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Wed Oct 1

• A Local Circuit Model of Learned Striatal and Dopamine Cell Responses under Probabilistic Schedules of Reward -- Tan and Bullock 28 (40): 10062 -- Journal of Neuroscience: A detailed model related to reward-predict ion errors. Basically, this model is extension of Brown et al (1999). Introduction is a nice review about related topics.
• Uncoordinated Firing Rate Changes of Striatal Fast-Spiking Interneurons during Behavioral Task Performance -- Berke 28 (40): 10075 -- Journal of Neuroscience: Based on only 36 putative FS cells in striatum, the author argues about uncoordinated spiking and against current theoretical models.

Thu Sep 25

• Understanding Overbidding: Using the Neural Circuitry of Reward to Design Economic Auctions -- Delgado et al. 321 (5897): 1849 -- Science: The social competition inherent in an auction results in a more pronounced BOLD response to loss in the striatum, with greater verbidding correlated with the magnitude of this response. Combining with behavioral data, the authors propose that loss contemplation in a social context may mediate overbidding in auction but not "joy of winning" or risk aversion. See also Maskin's Perspective.
• ECONOMICS: Can Neural Data Improve Economics? -- Maskin 321 (5897): 1788 -- Science: Maskin discusses about the final comment in Delgado's paper, namely, how neuroeconomics can help to develop new theory or model for economics. Discussion here is very deep and comprehensive. He concluded that "it is not so clear that it has yet led to a better economic model of buyers' behavior." ; I think that this is one of the biggest issue in neuroeconomics so far. We'll see.
• Emotional Regulation, or: How I Learned to Stop Worrying and Love the Nucleus Accumbens: Neuron -- Lebrecht and Badre

Sat Sep 20

• ScienceDirect - Current Opinion in Neurobiology : New insights on the subcortical representation of reward: Reward-related activity in striatum, dopamine neurons, lateral habenula, orexin neurons, amygdala, serotonin neurons, and pallidum.

Wed Sep 17

• Habits, Rituals, and the Evaluative Brain - Annual Review of Neuroscience, 31(1):359 - Full Text: "A broad spectrum of behavioral routines and rituals can become habitual and stereotyped through learning. Others have a strong innate basis. Repetitive behaviors can also appear as cardinal symptoms in a broad range of neurological and neuropsychiatr ic illness and in addictive states. This review suggests that many of these behaviors could emerge as a result of experience-dep endent plasticity in basal ganglia?based circuits that can influence not only overt behaviors but also cognitive activity. Culturally based rituals may reflect privileged interactions between the basal ganglia and cortically based circuits that influence social, emotional, and action functions of the brain."

Thu Sep 11

• Postmitotic Nkx2-1 Controls the Migration of Telencephalic Interneurons by Direct Repression of Guidance Receptors: Neuron -- Nóbrega-Pereir a et al.: Downregulation of Nkx2-1 expression in postmitotic cells is necessary for the migration of interneurons to the cortex, whereas maintenance of Nkx2-1 expression is required for interneuron migration to the striatum. Nkx2-1 exerts this role in the migration of MGE-derived interneurons by directly regulating the expression of a guidance receptor, Neuropilin-2, which enables interneurons to invade the developing striatum.
• A Time and a Place for Nkx2-1 in Interneuron Specification and Migration: Neuron -- Elias et al.: Current understanding about nkx2.1 and GABAergic neuronal specification and migration. "DLX homeobox proteins may establish general interneuronal genetic programs, while Nkx2.1 provides subtype specification. "

Tue Sep 9

• Dopamine-depen dent prediction errors underpin reward-seeking behaviour in humans : Abstract : Nature: An elegant study. Combining fMRI study with behavioral, computational and pharmacologica l experiments, the authors show that, during instrumental learning (to choose an action to get and avoid monetary reward and punishment, respectively), the magnitude of reward prediction error (based on the Q-learning) expressed in the striatum is modulated by the administation of L-DOPA or haloperidol.

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