Postural Control Flashcards
whats the normal CoM
S2
resources required for postural stability and orientation for biomechnical constraints
degree of freeedom
strength
limits of stability
resources required for postural stability and orientation for cognitive functioning
attention
learning
resources required for postural stability and orientation for control of dynamics
gait
proactive
resources required for postural stability and orientation for orientation in space
perception
gravity: surfaces, vision
verticality
resources required for postural stability and orientation for sensory strategies
sensory integration
sensory reweighting
resources required for postural stability and orientation for movement strategies
reactive
anticipatory
voluntary
what is the dorsal pathway to the posterior parietal cortex for?
where in space/location
what is the ventral pathway to inferotemporal cortex for?
what?
postural control in stroke focus on
intensity!!
what % of stroke pts have a balance disability 2-4 weeks post stroke
83%
motor control impairments in stroke
(caused by reduction in # and firing rate of motor units)
slow mvmts, weakness, fatigue, incoordination, decreased force production, co-contractions
3 global impairments in balance
sensation (to detect or anticipate postural disturbance)
neural processing ( to select appropriate feedback/ feedforward postural control)
effective motor output
postural control in PD
with ds progression –> loss in postural stability, gait dysfunction, frequent falls
postural instability less responsive to drug therapy
up to 68% falls in later stages of ds
lack of balance reaction, flexed posture, decreased trunk rotation, difficulty executing simultaneous mvmts/sequential mvmts
vestibular system roles
perception of body position and self motion
orientation of trunk to vertical
controls COM (postural rxns)
stabilize head in space
