HSC 350 Lecture 12: March 12, 2015
Document Summary
The cerebellar function detect the difference or motor error between the intended movement and the actual movement. It interact with the upper motor neuron to reduce motor error. Correction of motor error can occur (1)concurrently with movement or (2) motor learning when the correction is stored. The cerebellar promotes voluntary movements that are precise and economical for muscular movement. Cerebellar injury result in loss of muscle tone and clumsy, unsure movement. Cerebellar fibers also send information to brain stem nuclei, which in turn influence motor neurons of the spinal cord. Defined as a series of erroneous correction of muscle movements. Ataxia: abnormal execution of voluntary movement; characterized by lack of coordination. Dysmetria: problems initiating responses with the affected limb and controlling size of a movement and rate and regularity of repeated movements. Concerned with the regulation of highly skilled movement; especially the planning and execution of complex spatial and temporal sequences of movement (including speech).
