NSCI 201 Chapter Notes - Chapter 18: Pars Compacta, Medium Spiny Neuron, Saccade
8 May 2016
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This lecture: basal ganglia, does not make contact with lower circuit neurons, modulatory role. Refer to 14. 16 for organization of neural structures. The basal ganglia is important for the facilitation of smooth, ne movements. Anatomical organisation of inputs to the basal ganglia! The striatum (c/p) has dorsal and ventral portions: ! Dorsal portions are important in motor function, ventral regions more involved with limbic system. Nearly all cortical association regions have projections to striatum this is highly anatomically precise in terms of functional representation; cortical regions with similar function will project to similar regions in the striatum. Substantia nigra pars compacta is site of dopamine projections. Idea: projections form a set of parallel processing loops. Information from cortex > subcortical regions (eg. striatum) for processing, > cortex! Next step: going from the caudate and putamen into the globus pallidus! Within caudate and putamen, there are cell regions called patches", surrounded by regions called matrix".
