Topic 5 - motor control Flashcards
what is important about having info transmitted through 1st, 2nd, and 3rd order neurons
different synapses allows for the activation of reflexes
where do somatosensory pathways carry info to/from
to the brain
from somatosensory receptors
processed in S1/cerebellum
where is S1 located
postcentral gyri on anterior portion of parietal lobes
why is sensory info passed to cerebellum
critical input for postrue, balance, and coordination of skilled mvmts
(helps with skilled mvmts on autopilot)
what is the upper motor neurons function
info essential in the planning and execution of voluntary mvmts
- cell bodies in M1
what is the local circuit neurons function
info used to coordinate rhythmic actiosn of certain muscle groups (walking)
- in brainstem and spinal cord (function with reflex circuits - interneurons)
what is the basal nuclei neurons function
info used to initate/terminate mvmts, suppress unwanted mvmts, and regulate muscle tone
coordinates sensory input and motor commands
- connect basal nuclei with the motor cortex and brainstem
what is the cerebellar neurons function
coordinate signals form M1 by monitoring any differences between intended and actual mvmt
- detected errors used to update and coordinate mvmt
(unilateral processing)
what is the lower motor neurons function
extend from CNS via the brainstem to spinal cord to innervate the skeletal muscle
only part of the circuit to provide direct output to the skeletal muscles - leaves CNS
what is the direct motor pathway involved in the control of body mvmt
signals sent straight from M1 to lower motor neurons
what is the indirect motor pathway involved in the control of body mvmt
info processed from motor centres in the basal nuclei, cerebellum, and cerebral cortex before transmission to the lower motor neurons
