adjacent
regions of the cortex
•Branches pass to following areas to keep the sub
cortical areas informed about the cortical motor
activity
  1)Caudate & lentiform nuclei
  2)Red nuclei
  3)Olivary nuclei
  4)Reticular formation
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Other descending pathways to the spinal cord




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Brown sequard syndrome (Hemi section of the spinal cord)




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Brown sequard syndrome (Hemi section of the spinal cord)


•Features
  1)Ipsilateral LMN paralysis & muscular atrophy in the corresponding part of the

  body to the damaged segment of the spinal cord

  2)Ipsilateral spastic paralysis below the of the level lesion (γ motor neuron

  inhibition is lost)

  3)Ipsilateral loss of cutaneous sensation below the of the level lesion

  4)Ipsilateral loss of dorsal column sensation below the of the level lesion

  5)Contralateral pain, temperature, touch & pressure sensations are lost below the

  of the level lesion
                                                       www.medicallecturenotes.com
Brown sequard syndrome (Hemi section of the spinal cord)

Tracts which are affected

   Dorsal column                      : Ipsilateral

   Lateral Spinothalamic tract        : Contralateral

   Anterior Spinothalamic tract       : Contralateral

   Anterior Spino cerebellar tract    : Contralateral

   Posterior Spino cerebellar tract   : Ipsilateral

   Anterior corticospinal tract       : Ipsilateral

   Posterior corticospinal tract      : Ipsilateral

   Autonomic nervous system           : Ipsilateral

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 write a comment it will be a nice encouragement for us "




Dr. Pulasthi Senaratna
                                             www.medicallecturenotes.com

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Descending tract 2

  • 2. Branches of the CST •Branches which are given off early in the descent return to the cortex to inhibit the activities in adjacent regions of the cortex •Branches pass to following areas to keep the sub cortical areas informed about the cortical motor activity 1)Caudate & lentiform nuclei 2)Red nuclei 3)Olivary nuclei 4)Reticular formation www.medicallecturenotes.com
  • 3. Other descending pathways to the spinal cord www.medicallecturenotes.com
  • 4. Brown sequard syndrome (Hemi section of the spinal cord) www.medicallecturenotes.com
  • 5. Brown sequard syndrome (Hemi section of the spinal cord) •Features 1)Ipsilateral LMN paralysis & muscular atrophy in the corresponding part of the body to the damaged segment of the spinal cord 2)Ipsilateral spastic paralysis below the of the level lesion (γ motor neuron inhibition is lost) 3)Ipsilateral loss of cutaneous sensation below the of the level lesion 4)Ipsilateral loss of dorsal column sensation below the of the level lesion 5)Contralateral pain, temperature, touch & pressure sensations are lost below the of the level lesion www.medicallecturenotes.com
  • 6. Brown sequard syndrome (Hemi section of the spinal cord) Tracts which are affected Dorsal column : Ipsilateral Lateral Spinothalamic tract : Contralateral Anterior Spinothalamic tract : Contralateral Anterior Spino cerebellar tract : Contralateral Posterior Spino cerebellar tract : Ipsilateral Anterior corticospinal tract : Ipsilateral Posterior corticospinal tract : Ipsilateral Autonomic nervous system : Ipsilateral www.medicallecturenotes.com
  • 7. "It will take only 2 sec to say thanks and will take only 10 sec to write a comment it will be a nice encouragement for us " Dr. Pulasthi Senaratna www.medicallecturenotes.com