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Studies suggest deep brain stimulation (DBS) as a treatment modality for the refractory obsessive-compulsive disorder (OCD). It is unclear where to place the DBS. Various sites are proposed for placement with the ventral capsule/ventral striatum (VC/VS) among the most studied. Herein, we aim to summarize both quantitative Yale-Brown Obsessive-Compulsive Scale (YBOCS) data and qualitative descriptions of the participants' symptoms when given. A literature search conducted via PubMed yielded 32 articles. We sought to apply a standard based on the utilization of YBOCS. This yielded 153 distinct patients. The outcome measure we focused on in this review is the latest YBOCS score reported for each patient/cohort in comparison to the location of the DBS. A total of 32 articles were found in the search results. In total, 153 distinct patients' results were reported in these studies. Across this collection of papers, a total of 9 anatomic structures were targeted. The majority of studies showed a better response at the last time point as compared to the first time point. Most patients had DBS at nucleus accumbens followed by VC/VS and the least patients had DBS at the bilateral superolateral branch of the median forebrain bundle and the bilateral basolateral amygdala. The average YBOCS improvement did not seem to directly correlate with the percentile of patients responding to the intervention.

Well-controlled, randomized studies with larger sample sizes with close follow up are needed to provide a more accurate determination for placement of DBS for OCD.

The purpose of this paper is to investigate the effects of choice on the development and maintenance of a fruit consumption behaviour and if behaviour change was underpinned by habit strength.

A 2×2×3 mixed model experimental design was used. The independent variables were pictorial cue and fruit consumption manipulated on two levels: choice and no choice, across three-time points: baseline, post-intervention (after two weeks) and follow-up (one week later). Participants (n=166) completed demographics, the self-report habit index and fruit intake at all three-time points.

All participants showed significant increases in fruit consumption and habit strength at post-intervention and follow-up. However, participants provided neither choice of cue nor fruit showed a significant decrease in consumption at follow-up.

Fruit consumption can be significantly increased with a relatively simple intervention; choice seems to have an effect on behaviour maintenance, providing no choice negatively effects behaviour maintenance post-intervention. This may inform future interventions designed to increase fruit and vegetable consumption.

The intervention that the authors designed and implemented in the current study is the first of its kind, where choice was manipulated in two different ways and behaviour was changed with a simple environmental cue intervention.