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Oury Monchi, Alexandru Hanganu, Reply: Is nucleus accumbens atrophy correlated with cognitive symptoms of Parkinson’s disease?, Brain, Volume 138, Issue 1, January 2015, Page e320, https://doi.org/10.1093/brain/awu200
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Sir, We thank Dr Mavridis for this very thoughtful comment about nucleus accumbens atrophy in patients with Parkinson’s disease from a neurosurgical point of view. Indeed it had been previously reported that dopamine loss also occurs in the nucleus accumbens of patients with Parkinson’s disease especially at the advanced stages (Farley et al., 1977). Different groups, including our own have shown that patients with Parkinson’s disease are affected differently on functions relying on the ventral versus the dorsal striatum (MacDonald et al., 2011). To the best of our knowledge, Dr Mavridis’ findings were the first to indicate in vivo that Parkinson’s disease is also associated with nucleus accumbens atrophy (Mavridis et al., 2011) and as suggested in the letter, nucleus accumbens might be associated with the neuropsychiatric non-motor symptoms that are present in the disease, like depression and anxiety (Sturm et al., 2003; Paul et al., 2005; Epstein et al., 2006). Our current results would indicate that this is the case at least for cognition (Hanganu et al., 2014).
