Motor control - Corticofugal and corticobulbospinal tracts
9 important questions on Motor control - Corticofugal and corticobulbospinal tracts
The right side of the brain controls the left side of the body. So, somehwere the axons must cross over (decussation). Which neurons cross over?
What is the difference between commissure and decussation?
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What is the cortico-bulbospinal system?
Axons that originate in the motor cortex and project to the bulbar and medulary motorneurons and interneurons
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What influences the thickness of the cortex layers?
From which layer do the pyramidal neurons originate?
Vth layer of the motor cortex
This neurons are called pyramidal neurons because of their shape
What is special about the Betz cells?
-> minority but very fast
There are also some tracts that depart from the premotor cortex, to which structures do this tracts go?
- tectum
- red nucleus
- pons
- bulbar reticular information
- vestibular nuclei
- 2nd motor neurons and interneurons
Caudal to the pons the cortico-bulbospinal tract is renamed, which name|
Pyramidal tract
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Which part of the motor cortex is perfused by which artery?
Rest by the middle cerebral artery (a. Cerebri media)
--> homunculus = poppetje
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