1.MEDULLA-it controls various involuntary actions such as Heartbeat breathing blood pressure and peristaltic movements of alimentary canal it is also the controlling Centre for reflex such as swallowing coughing sneezing secretion of saliva and vomiting 2.CEREBELLUM-cerebellum helps in maintaining posture and balance of the body it also enables us to make precise and accurate movement the cerebellum coordinates is most body movements such as walking dancing riding a bicycle and picking up a pencil3.PONS-pons take part in regulating respiration