Motor System Flashcards
Feedforward
Anticipatory use of sensory information
Feedback
Use of sensory information during or after movement to make corrections
What disrupts the positioning of limbs?
Deafferentation
Where in the brain do you make a decision?
Anterior frontal lobe
What do motor planning areas activate?
Cerebellum and basal ganglia
Where do upper motor neurons go?
To spinal interneurons and lower motor neurons
Where do lower motor neurons go?
Skeletal muscles
What is the pathway for planning a movement?
Motor planning area
Cerebral circuits
Descending motor pathways
Spinal interneurons
Lower motor neurons
Why does damage to the corticobrainstem only cause paresis?
Due to dual innervation
What does damage to a cranial nerve result in?
Ipsilateral paralysis
What does the corticobrainstem control?
Face, head, and neck (UMM)
Where does the corticobrainstem synapse?
LMN of cranial nerves
What are the medial motor tracts?
Medial and lateral vestibulospinal
Reticulospinal
What are the characteristics of the medial motor tracts?
Do not come from primary motor cortex (unconscious and do not provide force production)
What are the non specific tracts?
Curelospinal and raphespinal (only need to know excitation and inhibition)
