Qtr 3 Advanced Neuroanatomy ALS
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Where are the first order neurons of the of the DCML found and what do they respond too?
They are found in the DRG and they respond to mechano-receptors, vibration and fine touch
At what level does the fasciculus cuneatus start?
Where are the second order neurons found for the DCML?
Nuclei gracilis and cuneatus in the medulla
Where do the DCML fibers decussate?
In the medulla (internal arcuate fibers)
Where are the third order neurons of the DCML found?
VPL nucleus of the thalamus
Where are the first order neurons of the spinothalamic (ALS) tract found and what stimuli do they detect?
They are found in the DRG and they respond to nociceptors, thermoreceptors, crude (light) touch
Where are the second order neurons of the spinothalamic tract found?
Lamina I and II
Where do the second order neurons of the spinothalamic tract decussate?
Anterior white commisure at level of DRG synapse
What part of the thalamus are the third order neurons of the ALS found?
What type of motor lesion would have greater than 2+ reflex (hyperreflexia)
Upper Motor Neuron Lesion
What type of paralysis occurs with an upper motor neuron lesion?
What type of paralysis occurs with a lower motor neuron lesion?
Where is the red nucleus found? What does it release? What disease is associated with its dysfunction?
- Found in the Midbrain
- Releases dopamine
- Associated with parkinson's (lack of dopamine)
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