Corticostriatal mechanisms of behavior

Area of Science:

• Neuroscience
• Behavioral Science
• Comparative Neurology

Background:

• Corticostriatal systems are crucial for behavior organization.
• Understanding their mechanisms requires investigating structural, neurophysiological, and mediator aspects.

Purpose of the Study:

• To investigate the structural, neurophysiological, and mediator mechanisms of corticostriatal systems in behavior.
• To explore differences in neural responses during conditioned reflex training and complex problem-solving across species.

Main Methods:

• Morphological studies of corticostriatal connections.
• Neurophysiological recordings of prefrontal cortex and caudate nucleus activity in dogs and primates.
• Neuropharmacological experiments using glutamine receptor blockers in dogs.

Main Results:

• Corticostriatal connections show both diffuse and topically organized afferent terminals.
• Dogs exhibited neuronal response transitions during conditioned reflex acquisition, while primates showed consistent specific responses.
• Glutamine receptor blockade primarily affected conditioned movement reflex development and inhibition differentiation in dogs.

Conclusions:

• The prefrontal cortex and caudate nuclei process environmental and internal state information for programmed actions and outcome assessment.
• Species-specific differences exist in neural processing during learning and complex tasks.
• Glutamine receptors in the caudate nucleus play a significant role in motor learning and behavioral adaptation.