[The heterosensory interaction of neurons in the cat frontal association cortex].

The interaction of various sensory inputs in the cat frontal neurons was studied in the motor cortex (MI), the area of the hind-limb contralateral representation (SI), and the area of the fore-limb contralateral representation (S'I), with the aid of heteromodal stimulation. Mutual blocks between various inputs (visual, auditory, contralateral hind-limb and fore-limb projections) were observed in MI and SI within the 100-600 msec intervals. Teleceptive inputs in the contralateral fore-limb representation did not block the somatic ones, though the latter blocked the teleceptive inputs within long intervals (3000 msec and more). The somatic input interactions manifested themselves in asymmetric blocks. The cortical type of the heterosensory block seemed to prevail in the fore-limb cortical projection, while multisynaptic blocking throughout the entire neuronal chains prevailed in the MI zone and in the cortical hind-limb projection.