Monkey orbitofrontal neuron activity during emotional and feeding behaviors.

Long term, single neuron activity was recorded in the monkey orbitofrontal cortex (OBF) through chronic platinum-iridium microwire electrodes. Tonic as well as phasic changes in neuronal activity occurred upon presentation of palatable (food) and aversive stimuli during bar pressing for food. Lesions in this region are known to induce changes in emotional behavior. Therefore, the results suggest that the OBF neurons are involved in processing emotion.