Flashcards in Cerebellum Deck (29)
Initiation and control of voluntary movement
Timing of movement/muscle actions
Moment-to-moment error correction
Compensating or cerebral cortex lesion
Motor learning and adaptive adjustments
Dysmetria of ipsilateral UE movement
Unsteadiness w/ walking
Facial sensory loss
*gait usually okay*
Biggest predictor of recovery:
Amount of cerebellar nuclei involvement
Function of cerebellar nuclei:
Relay station for information
Medial zone - comprised of:
Medial zone - functions:
Postural control and muscle tone
Gaze and other eye movements
Vermis - function:
Postural control ==> central cerebellar problems
What are central cerebellar problems?
Using feedback to help with accuracy
Intermediate zone - comprised of:
Intermediate zone - functions:
Controlling coordination of agonist-antagonist muscle pairs during walking and voluntary limb movements (for accuracy of movement)
Lateral zone - comprised of:
2 broad lateral hemispheres
Lateral zone - functions:
Control of complex, multi-joint, voluntary limb movements (esp for vision)
Planning of complex movement
Assessment of movement errors
Will damage to the lateral zone see improvement back to baseline?
Lateral zone - deficits:
Strength 2/2 communication with cortex but because of lack of timing and planning - strength can improve
Flocculonodular lobe - function:
Control of eye movement (VOR - vestib)
Medial and intermediate zones
Damage to vestibulocerebellum...
Increase postural sway
Oscillations of head and trunk
Will vestib problems w/ damage to vestibulocerebellum respond to vestib tx'ment?
Will NOT respond to maneuvers bc are CENTRAL problem, not BPPV or UVH
Need VOR interventions
Damage to spinocerebellum...
Loss of "updating" afferent information (difficulty adapting)
Inappropriate amplitude of muscle force (poor recruitment)
Inappropriate timing of muscle onsets
Abnormalities of balance w/ absence or decreased preparatory postural adjustments
Challenges with damage to spinocerebellum...
Complex motor activities
Damage to cerebrocerebellum...
Problems w/ movement preparation
Delays w/ movement initiation
Difficulty w/ timing movements
Impaired temporal coordination of multi-joint movements and spatial coordination
What modifies function of the cerebellum and cerebellar circuitry?
Experience - increase in # of effective preferred synaptic paths
Signs of cerebellar dysfunction:
Lack of check
Cerebellar tremor (action)
Kinetic tremor (intention)
Oculomotor deficits (saccades slowed and dysmetric, impaired or absent VOR, nystagmus at ER vertical/lateral gaze)
Impaired motor learning
Muscle tone with cerebellar damage...