Abstract
Summary 1. The rumination pattern has been studied in three goats before and after ablation of the orbito-frontal lobes of the cerebral cortex. 2. The animals were able to ruminate within a few hours of the cortical ablation and devoted about the same amount of time in ruminating in a day as normal animals. 3. The rumination cycle length shows an obvious irregularity following lobectomy. This irregularity of rumination cycle length is synchronised with an irregularity of reticuloruminal contractions. 4. Following lobectomy a variation in jaw movements was apparent during remastication; this disfunction may have been due to the very fluid nature of the regurgitatied food mass which was noticeable at this time. 5. The part played by the cerebrum in controlling the many and varied reflexes associated with rumination is discussed.
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