The cerebellum and motor learning Flashcards
Role of the cerebellum
Maintenance of balance and posture
Coordination of voluntary movements
Motor learning
Cognitive functions
Functional subdivisions of the cerebellum
Vestibulocerebellum
Spinocerebellum
Cerebrocerebellum
Lobar anatomy of the cerebellum
Vermis is innermost (fastigial nucleus)
Paravermal is middle section (interposed nucleus)
Hemispheres are outer section (dentate nucleus)
Fastigial output
Medial descending systems
Motor execution
Interposed output
Lateral descending systems
Motor execution
Denate ouptut
Areas 4 and 6
Motor planning
Vestibular nuclei
Balance and eye movements
Function of spinocerebellum
Control of muscle tone/ posture
Dysmetria
Movement is not stopped in time
Dysnergia
Decomposition of complex movements
Dysdiadochokinesia
Reduced ability to perform rapidly altering movements
Intentional tremor
Tremor arising when trying to perform goal directed movement
Dysarthria
Articulation incoordination in respiratory muscles
Uneven speech strength and velocity
Nystagmus
Involuntary, rhythmical, repeated oscillations of one or both eyes in any or all directions of view
Movement minimises ability to focus the eyes on one point
Effect of lesion to vestibulocerebllar pathway
Gait ataxia
Unsteadiness of ealking
Effect of lesion in spinocerebllar pathway