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George E. Carvell, PhD, PT   University of Pittsburgh
 
CEREBELLAR FUNCTIONS *
* Copyright  GEC 1990 (revised 2000)
  COORDINATION OF METRICS OF MOVEMENT AND POSTURE: DIRECTION, VELOCITY, TIMING, RATE OF CHANGE OF TORQUE
ERROR DETECTION/CORRECTION
  CURRENT CONTROL: ongoing process of comparison between internal models of intended action to actual events. Includes peripheral afferent feedback from somatosensory, vestibular & visual receptors in the periphery plus central efferent feedback from segmental motor centers via the ventral spinocerebellar tract, as well as, feedforward signals of motor intention from cerebral motor & 'association' areas to the cerebellum via pontine nuclei
  KNOWLEDGE OF RESULTS (KR): utilization of feedback regarding performance to adjust output over a number of repetitions (practice effects and learning)
  SYNERGY: PRECISE CONTROL OF AGONIST, SYNERGIST, AND ANTAGONIST MUSCLES FOR THE CONCURRENT AND/OR SEQUENTIAL ORDERING OF MUSCLE CONTRACTIONS IN PATTERNED MOVEMENTS AND POSTURAL ADJUSTMENTS (Group muscle action to reduce the degrees of freedom to be controlled)
  INITIATION AND REGULATION OF 'AUTOMATIC' AND 'VOLITIONAL' PROGRAMMED MOTOR OUTPUT UTILIZED IN SKILLED SENSORIMOTOR TASKS
  ADJUSTMENT OF MOTOR GAIN AND REGULATION OF MUSCLE STIFFNESS
  ASSIST OTHER MOTOR AREAS IN THE PLANNING AND PREPROGRAMMING OF COMPLEX, SKILLED SENSORIMOTOR BEHAVIORS and COGNITIVE TASKS?