[The differential effect of damage to the motor cortex on the precise reactions of avoidance and escape in dogs].
Effects of ablation of the forelimb area in the motor cortex on the precise lifting of this limb were studied. Even inaccurate avoidance reactions to the sound signal did not recover spontaneously. In the course of retraining irregular reactions of insufficient amplitude could be easily recovered but the precise reactions (both fast continuous and slow discontinuous) did not recover at least for half a year after the ablation. On the contrary, the fast precise escape reactions (to the shock applied to the "working" limb and eliciting its unconditioned flexion) remained essentially unchanged, i. a. the ability to stop movement in the correct (previously learnt) position persisted. The ability to fix position of the flexed limb retained but in was less perfect and did not improve. The ability to overcome unconditioned flexion (in order to perform discontinuous extensor escape reaction) was severely and continuously (for a year) decreased. Visually guided placings of the forepaw on a held out hand of an experimenter recovered essentially spontaneously and almost completely during a month.
Frolov
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AG
Mats
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VN
D000161:Acoustic Stimulation; D000818:Animals; D001362:Avoidance Learning / Q000502:physiology*; D003214:Conditioning, Classical / Q000502:physiology; D004285:Dogs; D004558:Electric Stimulation; D004924:Escape Reaction / Q000502:physiology*; D005552:Forelimb / Q000502:physiology; D009043:Motor Activity / Q000502:physiology; D009044:Motor Cortex / Q000502:physiology*
Razlichnoe vliianie povrezhdeniia motornoĭ oblasti kory na tochnostnye reaktsii izbeganiia i izbavleniia u sobak.