Brain structure temporal cortex/regions

DA receptors include a Drlike family (I) and D5 receptors), and a D2-like family (D2, D3, and D4 receptors), which differ in their distributions on neurons (Missale et al., 1998) and their regional localization in the human brain (for reviews see Seeman, 1992 Joyce and Meador Woodruff, 1997). I), receptors show a widespread neocortical distribution, and are also present in high concentration in striatum. D5 receptors are mostly detected in the hippocampus and entorhinal cortex. D2 receptors are concentrated in the striatum, with low concentration in medial temporal structures (hippocampus, entorhinal cortex, amygdala) and thalamus. The concentration of D2 receptors in the PFC is extremely low. D3 receptors are present in the striatum, where their concentration is particularly high in the ventral striatum. D4 receptors are present in the PFC and hippocampus, but not detected in the striatum. 

Hutsler JJ. 2003. The specialized structure of human language cortex Pyramidal cell size asymmetries within auditory and language-associated regions of the temporal lobes. Brain Lang 86(2) 226-242. 

The hippocampus is a symmetrical structure located inside the medial temporal lobe on both sides of the human brain. In cross-sections, the hippocampus consists of two interlocking sheets of cortex with three distinct sub-regions the dentate gyrus, the hippocampus proper (CAl—CA3) and the subic-ulum. The hippocampus has a highly defined laminar structure with visible layers of pyramidal cells arranged in rows. A striking feature of hippocampus is its connection circuitry. 

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