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Instrumental Conditi
Physiology of Behavior Ch 13 Neurology
Question | Answer |
---|---|
Instrumental conditioning entails the | strengthening of connections between neural circuits that detect a particular stimulus and neural circuits that produce a particular response. |
Circuits responsible for instrumental conditioning begin in _______ and and end in the ____________. | sensory association; motor association cortex of the frontal lobe. |
motor association cortex of the frontal lobe; sensory association. | |
One of the pathways between the sensory association cortex and the motor association cortex | direct transcortical connections |
One of the pathways between the sensory association cortex and the motor association cortex | connections via the basal ganglia and thalamus |
The transcortical connections are involved in the | acquisition of episodic memories |
As learned behaviors become automatic and routine, the are transferred o the | basal gnaglia |
During learning, the basal ganglia are _____ of the situation | passive "observers" |
The ___________ reveives sesory information from all fregions of the cerebral cortex | neostriatum: the caudate nucleus and the putamen |
The neostriatum includes | the caudate nucleus and the putamen. |
The outputs of the caudate nucleus and the putamen are sent to another part of the basal ganglia called the | globus pallidus |
The globus pallidus sends output to the | frontal cortex: to the premotor and supplementary motor cortex |
The frontal cortex sends information to the | primary motor cortex |
The premotor and supplementary motor cortex does what? | Makes plans for movements to be made |
The primary motor cortex does what? | Executes movements. |
Lesions of the _____ disrupt instrumental conditioning but don't affect other forms of learning. | basal ganglia |
Reinforcement is defined by a | respone to reinforcer contingency |
Contingency | rule that relates performance of an instrumental behavior to an outcome. |
James Olds and Peter Milner | attempted to determine whether electrical stimulation of the reticular formation would facilitate maze learning in rats. |
What is part of the reinforcement circuit? | Medial forebrain bundle, ventral tegmental area, and the nucleus accumbens. |
medial forebrain bundle | a bundle of axons that ravel in a rostral-caudal axis from the midbrain to the rostral basal forebrain. |
ventral tegmental area | prejects rostrally to several forebrain regions, including the amygdala, hippocampus, and nucleus accumbens. Its a group of dopaminergic neurons, axons form mesolimbic and mesocortical systems |
nucleus accumbens | a nucleus of the basal forebrain near the septum, receives dopamine-secreting terminal buttons from neurons of the ventral tegmental area and is thought to be involved in reinforcement and attention. |
Presence of natural reinforcers stimulate | the release of dopamine in the nucleus accumbens. |
Positive reinforcement is a contigent relation in which | a reinforcer increases the probablity of the response that produced it. |
Aharon et al. | found that young heterosexual men would press a lever that presented pictures of beautiful women and when they aw these pictures, the activity of the nucleus accumbens increased. |
If the activity of the nucleus accumbens increases, | the release of dopamine increases. |
Two functions of a reinforcement system | detect the presence of a reinforcing stimulus and strengthen the connections between the neurons that detect the discriminative stimulus and the neurons that producethe instrumental response. |
Reinforcement occurs when neural circuits detect a ________ and cause the activation of ____________ in the ventral tegmental area. | reinforcing stimulus; dopaminergic neurons |
Stein et al. | Hippocampal CA1 neurons containing dopamine receptors. Applied dopamine: increases behavior remove dopamine: reinforcement reapplied |