SU442791A1 - Device for producing conditioned reflexes in animals - Google Patents

Description

one

The invention relates to the field of medical technology, namely to devices for electrophysiological studies.

An automatic device for generating conditioned reflexes in animals is known, comprising a generator of triggering stimuli and a circuit for switching on stimuli.

However, the known device does not block the moment of activation of the conditioned stimulus for a predetermined time interval after the execution of the last conditioned response.

In order to block the activation of the conditional stimulus for a specified time interval after the last conditional response in the proposed device, a coincidence circuit was inserted between the trigger generator and the stimulus switch-on circuit, one of the inputs of which is connected to the output of the time-dependent signal by the animal.

The drawing shows a block diagram of the proposed device for producing conditioned reflexes in animals.

The device contains a generator of 1 stimulus start-up pulses, a coincidence circuit 2, a time relay 3 and a stimulus switching circuit 4.

The device works as follows. The signal from the trigger pulse generator 1 is fed to the circuit 4 to turn on the stimuli through the circuit 2 coincidence

only when the second potential of the time relay 3 is supplied to the second input of the coincidence circuit 2, consisting of a counter of 5 pulses with a zero-state detector, a generator of 6 clock pulses, an inverter 7 and a coincidence circuit 8. In the normal state from the relay output 3 times, the permissive potential is applied to the circuit 2 of coincidence and through the inverter 7 the inhibitory potential to the circuit 8 of coincidence, so that the pulses with

The generator 6 clock pulses are not supplied on the counter 5 pulses.

When the conditional reaction is performed by the animal 9, a signal about this is fed to the input of the pulse counter 5, and a coincidence circuit is supplied to the coincidence circuit 2 (the deciding potential and a cutting circuit to the coincidence circuit 8). The pulses from the generator 6 clock pulses are fed to the counter input 5. When the pulse of the generator 6 sets the counter 5 to the zero state, the coincidence circuit 8 closes, and the coincidence circuit 2 opens. If the animal accidentally performs a conditional reaction several more times during the exposure of a given interval, then the countdown of the predetermined interval

time begins after each reaction

at first. All this time, coincidence circuit 2 is closed and does not pass the signal of generator 1 to circuit 4 on and stimuli.

Subject invention

A device for generating conditioned reflexes in animals, comprising a generator of triggering stimuli and a circuit for switching on stimuli characterized in that.

that, in order to block the moment of activation of the conditioned irritant for a given time interval after the last conditioned response, between the stimulus start-up impulse generator, a coincidence circuit was introduced between the stimulus activation circuit, one of whose inputs is connected to the output of the time relay triggered by the conditional response animal.