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1.  Human Structural Plasticity at Record Speed 
Neuron  2012;73(6):1058-1060.
How rapidly does learning shape our brains? A new study using diffusion magnetic resonance imaging in both humans and rats suggests that just two hours of spatial learning is sufficient to change brain structure.
PMCID: PMC3353540  PMID: 22445333
2.  What are we measuring with GABA magnetic resonance spectroscopy? 
A number of recent papers1–3 have demonstrated a relationship between in vivo concentration of GABA, as assessed using Magnetic Resonance Spectroscopy (MRS), and an individual's task performance, giving a unique insight into the relationship between physiology and behavior. However, interpretation of the functional significance of the MRS GABA measure is not straightforward. Here we discuss some of the outstanding questions as to how total concentration of GABA within a cortical region relates to phasic and tonic GABA activity within the cortical volume studied.
PMCID: PMC3204132  PMID: 22046466
gamma-amino butyric acid (GABA); motor cortex; magnetic resonance spectroscopy; human; inter-individual differences

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