Hypersexual behavior in frontotemporal dementia: a comparison with early-onset Alzheimer's disease

Prevalence of and Factors Associated with Hypersexuality in Patients with Dementia: A Retrospective Cross-Sectional Study

INTRODUCTION

The psychological and behavioral symptoms of dementia are frequently observed in clinical practice, and those related to sexuality are particularly challenging. However, few studies have evaluated the prevalence or factors associated with hypersexuality in patients with dementia.

OBJECTIVES

This study aims to determine the prevalence of hypersexuality in patients with dementia, describe associated factors, and qualitatively report the most common presentations and treatments.

METHODS

This retrospective cross-sectional study collected data from semi-structured charts of dementia patients who were followed up at a secondary care reference center between 2015 and 2019. Results: Of 552 total patients, 52 (9.3%) were hypersexual, which was associated with male sex (P < .000; OR 2.95, 95% CI 1.73-5.01), frontotemporal dementia (P < .007), alcohol use (P < .015; OR 2.35, 95% CI 1.16-4.73) and tobacco use (P < .000; OR 2.88, 95% CI 1.61-5.13).

CONCLUSIONS

Although our findings were similar to the literature, their significant variability reflects the limited and low quality of the available evidence and a lack of standardization regarding terminology, definitions, and diagnostic criteria for hypersexuality.

Assessment and treatment of compulsive sexual behavior disorder: a sexual medicine perspective

INTRODUCTION

The addition of compulsive sexual behavior disorder (CSBD) into the ICD-11 chapter on mental, behavioral, or neurodevelopmental disorders has greatly stimulated research and controversy around compulsive sexual behavior, or what has been termed "hypersexual disorder," "sexual addiction," "porn addiction," "sexual compulsivity," and "out-of-control sexual behavior."

OBJECTIVES

To identify where concerns exist from the perspective of sexual medicine and what can be done to resolve them.

METHODS

A scientific review committee convened by the International Society for Sexual Medicine reviewed pertinent literature and discussed clinical research and experience related to CSBD diagnoses and misdiagnoses, pathologizing nonheteronormative sexual behavior, basic research on potential underlying causes of CSBD, its relationship to paraphilic disorder, and its potential sexual health consequences. The panel used a modified Delphi method to reach consensus on these issues.

RESULTS

CSBD was differentiated from other sexual activity on the basis of the ICD-11 diagnostic criteria, and issues regarding sexual medicine and sexual health were identified. Concerns were raised about self-labeling processes, attitudes hostile to sexual pleasure, pathologizing of nonheteronormative sexual behavior and high sexual desire, mixing of normative attitudes with clinical distress, and the belief that masturbation and pornography use represent "unhealthy" sexual behavior. A guide to CSBD case formulation and care/treatment recommendations was proposed.

CONCLUSIONS

Clinical sexologic and sexual medicine expertise for the diagnosis and treatment of CSBD in the psychiatric-psychotherapeutic context is imperative to differentiate and understand the determinants and impact of CSBD and related "out-of-control sexual behaviors" on mental and sexual well-being, to detect forensically relevant and nonrelevant forms, and to refine best practices in care and treatment. Evidence-based, sexual medicine-informed therapies should be offered to achieve a positive and respectful approach to sexuality and the possibility of having pleasurable and safe sexual experiences.

Hypersexuality in neurological disorders: A systematic review

BACKGROUND

Hypersexuality (HS) accompanying neurological conditions remains poorly characterized despite profound psychosocial impacts. Objective We aimed to systematically review the literature on HS in patients with neurological disorders. Study selection and analysis We conducted a systematic review to identify studies that reported HS in neurological disorders. HS was defined as a condition characterized by excessive and persistent preoccupation with sexual thoughts, urges, and behaviors that cause significant distress or impairment in personal, social, or occupational functioning. Data on demographics, assessment techniques, associated elements, phenotypic manifestations, and management strategies were also extracted. Findings The final analysis included 79 studies on HS, encompassing 32 662 patients across 81 cohorts with neurological disorders. Parkinson's disease was the most frequently studied condition (55.6%), followed by various types of dementia (12.7%). Questionnaires were the most common assessment approach for evaluating HS, although the techniques varied substantially. Alterations in the dopaminergic pathways have emerged as contributing mechanisms based on the effects of medication cessation. However, standardized treatment protocols still need to be improved, with significant heterogeneity in documented approaches. Critical deficiencies include risks of selection bias in participant sampling, uncontrolled residual confounding factors, and lack of blinded evaluations of reported outcomes. Conclusions and clinical implications Despite growth in the last decade, research on HS remains limited across neurological conditions, with lingering quality and methodological standardization deficits. Key priorities include advancing assessment tools, elucidating the underlying neurobiology, and formulating management guidelines.

PROSPERO REGISTRATION NUMBER

CRD42017036478.

The impact of cognitive impairment in urologic implants: a narrative review

Background and Objective

With the general population aging and thus more patients developing bothersome erectile dysfunction, stress urinary incontinence and overactive bladder, there will likely be a higher demand for three common interactive implants in urology, the penile prosthesis, artificial urinary sphincter (AUS) and sacral neuromodulation (SNM). Further, the prevalence of mild and major neurocognitive disorders (also known as mild cognitive impairment and dementia, respectively) is expected to increase. While the aforementioned urologic implants have excellent short and long term outcomes, there are also known device issues such as malfunction or misuse that may require surgical removal and/or revision. The objective of this narrative review is to describe the association of cognitive impairment and urologic implants.

Methods

We performed a search on PubMed between the years 1975-2023 for English language articles that reported on any type or severity of cognitive impairment and its association with penile prosthesis, AUS and/or SNM. While peer-reviewed published manuscripts were prioritized, abstracts that fit our search criteria were also included.

Key Content and Findings

Data assessing outcomes of patients with cognitive impairment who undergo placement of a urologic implant are limited. There is an association between AUS failure or misuse with cognitive impairment. SNM is efficacious in this population in the short term. In patients who develop dementia, an inflatable penile prosthesis can be deflated via in-office needle puncture and an AUS can be deactivated. The Memory Alteration Test, Quick Screen for Mild Cognitive Impairment and the Saint Louis University Mental Status Examination are relatively quick screening tests with good sensitivity and specificity for mild cognitive impairment.

Conclusions

While data on the association between urologic implants and cognitive impairment are sparse, there are tools that urologists can use to screen patients for cognitive impairment. With screening, urologists can provide appropriate preoperative counseling (including recommending against implantation) and can provide closer postoperative monitoring. Further study is required to assess which patients should be excluded from device implantation and how to properly assess for cognitive impairment in a manner that is both beneficial for the patient and convenient and efficient for a urologist.

Correlates of Functional Impairment in Patients with the Behavioral Variant of Frontotemporal Dementia: A PRISMA-Compliant Systematic Review

The behavioral variant of frontotemporal dementia (bvFTD) has a devastating effect on multiple domains of daily living. The purpose of this PRISMA-compliant systematic review is to summarize the most important factors associated with functional impairment in this clinical group by critically analyzing the existing literature spanning the period from 2000 to 2023. To be included in the review, a study had to investigate any kind of correlates of functional status in bvFTD patients, using a previously validated instrument of functional assessment. Out of 40 articles assessed for eligibility, 18 met the inclusion criteria. The anatomical pattern of cerebral atrophy at baseline appeared to be the strongest predictor of the rate of functional decline over time, with the frontal-dominant anatomical subtype being associated with a faster rate of functional impairment. Additionally, executive dysfunction as well as apathy appeared to contribute significantly to functional disability in bvFTD patients. A comparative examination of bvFTD in relation to other clinical subtypes of FTD and other types of dementia in general suggests that it is the predominant atrophy of the frontal lobes along with the subsequent unique combination of cognitive and neuropsychiatric manifestations that account for the pronounced functional limitations observed in these individuals, even from the early stages of the disease.

The architecture of abnormal reward behaviour in dementia: multimodal hedonic phenotypes and brain substrate

Abnormal reward processing is a hallmark of neurodegenerative diseases, most strikingly in frontotemporal dementia. However, the phenotypic repertoire and neuroanatomical substrates of abnormal reward behaviour in these diseases remain incompletely characterized and poorly understood. Here we addressed these issues in a large, intensively phenotyped patient cohort representing all major syndromes of sporadic frontotemporal dementia and Alzheimer's disease. We studied 27 patients with behavioural variant frontotemporal dementia, 58 with primary progressive aphasia (22 semantic variant, 24 non-fluent/agrammatic variant and 12 logopenic) and 34 with typical amnestic Alzheimer's disease, in relation to 42 healthy older individuals. Changes in behavioural responsiveness were assessed for canonical primary rewards (appetite, sweet tooth, sexual activity) and non-primary rewards (music, religion, art, colours), using a semi-structured survey completed by patients' primary caregivers. Changes in more general socio-emotional behaviours were also recorded. We applied multiple correspondence analysis and k-means clustering to map relationships between hedonic domains and extract core factors defining aberrant hedonic phenotypes. Neuroanatomical associations were assessed using voxel-based morphometry of brain MRI images across the combined patient cohort. Altered (increased and/or decreased) reward responsiveness was exhibited by most patients in the behavioural and semantic variants of frontotemporal dementia and around two-thirds of patients in other dementia groups, significantly (P < 0.05) more frequently than in healthy controls. While food-directed changes were most prevalent across the patient cohort, behavioural changes directed toward non-primary rewards occurred significantly more frequently (P < 0.05) in the behavioural and semantic variants of frontotemporal dementia than in other patient groups. Hedonic behavioural changes across the patient cohort were underpinned by two principal factors: a 'gating' factor determining the emergence of altered reward behaviour and a 'modulatory' factor determining how that behaviour is directed. These factors were expressed jointly in a set of four core, trans-diagnostic and multimodal hedonic phenotypes: 'reward-seeking', 'reward-restricted', 'eating-predominant' and 'control-like'-variably represented across the cohort and associated with more pervasive socio-emotional behavioural abnormalities. The principal gating factor was associated (P < 0.05 after correction for multiple voxel-wise comparisons over the whole brain) with a common profile of grey matter atrophy in anterior cingulate, bilateral temporal poles, right middle frontal and fusiform gyri: the cortical circuitry that mediates behavioural salience and semantic and affective appraisal of sensory stimuli. Our findings define a multi-domain phenotypic architecture for aberrant reward behaviours in major dementias, with novel implications for the neurobiological understanding and clinical management of these diseases.

The World Federation of Societies of Biological Psychiatry guidelines on the assessment and pharmacological treatment of compulsive sexual behaviour disorder

OBJECTIVES

The current guidelines aim to evaluate the role of pharmacological agents in the treatment of patients with compulsive sexual behaviour disorder (CSBD). They are intended for use in clinical practice by clinicians who treat patients with CSBD.

METHODS

An extensive literature search was conducted using the English-language-literature indexed on PubMed and Google Scholar without time limit, supplemented by other sources, including published reviews.

RESULTS

Each treatment recommendation was evaluated with respect to the strength of evidence for its efficacy, safety, tolerability, and feasibility. Psychoeducation and psychotherapy are first-choice treatments and should always be conducted. The type of medication recommended depended mainly on the intensity of CSBD and comorbid sexual and psychiatric disorders. There are few randomised controlled trials. Although no medications carry formal indications for CSBD, selective-serotonin-reuptake-inhibitors and naltrexone currently constitute the most relevant pharmacological treatments for the treatment of CSBD. In cases of CSBD with comorbid paraphilic disorders, hormonal agents may be indicated, and one should refer to previously published guidelines on the treatment of adults with paraphilic disorders. Specific recommendations are also proposed in case of chemsex behaviour associated with CSBD.

CONCLUSIONS

An algorithm is proposed with different levels of treatment for different categories of patients with CSBD.

Behavioral Variant Frontotemporal Dementia and Social and Criminal Transgressions

OBJECTIVE

Behavioral variant frontotemporal dementia (bvFTD) is associated with social and criminal transgressions; studies from countries around the world have documented such behavior in persons with this condition. An overview and analysis of social and criminal transgressions in bvFTD and their potential neurobiological mechanisms can provide a window for understanding the relationship of antisocial behavior and the brain.

METHODS

This review evaluated the literature on the frequency of social and criminal transgressions in bvFTD and the neurobiological disturbances that underlie them.

RESULTS

There is a high frequency of transgressions among patients with bvFTD due to impairments in neurocognition, such as social perception, behavioral regulation, and theory of mind, and impairments in social emotions, such as self-conscious emotions and empathy. Additionally, there is significant evidence for a specific impairment in an innate sense of morality. Alterations in these neurobiological processes result from predominantly right-hemisphere pathology in frontal (ventromedial, orbitofrontal, inferolateral frontal), anterior temporal (amygdala, temporal pole), limbic (anterior cingulate, amygdala), and insular regions.

CONCLUSIONS

Overlapping disturbances in neurocognition, social emotions, and moral reasoning result from disease in the mostly mesial and right-sided frontotemporal network necessary for responding emotionally to others and for behavioral control. With increased sophistication in neurobiological interventions, future goals may be the routine evaluation of these processes among individuals with bvFTD who engage in social and criminal transgressions and the targeting of these neurobiological mechanisms with behavioral, pharmacological, and other interventions.

Gender Differences in Disease, Function, and Behavioral Symptoms in Residents with Dementia

The purpose of this study was to consider gender differences in depressive symptoms, agitation, resistiveness to care, physical function, and use of psychotropic medications in older adults with moderate to severe dementia in nursing homes. Sixty-seven nursing homes and 889 residents from two states were included. The majority of the participants were female (n = 640, 72%) and White (n = 618, 70%) with a mean age of 86.58 years (SD = 10.31). Differences by gender with regard to age, physical function, depressive symptoms, agitation/aggression, and resistiveness to care were tested using multivariate analysis of variance. Older females with moderate to severe dementia present with more depressive symptoms (anxiety, sadness, and somatic complaints) than males. Males present with more aggressive behavior and are more likely to receive anticonvulsants. Caregivers should focus on preventing and managing depressive symptoms including anxiety, sadness, and somatic complaints among older females and aggressive behavior in older males with dementia.

Sexuality and neurodegenerative disease: An unmet challenge for patients, care-givers and treatment

BACKGROUND

Many factors affect sexuality in the elderly such as dementia which is a common cause of inappropriate sexual behaviors. These behavioral disturbances are distressing, disruptive and impair the care of the patient. Summery: The onset of dementia does not erase sexuality. Sexual expression can be an important aspect of wellbeing for older adults with dementia. This study gives a general overview about the relationship between sexuality and cognitive impairment. It starts with a general discussion of sexual aspects in the elderly. This is followed by research studies in this field including effects of dementia on sexual life, sexuality issues related to cognitive decline, inappropriate sexual behaviors in dementia patients and sexuality in healthcare institutions. We discuss also ethical aspects in relation with sexuality and dementia. Finally, we show different approaches to treat inappropriate sexual behaviors. Key messages: The discussion of sexuality in dementia raises many medical and ethical concerns. Inappropriate sexual behaviors are estimated to occur in about 7% to 25% of demented patients. The question is how to address such a delicate subject and discuss it in an easy way without making the patient feel humiliated or mistreated. This narrative review reveals sexual problems and difficult questions encountered in daily practice with patients suffering from cognitive impairment.

Predicting disease progression in behavioral variant frontotemporal dementia

INTRODUCTION

The behavioral variant of frontotemporal dementia (bvFTD) is a rare neurodegenerative disease. Reliable predictors of disease progression have not been sufficiently identified. We investigated multivariate magnetic resonance imaging (MRI) biomarker profiles for their predictive value of individual decline.

METHODS

One hundred five bvFTD patients were recruited from the German frontotemporal lobar degeneration (FTLD) consortium study. After defining two groups ("fast progressors" vs. "slow progressors"), we investigated the predictive value of MR brain volumes for disease progression rates performing exhaustive screenings with multivariate classification models.

RESULTS

We identified areas that predict disease progression rate within 1 year. Prediction measures revealed an overall accuracy of 80% across our 50 top classification models. Especially the pallidum, middle temporal gyrus, inferior frontal gyrus, cingulate gyrus, middle orbitofrontal gyrus, and insula occurred in these models.

DISCUSSION

Based on the revealed marker combinations an individual prognosis seems to be feasible. This might be used in clinical studies on an individualized progression model.

Speech and language impairments in behavioral variant frontotemporal dementia: A systematic review

Although behavioral variant frontotemporal dementia (bvFTD) is classically defined by behavioral and socio-emotional changes, impairments often extend to other cognitive functions. These include early speech and language deficits related to the disease's core neural disruptions. Yet, their scope and clinical relevance remains poorly understood. This systematic review characterizes such disturbances in bvFTD, considering clinically, neuroanatomically, genetically, and neuropathologically defined subgroups. We included 181 experimental studies, with at least 5 bvFTD patients diagnosed using accepted criteria, comparing speech and language outcomes between bvFTD patients and healthy controls or between bvFTD subgroups. Results reveal extensive and heterogeneous deficits across cohorts, with (a) consistent lexico-semantic, reading & writing, and prosodic impairments; (b) inconsistent deficits in motor speech and grammar; and (c) relative preservation of phonological skills. Also, preliminary findings suggest that the severity of speech and language deficits might be associated with global cognitive impairment, predominantly temporal or fronto-temporal atrophy and MAPT mutations (vs C9orf72). Although under-recognized, these impairments contribute to patient characterization and phenotyping, while potentially informing diagnosis and management.

Treatment and Management of Sexual Disinhibition in Elderly Patients With Neurocognitive Disorders

Sexual disinhibition is uncommon but challenging symptom to address in elderly patients with neurocognitive disorders. Due to the lack of large-scale studies, there is no gold standard treatment for sexual disinhibition, and treatment is largely left up to the discretion of the provider based on the severity and onset of the patient's symptoms. A review was conducted to investigate the non-pharmacological and pharmacological interventions for treating this condition. Articles that discussed treatments were screened for the type of treatment and possible side effects of medication if applicable. Thorough patient history should be taken prior to starting any drug therapy to rule out possible behavioral changes due to an existing medication side effect, delirium, or past mental or sexual health history. Non-pharmacological treatment has been generally recommended as first-line therapy over pharmacological treatment. Distraction/diversion of the patient when inappropriate sexual behaviors occur was the most common non-pharmacological intervention. Antidepressants were generally recommended as the first line of pharmacological treatment after attempting all possible non-pharmacological interventions. Several other categories of interventions are discussed as well in addition to the ethical implications of treating a patient for this condition.

Frontal Pole Hypometabolism Linked to Reduced Prosocial Sexual Behaviors in Frontotemporal Dementia and Corticobasal Syndrome

BACKGROUND

Changes in sexual behaviors in frontotemporal dementia (FTD) are common and multifaceted, but not well characterized.

OBJECTIVE

To characterize changes in sexual behaviors and intimacy in FTD compared to corticobasal syndrome (CBS) and normal controls (NC), and to evaluate the neuroanatomical associations of these changes.

METHODS

Spouses of 30 FTD patients, 20 CBS patients, and 35 NC completed the Sexual Symptoms in Neurological Illness and Injury Questionnaire (SNIQ), which captures changes in sexual interest, inappropriate sexual behaviors, and prosocial sexual behaviors. 25 patients with FTD and 14 patients with CBS also received 18-flouorodeoxyglucose positron-emission topography (18FDG-PET) scans to determine the metabolic changes associated with these symptoms.

RESULTS

FTD patients showed a greater increase in inappropriate sexual behaviors than CBS patients [p = 0.009] and NC [p < 0.001] and a greater decrease in prosocial sexual behaviors than CBS patients [p = 0.026] and NC [p < 0.001]. Groups did not differ in change in sexual interest. Among both patient groups, the most common change was decreased prosocial sexual behaviors p < 0.01. Hypometabolism in Brodmann's Area 10 (BA10), within the right frontal pole, correlated with decreased prosocial sexual behaviors [p(FWE-corr) <0.05, k = 44]. No anatomical associations were found with other sexual changes.

CONCLUSION

Decreased prosocial sexual behavior was associated with hypometabolism in BA 10, an area tied to social knowledge and theory of mind, supporting the idea that changes reflect social-cognitive deficits due to frontal dysfunction.

Development of an assessment measure for sexual disinhibition in dementia

OBJECTIVE

Sexual disinhibition (SD), a neuropsychiatric symptom characterized by sexually inappropriate comments and/or behaviors, remains under identified in dementia, possibly due to a lack of standardized assessment methods. A recent systematic review of measures used to assess SD proposed four behavioral domains and identified the need for a population-specific measure. The present study addressed this by examining the underlying factor structure of SD to create a new caregiver-report measure.

METHODS

Dementia caregivers (n = 622) recruited online were randomly assigned to Initial Validation (n = 311) or Cross-Validation (n = 311) groups.

RESULTS

Initial Validation revealed five behavioral domains that served as provisional scales for cross-validation, leading to measure development.

CONCLUSIONS

The current study is the first to statistically evaluate the underlying factor structure of SD, resulting in a new measure that can help better characterize and identify SD.

Elevated Testosterone Level and Urine Scent Marking in Male 5xFAD Alzheimer Model Mice

BACKGROUND

Function of the Amyloid Precursor Protein (AβPP) and its various cleavage products still is not unraveled down to the last detail. While its role as a source of the neurotoxic Amyloid beta (Aβ) peptides in Alzheimer's Disease (AD) is undisputed and its property as a cell attachment protein is intriguing, while functions outside the neuronal context are scarcely investigated. This is particularly noteworthy because AβPP has a ubiquitous expression profile and its longer isoforms, AβPP750 and 770, are found in various tissues outside the brain and in non-neuronal cells.

OBJECTIVE

Here, we aimed at analyzing the 5xFAD Alzheimer's disease mouse model in regard to male sexual function. The transgenes of this mouse model are regulated by Thy1 promoter activity and Thy1 is expressed in testes, e.g. by Sertoli cells. This allows speculation about an influence on sexual behavior.

METHODS

We analyzed morphological as well as biochemical properties of testicular tissue from 5xFAD mice and wild type littermates and testosterone levels in serum, testes and the brain. Sexual behavior was assessed by a urine scent marking test at different ages for both groups.

RESULTS

While sperm number, testes weight and morphological phenotypes of sperms were nearly indistinguishable from those of wild type littermates, testicular testosterone levels were significantly increased in the AD model mice. This was accompanied by elevated and prolonged sexual interest as displayed within the urine scent marking test.

CONCLUSION

We suggest that overexpression of AβPP, which mostly is used to mimic AD in model mice, also affects male sexual behavior as assessed additional by the Urine Scent Marking (USM) test. The elevated testosterone levels might have an additional impact on central nervous system androgen receptors and also have to be considered when assessing learning and memory capabilities.

Hypothalamic symptoms of frontotemporal dementia disorders

Frontotemporal dementia (FTD) has traditionally been regarded as a disease of cognition and behavior, but emerging evidence suggests that the disease also affects body functions including changes in eating behavior and metabolism, autonomic function, sleep behavior, and sexual function. Central to these changes are potentially complex neural networks involving the hypothalamus, with hypothalamic atrophy shown in behavioral variant FTD. The physiological changes found in FTD are reviewed and the key neural networks and neuroendocrine changes mediating these changes in function discussed, including the ability to use these changes as biomarkers to aid in disease diagnosis, monitoring disease progression, and as potential treatment targets.

Cognitive and behavioural inhibition deficits in neurodegenerative dementias

Disinhibition, mainly caused by damage in frontotemporal brain regions, is one of the major causes of caregiver distress in neurodegenerative dementias. Behavioural inhibition deficits are usually described as a loss of social conduct and impulsivity, whereas cognitive inhibition deficits refer to impairments in the suppression of prepotent verbal responses and resistance to distractor interference. In this review, we aim to discuss inhibition deficits in neurodegenerative dementias through behavioural, cognitive, neuroanatomical and neurophysiological exploration. We also discuss impulsivity and compulsivity behaviours as related to disinhibition. We will therefore describe different tests available to assess both behavioural and cognitive disinhibition and summarise different manifestations of disinhibition across several neurodegenerative diseases (behavioural variant of frontotemporal dementia, Alzheimer's disease, Parkinson's disease, progressive supranuclear palsy, Huntington's disease). Finally, we will present the latest findings about structural, metabolic, functional, neurophysiological and also neuropathological correlates of inhibition impairments. We will briefly conclude by mentioning some of the latest pharmacological and non pharmacological treatment options available for disinhibition. Within this framework, we aim to highlight i) the current interests and limits of tests and questionnaires available to assess behavioural and cognitive inhibition in clinical practice and in clinical research; ii) the interpretation of impulsivity and compulsivity within the spectrum of inhibition deficits; and iii) the brain regions and networks involved in such behaviours.

Establishing Canadian metrics for self-report measures used to assess hypersexuality

We examined the prevalence of hypersexuality in two combined Canadian adult community samples totalling 1,857 respondents (female n = 960, male n = 835, other n = 60, missing n = 2). Participants were recruited from social media to complete an online sexual behaviour survey that included two measures of compulsive sexual behaviour disorder— the Sexual Compulsivity Scale (SCS) and Hypersexual Behaviour Inventory (HBI)—as well as sexual behaviour and interest items. Respondents also reported their total sexual outlets (TSO)—defined by number of orgasms experienced weekly—as a third potential indicator of hypersexuality. Canadian men and women reported multiple sexual outlets per week that tended to be higher than previous reports. Men tended to report a larger number and higher frequency of various sexual behaviour than women, including higher rates of compulsive sexual behaviour disorder, which varied depending on the measure employed. Implications for establishing sexuality norms and conceptualizing hypersexuality and compulsive sexual behaviour disorder are discussed.

A Critical Review of Behavioral and Emotional Disinhibition

The theory of "disinhibition" has been very influential in psychiatry and neurology for over a century. Disinhibition has been used to explain clinical findings in many neurological and psychiatric disorders including dementia, traumatic brain injury, attention deficit hyperactive disorder, substance abuse, impulsivity in personality disorders, and neurodevelopmental disorders. In addition, disinhibition has been used as a unifying theory to link clinical observations with cognitive findings, and even cellular findings. This review discusses the origins and history of the theory of disinhibition and its strengths and weaknesses in four domains: face validity, consistency with other brain mechanisms, consistency with evolutionary mechanisms, and empiric support. I assert that the vagueness of the theory, inconsistency with other brain mechanisms, and lack of empiric support limit the usefulness of this theory. Alternative approaches, based on findings in other motor, language, and cognitive functions, are discussed.

Age-dependent emergence of neurophysiological and behavioral abnormalities in progranulin-deficient mice

Background

Loss-of-function mutations in the progranulin gene cause frontotemporal dementia, a genetic, heterogeneous neurodegenerative disorder. Progranulin deficiency leads to extensive neuronal loss in the frontal and temporal lobes, altered synaptic connectivity, and behavioral alterations.

Methods

The chronological emergence of neurophysiological and behavioral phenotypes of Grn heterozygous and homozygous mice in the dorsomedial thalamic—medial prefrontal cortical pathway were evaluated by in vivo electrophysiology and reward-seeking/processing behavior, tested between ages 3 and 12.5 months.

Results

Electrophysiological recordings identified a clear age-dependent deficit in the thalamocortical circuit. Both heterozygous and homozygous mice exhibited impaired input-output relationships and paired-pulse depression, but evoked response latencies were only prolonged in heterozygotes. Furthermore, we demonstrate firstly an abnormal reward-seeking/processing behavior in the homozygous mice which correlates with previously reported neuroinflammation.

Conclusion

Our findings indicate that murine progranulin deficiency causes age-dependent neurophysiological and behavioral abnormalities thereby indicating their validity in modeling aspects of human frontotemporal dementia.

Psychological and Cognitive Markers of Behavioral Variant Frontotemporal Dementia-A Clinical Neuropsychologist's View on Diagnostic Criteria and Beyond

Behavioral variant frontotemporal dementia (bvFTD) is the second leading cognitive disorder caused by neurodegeneration in patients under 65 years of age. Characterized by frontal, insular, and/or temporal brain atrophy, patients present with heterogeneous constellations of behavioral and psychological symptoms among which progressive changes in social conduct, lack of empathy, apathy, disinhibited behaviors, and cognitive impairments are frequently observed. Since the histopathology of the disease is heterogeneous and identified genetic mutations only account for ~30% of cases, there are no reliable biomarkers for the diagnosis of bvFTD available in clinical routine as yet. Early detection of bvFTD thus relies on correct application of clinical diagnostic criteria. Their evaluation however, requires expertise and in-depth assessments of cognitive functions, history taking, clinical observations as well as caregiver reports on behavioral and psychological symptoms and their respective changes. With this review, we aim for a critical appraisal of common methods to access the behavioral and psychological symptoms as well as the cognitive alterations presented in the diagnostic criteria for bvFTD. We highlight both, practical difficulties as well as current controversies regarding an overlap of symptoms and particularly cognitive impairments with other neurodegenerative and primary psychiatric diseases. We then review more recent developments and evidence on cognitive, behavioral and psychological symptoms of bvFTD beyond the diagnostic criteria which may prospectively enhance the early detection and differential diagnosis in clinical routine. In particular, evidence on specific impairments in social and emotional processing, praxis abilities as well as interoceptive processing in bvFTD is summarized and potential links with behavior and classic cognitive domains are discussed. We finally outline both, future opportunities and major challenges with regard to the role of clinical neuropsychology in detecting bvFTD and related neurocognitive disorders.

The cognitive aspects of sexual intimacy in dementia patients: a neurophysiological review

Changes in higher-order cognitive behaviors such as reward recognition, salience processing, novelty perception, decision-making, emotional contagion, motivation, and empathy may contribute to intimacy dysfunction. Network circuitry underlying these cognitive functions is often activated in sexually intimate behavior. We propose that sexual dysfunction in AD and bvFTD is more nuanced than is commonly believed, and propose how AD and bvFTD atrophy may correlate neuroanatomically to brain regions and networks that contribute to the higher-order cognitive aspects of intimacy. The characterization of sexual intimacy in dementias must be expanded to meet the needs of our dementia patients and their romantic partners.

Establishing dimensionality of sexual behaviours in patients with regional brain dysfunction

OBJECTIVE

To develop a validated, caregiver-based measurement scale to assess sexual changes across several domains in a sample of 86 patients with penetrating traumatic brain injury (TBI) and 65 patients with neurodegeneration due to frontotemporal dementia and corticobasal syndrome.

METHODS

A new measure, the Sexual Symptoms in Neurological Illness and Injury Questionnaire (SNIQ), was constructed. Dimensionality, monotonicity, item discrimination power, and scalability were evaluated using nonparametric Mokken item response theory (IRT) methodology.

RESULTS

Three primary domains were established. The domains presented with sufficient reliability (rho .70 to .80), while meeting the Mokken IRT criteria of medium scalability. The domains were labeled 'Prosocial sexual behaviour' (H = .42), 'Sexual interest' (H = .50), and 'Inappropriate sexual behaviour' (H = .41). A fourth dimension emerged, 'Detachment' (H = .47), but with very few items.

CONCLUSIONS

Construct validity was established for groups of items pertaining to three unique aspects of sexuality. These findings support further use of the SNIQ in assessing and researching sexual behaviours in patients with dementia and brain injury.

Aripiprazole for the Treatment of Inappropriate Sexual Behavior: Case Report of an Alzheimer's Disease Patient Known as Heterosexual with Recently Shifted Sexual Orientation to Same Gender

Although inappropriate sexual behavior in dementia is not common, it can be extremely troublesome for healthcare professionals and caregivers as well as patients themselves. There is paucity of data in the literature for the management of these behaviors, but the limited available data suggest efficiency of some commonly used treatment modalities. Herein, we present a 74-year old Alzheimer’s disease (AD) patient, known to be heterosexual throughout her past life, presenting with a recent display of same-sex inappropriate sexual behavior six years after the initial diagnosis of her disease. This new clinical picture of hypersexuality responded well to aripiprazole and her symptoms gradually diminished and eventually disappeared after onset of medication. This report also constitutes the first reported case of an AD patient in the published literature presenting with hypersexuality of shifted sexual orientation during the course of the disease.

Hypersexuality: A Critical Review and Introduction to the "Sexhavior Cycle"

An empirical review of hypersexuality is timely as "compulsive sexual behavior" is being considered as an impulse control disorder for inclusion in the forthcoming International Classification of Diseases, 11th ed. Specifically, hypersexuality has been conceptualized in the literature as the inability to regulate one's sexual behavior that is a source of significant personal distress. Various theoretical models have been posited in an attempt to understand the occurrence of hypersexuality, although disagreement about these divergent conceptualizations of the condition has made assessment and treatment of hypersexual clients more challenging. Theories of sexual compulsivity, sexual impulsivity, dual control (sexual inhibition/excitation), and sex addiction are critically examined, as are the diagnostic criteria for clinically assessing hypersexuality as a sexual disorder. Our discussion of hypersexuality covers a diversity of research and clinical perspectives. We also address various challenges associated with reliably defining, psychometrically measuring, and diagnosing hypersexuality. Furthermore, literature is reviewed that expresses concerns regarding whether hypersexuality (conceptualized as a disorder) exists, whether it is simply normophilic behavior at the extreme end of sexual functioning, or alternatively is a presenting problem that requires treatment rather than a clinical diagnosis. Following our literature review, we developed the "sexhavior cycle of hypersexuality" to potentially explain the neuropsychology and maintenance cycle of hypersexuality. The sexhavior cycle suggests that, for some hypersexual persons, high sexual arousal may temporarily and adversely impact cognitive processing (cognitive abeyance) and explain a repeated pattern of psychological distress when interpreting one's sexual behavior (sexual incongruence). We also suggest that further research is required to validate whether hypersexuality is a behavioral disorder (such as gambling), although some presentations of the condition appear to be symptomatic of a heterogeneous psychological problem that requires treatment.

Relations Between Self-Reported Adverse Events in Childhood and Hypersexuality in Adult Male Sexual Offenders

Hypersexuality, or extreme normophilic sexual urges and behaviors, is a controversial construct that was recently considered as a candidate disorder for the DSM-5 and was rejected. It was also rejected for inclusion in Section III (Conditions for Further Study). Nonetheless, it has been found to be an important predictor of recidivism among sex offenders, and it continues to be discussed widely in the literature. In the present study, we investigated the developmental roots of this construct in a sample of 529 adult male sexual offenders, who were administered the Multidimensional Assessment of Sex and Aggression. Physical, psychological, and sexual abuse experiences were estimated using several scales of early development. Psychological abuse in childhood and adolescence, especially by a father, was found to be the most prominent predictor of subsequent hypersexual thoughts and behaviors. The accumulation of abuse types, however, was also associated with a monotonic increase in the latent trait of hypersexuality. The consequences of these results for conceptualizations of the construct are discussed.

Inappropriate behaviors and hypersexuality in individuals with dementia: An overview of a neglected issue

Behavioral and psychological symptoms of dementia are very common in patients affected by dementia, and are associated with high rates of institutionalization. Behavioral and psychological symptoms of dementia consist of aggressive behavior, delusions, hallucinations, depression, apathy, wandering, stereotyped and inappropriate sexual behavior. Interestingly, the latter has been reported to be relatively uncommon, but causing immense distress to patients and their caregivers. The genesis of inappropriate behavior is considered a combination of neurological, psychological and social factors. Although assessment is mainly carried out by clinical observation and interviews with caregivers, the most appropriate management of behavioral and psychological symptoms of dementia, including hypersexuality, is a combination of pharmacological and non-pharmacological interventions, according to specific symptoms, degree of cognitive dysfunction and subtype of dementia. The present narrative review will mainly focus on aggressiveness, disinhibition, aberrant motor, and sexually inappropriate behavior diagnostic work-up and treatment, in an attempt to provide both the patients and their caregivers with useful information to better manage these symptoms and improve their quality of life. Space is particularly dedicated to inappropriate sexual behavior, which is still considered a neglected issue. Geriatr Gerontol Int 2017; 17: 865-874.

Sexual Consent Capacity Assessment with Older Adults

Many healthcare providers have a limited knowledge of sexual and intimate expression in later life, often due to attitudinal and informational limitations. Further, the likelihood of an older adult experiencing cognitive decline increases in a long-term care (LTC) setting, complicating the ability of the providers to know if the older adult can make his or her own sexual decisions, or has sexual consent capacity. Thus, the team is left to question if and how to support intimacy and/or sexuality among residents with intimacy needs. Psychologists working with LTC need to be aware and knowledgeable about sexual consent capacity in older adulthood to be prepared to conduct evaluations and participate in planning care. Limited research is available to consult for best practices in sexual consent capacity assessment; however, models of assessment have been developed based on the best available evidence, clinical judgment, and practice. Existing models will be discussed and an integrated model will be illustrated via a case study.

Elderly Sexual Offenders

With the ever-aging population, the number of elderly sexual offenders are also on the rise. The courts and correctional system are increasingly faced with older individuals who have offended sexually. Previously, these older offenders were thought to be similar to younger sexual offenders. However, closer analysis suggests that many of these individuals pose a much lower risk to recidivate than the risk to recidivate of their younger counterparts. Still, an individualized approach to manage the risk of older offenders is required, as some may have particular risk factors relevant for their treatment and future stability, such as dementia or other mental health issues. Further, this population often has particular physical health issues and requires special consideration when being placed in the community. Assessment, treatment, and risk management in this special population of sexual offenders are discussed.

Increased libido associated with donepezil treatment: a case report

Inappropriate verbal and physical sexual behaviour is not common among individuals with dementia, but when it does occur, it can have profound consequences. We report a case of 79-year-old woman with dementia of the Alzheimer's type who complained of increased libido after an increased dose of donepezil, which was being used along with tianeptine. Donepezil withdrawal led to the resolution of increased libido, but when it was reintroduced, increased libido reappeared once again (Naranjo score: 7). Increased libido was not reported by the patient during the 6-year follow-up period after donepezil withdrawal. A potential mechanism of acetylcholinesterase inhibitor-induced increased libido and the current literature on hypersexuality as a side-effect of donepezil treatment are discussed.

Auditory hedonic phenotypes in dementia: A behavioural and neuroanatomical analysis

Patients with dementia may exhibit abnormally altered liking for environmental sounds and music but such altered auditory hedonic responses have not been studied systematically. Here we addressed this issue in a cohort of 73 patients representing major canonical dementia syndromes (behavioural variant frontotemporal dementia (bvFTD), semantic dementia (SD), progressive nonfluent aphasia (PNFA) amnestic Alzheimer's disease (AD)) using a semi-structured caregiver behavioural questionnaire and voxel-based morphometry (VBM) of patients' brain MR images. Behavioural responses signalling abnormal aversion to environmental sounds, aversion to music or heightened pleasure in music (‘musicophilia’) occurred in around half of the cohort but showed clear syndromic and genetic segregation, occurring in most patients with bvFTD but infrequently in PNFA and more commonly in association with MAPT than C9orf72 mutations. Aversion to sounds was the exclusive auditory phenotype in AD whereas more complex phenotypes including musicophilia were common in bvFTD and SD. Auditory hedonic alterations correlated with grey matter loss in a common, distributed, right-lateralised network including antero-mesial temporal lobe, insula, anterior cingulate and nucleus accumbens. Our findings suggest that abnormalities of auditory hedonic processing are a significant issue in common dementias. Sounds may constitute a novel probe of brain mechanisms for emotional salience coding that are targeted by neurodegenerative disease.

Sexuality in patients with Parkinson's disease, Alzheimer's disease, and other dementias

Sexual dysfunction (SD) is common among patients with Parkinson's disease (PD), Alzheimer's disease (AD), and other dementias. Sexual functioning and well-being of patients with PD and their partners are affected by many factors, including motor disabilities, non-motor symptoms (e.g., autonomic dysfunction, sleep disturbances, mood disorders, cognitive abnormalities, pain, and sensory disorders), medication effects, and relationship issues. The common sexual problems are decreased desire, erectile dysfunction, difficulties in reaching orgasm, and sexual dissatisfaction. Hypersexuality is one of a broad range of impulse control disorders reported in PD, attributed to antiparkinsonian therapy, mainly dopamine agonists. Involvement of a multidisciplinary team may enable a significant management of hypersexuality. Data on SD in demented patients are scarce, mainly reporting reduced frequency of sex and erectile dysfunction. Treatment of SD is advised at an early stage. Behavioral problems, including inappropriate sexual behavior (ISB), are distressing for patients and their caregivers and may reflect the prevailing behavior accompanying dementia (disinhibition or apathy associated with hyposexuality). The neurobiologic basis of ISB is still only vaguely understood but assessment and intervention are recommended as soon as ISB is suspected. Management of ISB in dementia demands a thorough evaluation and understanding of the behavior, and can be treated by non-pharmacologic and pharmacologic interventions.

A man with urethral polyembolokoilamania successfully treated with electroconvulsive therapy

Polyembolokoilamania is the act of inserting foreign objects into bodily orifices and can be classified as a paraphilia if done for sexual pleasure. Although problematic sexual behaviors are common in dementia, the majority of case reports of urethral polyembolokoilamania in the elderly have occurred in the absence of dementia or cognitive impairment. Little empirical evidence exists for managing problematic sexual behaviors in the elderly and in dementia. Most evidence in the form of case reports demonstrates that behavioral, environmental, and pharmacological interventions can be effective. In this case report, we describe the management of sexually disinhibited behavior in the form of polyembolokoilamania in a 67-year-old man suffering from treatment-resistant depression, obsessive compulsive disorder, and early signs of frontotemporal dementia. The successful treatment included a course of electroconvulsive therapy.

Anatomical correlates of reward-seeking behaviours in behavioural variant frontotemporal dementia

Behavioural variant frontotemporal dementia is characterized by abnormal responses to primary reward stimuli such as food, sex and intoxicants, suggesting abnormal functioning of brain circuitry mediating reward processing. The goal of this analysis was to determine whether abnormalities in reward-seeking behaviour in behavioural variant frontotemporal dementia are correlated with atrophy in regions known to mediate reward processing. Review of case histories in 103 patients with behavioural variant frontotemporal dementia identified overeating or increased sweet food preference in 80 (78%), new or increased alcohol or drug use in 27 (26%), and hypersexuality in 17 (17%). For each patient, a primary reward-seeking score of 0-3 was created with 1 point given for each target behaviour (increased seeking of food, drugs, or sex). Voxel-based morphometry performed in 91 patients with available imaging revealed that right ventral putamen and pallidum atrophy correlated with higher reward-seeking scores. Each of the reward-related behaviours involved partially overlapping right hemisphere reward circuit regions including putamen, globus pallidus, insula and thalamus. These findings indicate that in some patients with behavioural variant frontotemporal dementia, low volume of subcortical reward-related structures is associated with increased pursuit of primary rewards, which may be a product of increased thalamocortical feedback.

Erectile dysfunction in the elderly: an old widespread issue with novel treatment perspectives

Erectile dysfunction (ED) is one of the most common chronic diseases affecting men and its prevalence increases with aging. It is also the most frequently diagnosed sexual dysfunction in the older male population. A number of different diseases potentially worsening sexual function may occur in elderly people, together with polypharmacy. Related causes of ED are variable and can include arterial, neurogenic, hormonal, cavernosal, iatrogenic, and psychogenic causes. The aim of the present review was to examine the main aspects of erectile dysfunction going through epidemiology and pathophysiology and revise most of ED in elderly disabled men and in those affected with psychiatric disorders. Lastly we tried to focus on the main aspects of nonpharmacological and pharmacological treatments of ED and the recreational use in the elderly. Phosphodiesterase-5 inhibitors (PDE5-I) are commonly used for on-demand or chronic treatment of ED. It is widely known that PDE5-I have lower response rates in older men than in younger patients, but they have the advantages of ease of use and excellent safety profile, also in the elderly. The old and new PDE5-I as well as the alternative treatments for ED are extensively discussed.

Influence of cognitive decline on sexuality in individuals with dementia and their caregivers

Sexuality is an important element of human life that is strongly influenced by the social environment. People assess themselves and relate their roles to one another in terms of sexuality. More attention must be directed at the sexual needs of individuals with dementia and their caregivers. A myth believed by society is that individuals with dementia are asexual and that sexual desires and needs for connection will wane over time; whereas in reality many couples living with dementia remain sexually active as the disease progresses. The sexual needs of individuals with dementia are similar to those of younger people but might vary in occurrence and expression. An increase or decline in sexual desire is dependent on the level of cognitive impairment. Sexuality in individuals with dementia may be expressed as inappropriate or hypersexual behavior due to disinhibition and forgetting social cues. Although hypersexuality is often less common than other challenging behaviors that can occur in dementia, it affects both the health of the individual with dementia and the health of his or her caregiver.

Structural neuroimaging of social cognition in progressive non-fluent aphasia and behavioral variant of frontotemporal dementia

Social cognition impairments are pervasive in the frontotemporal dementias (FTD). These deficits would be triggered by (a) basic emotion and face recognition processes as well as by (b) higher level social cognition (e.g., theory of mind, ToM). Both emotional processing and social cognition impairments have been previously reported in the behavioral variant of FTD (bvFTD) and also in other versions of FTDs, including primary progressive aphasia. However, no neuroanatomic comparison between different FTD variants has been performed. We report selective behavioral impairments of face recognition, emotion recognition, and ToM in patients with bvFTD and progressive non-fluent aphasia (PNFA) when compared to controls. Voxel-based morphometry (VBM) shows a classical impairment of mainly orbitofrontal (OFC), anterior cingulate (ACC), insula and lateral temporal cortices in patients. Comparative analysis of regional gray matter related to social cognition deficits (VBM) reveals a differential pattern of fronto-insulo-temporal atrophy in bvFTD and an insulo-temporal involvement in PNFA group. Results suggest that in spite of similar social cognition impairments reported in bvFTD and PNFA, the former represents an inherent ToM affectation whereas in the PNFA these deficits could be related to more basic processes of face and emotion recognition. These results are interpreted in the frame of the fronto-insulo-temporal social context network model (SCNM).

A treatment-oriented typology of self-identified hypersexuality referrals

Men and women have been seeking professional assistance to help control hypersexual urges and behaviors since the nineteenth century. Despite that the literature emphasizes that cases of hypersexuality are highly diverse with regard to clinical presentation and comorbid features, the major models for understanding and treating hypersexuality employ a "one size fits all" approach. That is, rather than identify which problematic behaviors might respond best to which interventions, existing approaches presume or assert without evidence that all cases of hypersexuality (however termed or defined) represent the same underlying problem and merit the same approach to intervention. The present article instead provides a typology of hypersexuality referrals that links individual clinical profiles or symptom clusters to individual treatment suggestions. Case vignettes are provided to illustrate the most common profiles of hypersexuality referral that presented to a large, hospital-based sexual behaviors clinic, including: (1) Paraphilic Hypersexuality, (2) Avoidant Masturbation, (3) Chronic Adultery, (4) Sexual Guilt, (5) the Designated Patient, and (6) better accounted for as a symptom of another condition.