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Squirrel monkeys were trained to perform ballistically initiated flexion movements of the forearm. It is shown that the motor output to agonist and antagonist subsequent to the onset of the movement depends continuously on the movement's parameters, primarily the velocity, as in man. The contribution of cerebellar activities to maintain this relationship was investigated by means of discrete lesions of the cerebellum and inferior olive. After lesions of the cerebellar nuclei, EMG activity of agonist and antagonist is no longer precisely structured. This result implies that activity of the cerebellar nuclei is necessary to maintain the gain and timing of the relationship between sensory inputs and motor outputs. Participation of the inferior olive is also required, since lesions of this structure mimic the effect of destruction of the cerebellar nuclei. Lesions of the cerebellar cortex, instead, affect mainly the timing of the motor output.
J F Soechting, and
N A Ranish, and
R Palminteri, and
C A Terzuolo
January 1973,
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J F Soechting, and
N A Ranish, and
R Palminteri, and
C A Terzuolo
November 1996,
Brain research,
J F Soechting, and
N A Ranish, and
R Palminteri, and
C A Terzuolo
January 1992,
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J F Soechting, and
N A Ranish, and
R Palminteri, and
C A Terzuolo
November 1981,
Brain research,
J F Soechting, and
N A Ranish, and
R Palminteri, and
C A Terzuolo
January 1970,
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J F Soechting, and
N A Ranish, and
R Palminteri, and
C A Terzuolo
June 1977,
Brain research,
J F Soechting, and
N A Ranish, and
R Palminteri, and
C A Terzuolo
January 1990,
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J F Soechting, and
N A Ranish, and
R Palminteri, and
C A Terzuolo
August 2017,
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J F Soechting, and
N A Ranish, and
R Palminteri, and
C A Terzuolo
January 2003,
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J F Soechting, and
N A Ranish, and
R Palminteri, and
C A Terzuolo
August 1985,
Behavioural brain research,
