Being strangled, or “choked,” by a sexual partner has emerged as a prevalent, often wanted and consensual sexual behavior among adolescent and young adult women, yet the neurological consequences of repeated exposure to this behavior are unknown. The objective of the study was to examine the association between a history of repeated, recent choking/strangling episodes during sex and fMRI activation during working memory tasks in young adult women. This case-control study involved young adult women (18–30 years old) at a large, public university, and consisted of two study groups: a choking group consisting of participants who were recently and frequently choked/strangled during sex by a partner (≥4 times in the past 30 days) and a choking-naïve (control) group who had never been choked/strangled during sex. Participants completed two variations of the N-back (0-back, 1-back, and 2-back) working memory task during functional magnetic resonance imaging (fMRI): verbal and visual N-back tasks. Data from 20 participants per group were available for analysis. Between-group differences for accuracy and reaction time were not significant for either variation of the N-back task. Significant differences in fMRI activation patterns were detected between the choking and the choking-naïve groups for the three contrasts of interest (1-back > 0-back, 2-back > 0-back, and 2-back > 1-back). The choking group exhibited increased activation in multiple clusters relative to the choking-naïve group for the contrasts between the 1-back and 2-back conditions compared to the 0-back conditions (e.g., superior frontal gyrus, corpus callosum). However, the choking-naïve group exhibited increased activation relative to the choking group in several clusters for the 2-back > 1 back contrast (e.g., splenium, middle frontal gyrus). These data indicate that recent, frequent exposure to partnered sexual strangulation is associated with different neural activation patterns during verbal and visual working memory tasks compared to controls, suggesting that being choked/strangled during sex may modify the allocation of neural resources at increasing levels of cognitive load. Further investigation into the neurologic effects of this sexual behavior is warranted, given the prevalence of sexual choking among adolescent and young adult women.

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Being choked/strangled during a partnered sex is an emerging sexual behavior, particularly prevalent among adolescent and young adult women, but the neurobiological impact of choking remains unknown. This case-control study aimed to test whether frequent choking during sex influences neurological health in young adult women, as assessed by serum levels of S100B and neurofilament-light (NfL). Participants who reported being choking ≥4 times during sex in the past 30 days were enrolled into a choking group, whereas those without were assigned to a control group. Serum samples were collected and assessed for S100B and NfL levels. Demographic questionnaires as well as alcohol use, depression, and anxiety scales were also obtained. Fifty-seven participants were enrolled initially. Due to voluntary withdrawal, phlebotomy difficulties, and scheduling conflicts, the final sample size of 32 subjects (choking n=15; control n=17) was eligible for analysis. After adjusting for a significant covariate (race), the choking group exhibited significantly elevated levels of S100B relative to controls (B=13.96 pg/mL, SE=5.41, p=0.016) but no significant group differences in NfL levels. A follow-up receiver operating characteristic analysis revealed that serum levels of S100B had very good accuracy for distinguishing between the choking and control groups [AUC=0.811, 95%CI (0.651, 0.971), p=0.0033]. Our S100B provide evidence of recurring astrocyte activation due to frequent choking while the NfL data indicate that axonal microstructural integrity may be resilient to these transient hypoxic stressors. Further clinical investigation is needed to clarify the acute and chronic neurological consequences of being choked during sex using a multimodal neurologic assessment.

IntroductionBeing choked/strangled during partnered sex is an emerging sexual behavior, particularly prevalent among young adult women. Using a multiparameter morphometric imaging approach, we aimed to characterize neuroanatomical differences between young adult women (18–30 years old) who were exposed to frequent sexual choking and their choking naïve controls.MethodsThis cross‐sectional study consisted of two groups (choking [≥4 times in the past 30 days] vs. choking‐naïve group). Participants who reported being choked four or more times during sex in the past 30 days were enrolled in the choking group, whereas those without were assigned to the choking naïve group. High‐resolution anatomical magnetic resonance imaging (MRI) data were analyzed using both volumetric features (cortical thickness) and geometric features (fractal dimensionality, gyrification, sulcal depth).ResultsForty‐one participants (choking n = 20; choking‐naïve n = 21) contributed to the final analysis. The choking group showed significantly increased cortical thickness across multiple regions (e.g., fusiform, lateral occipital, lingual gyri) compared to the choking‐naïve group. Widespread reductions of the gyrification were observed in the choking group as opposed to the choking‐naïve group. However, there was no group difference in sulcal depth. The fractal dimensionality showed bi‐directional results, where the choking group exhibited increased dimensionality in areas including the postcentral gyrus, insula, and fusiform, whereas decreased dimensionality was observed in the bilateral superior frontal gyrus and pericalcarine cortex.ConclusionThese data in cortical morphology suggest that sexual choking events may be associated with neuroanatomical alteration. A longitudinal study with multimodal assessment is needed to better understand the temporal ordering of sexual choking and neurological outcomes.

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