13_Somatosensory_Essential Pathway Differences Flashcards
Where are the cell bodies of the…
DC-ML and ALS?
Dorsal Root Ganglion
Where are the cell bodies of the…
Trigeminal Mechanosensory?
Spinal Trigeminal System?
Trigeminal Ganglion
Where are the cell bodies of the…
Dorsal Spinalcerebellar Tract?
Cuneocerebellar Tract?
Dorsal Root Ganglion
Where are the 1st order tracts of the DC-ML?
Ascends ispilaterally in Dorsal Column Upper body (above T6) = Cuneate Lower body (below T6) = Gracile
Where are the synapses of the DC-ML?
Dorsal Column Nuclei (Gracile or Cuneate Nucleus)
Where is the decussation for the DC-ML?
Internal Arcuate Fibers in the Caudal Medulla
Where is the second order tract of the DC-ML?
Medial Lemniscus
Where are the 1st order tracts of the ALS?
Enters through dorsal root, bifurcates to ascending and descending branches into Dorsolateral Tract of Lissauer before entering dorsal horn
Where are the synapses of the ALS?
Dorsal Horn (Lamina I, IV and V
Where is the decussation for the ALS?
Anterior/Ventral White Commissure (Spinal Cord)
Where are the second order tracts of the ALS?
Anterolateral System/ Spinalthalamic Tract (STT)
Where are the first order tracts of the Trigeminal Mechanosensory system?
Enter pons directly from the trigeminal ganglion
Where is the synapse of the Trigeminal Mechanosensory system?
Principle Nucleus of the trigeminal complex
Where is the decussation of the Trigeminal Mechanosensory system?
Pons
Where is the second order tract of the trigeminal mechanosensory system?
Medial Lemniscus (trigeminal tract)
Where is the first order tract of the Spinal Trigeminal System?
Enter pons and descend in spinal trigeminal tract to levels in medulla to cervical spian cord
Where is the synapse of the of the Spinal Trigeminal System?
Spinal Nucleus (Trigeminal Complex)
Where is the decussation of the Spinal Trigeminal Tract?
Medulla to Cervical Spinal Cord
Where is the second order tract of the Spinal Trigeminal Tract?
Medial Leminscus (trigeminothalamic tract)
Where is the 2nd order to 3rd order synapse of the…
DC-ML and ALS?
Trigeminal Mechanosensory?
- Ventral Posterior Lateral (VPL) Nucleus of Thalamus
* VPM Nucleus of Thalamus
Where are the first order tracts of the
1) DC-ML?
2) Trigeminal Mechanosensory?
3) ALS
4) Spinal Trigeminal System?
1) Ascends ispilaterally in Dorsal Column Upper body (above T6) = Cuneate Lower body (below T6) = Gracile
2) Enters pons directly from trigeminal ganglion
3) Enters through dorsal root, bifurcates to ascending and descending branches into Dorsolateral Tract of Lissauer before entering dorsal horn
4) Enter pons and descend in spinal trigeminal tract to levels in medulla to cervical spian cord
Where are the synapses of the
1) DC-ML?
2) Trigeminal Mechanosensory?
3) ALS
4) Spinal Trigeminal System?
1) Dorsal Column Nuclei (Gracile or Cuneate Nucleus)
2) Principal Nucleus (Trigeminal Complex)
3) Dorsal Horn (Lamina I, IV and V)
4) Spinal Nucleus (Trigeminal Complex)
Where are the decussations of the
1) DC-ML?
2) Trigeminal Mechanosensory?
3) ALS
4) Spinal Trigeminal System?
1) Internal Arcuate Fibers (Caudal Medulla)
2) Pons
3) Anterior/Ventral White Commissure (Spinal Cord)
4) Medulla to Cervical Spinal Cord
Where are the second order tracts of the
2) Trigeminal Mechanosensory?
3) ALS
4) Spinal Trigeminal System?
1) Medial Lemniscus
2) Medial Leminiscus trigeminothalamic tract)
3) Anterolateral System/ Spinalthalamic Tract (STT)
4) Medial Leminiscus (trigeminothalamic tract)
Where are the tracts for the
Dorsal Spinocerebellar Tract (DSCT)? Cuneocerebellar Tract (CCT)?
1) Enters dorsal horn at spinal cord (thoracic, lumbar, sacral)
2) Enters dorsal horn at spinal cord (cervical)
Where are the synapses for the
Dorsal Spinocerebellar Tract (DSCT)? Cuneocerebellar Tract (CCT)?
1) Clark’s Nucleus (Lower Spinal Cord)
2) External Cuneate Nucleus (Medulla)
Where are the second order tracts of the
Dorsal Spinocerebellar Tract (DSCT)? Cuneocerebellar Tract (CCT)?
Dorsal Spinocerebellar
Cuneocerebellar
Where is the destination for the
Dorsal Spinocerebellar Tract (DSCT)? Cuneocerebellar Tract (CCT)?
Cerebellum
There are no third order tracts
