Flashcards in Neuro Physiology Deck (207)
What are the 3 levels of functional hierarchy observed in motor control?
Strategy - basal ganglia
Tactics - motor cortex & cerebellum
Execution - brainstem & spinal cord
What do lateral spinal pathway control?
Voluntary movements of distal muscles
What do ventromedial spinal pathways control?
Control posture & locomotion
Where does the CS tract cross over?
What does the right motor cortex control?
Left side (motor control)
Where do CST neurons synapse?
Where does the Rubrospinal tract originate?
Red nucleus (midbrain)
If a lesion of CST or RST occurs what will be observed?
Fine movements of hands & arms lost
If the CST alone is lesioned what will be observed?
Some deficits seen however function will reappear after a few months
What is the Brodmanns area associated with motor control?
What are the 2 ventromedial pathways called?
What is the vestibulospinal tract responsible for?
Stabilises head & neck
What is the tectospinal tract responsible for?
Ensures eyes remain stable as body moves
Where do the reticulospinal tracts originate?
What is the function of the reticulospinal tracts?
Maintains balance & body posture
What muscles does the reticulospinal tract activate?
Where are LMNs found?
Ventral horn of spinal cord
Medial motorneurones will control which muscles?
Axial & proximal limb muscles
Lateral motor neurones will control which muscles?
Distal limb muscles
What is another name for he primary motor cortex?
What lies in front of the primary motor cortex?
Pre-motor cortex (PMA)
Stimulating the right primary motor cortex will result in what?
Twitching of right limb
What inputs to the posterior parietal cortex allow knowledge of body in space?
Axons from which 2 brain areas converge on Area 6?
Posterior Parietal cortex
If you only think about carrying out a movement, which are of the brain will become active?
Area 6 - pre-motor cortex
What is Area 6 responsible for?
Encodes decried actions and converts this int how to carry them out
Where will neuronal stimulation be identified just before a planned movement takes place?
PMA - Premotor cortex
In order to perform precise movements, what firing of Abs will be observed in Area 4?
Integrated activity of large population of neurones in M1 will produce precise movements
What symptoms/signs will be observed with cortical damage?
Babinski reflex - extension