IntroductionSexual desire, arousal, and orgasm are mediated by complex, yet still not fully understood, interactions of the somatic and autonomic nervous systems operating at the central and peripheral levels. Disruption of endocrine, neural, or vascular response, caused by aging, medical illness, neurological diseases, surgery, or drugs, can lead to sexual dysfunctions, thus significantly affecting patients' quality of life.PurposeThis narrative review aims at characterizing the involvement of the central nervous system in human sexual behavior.MethodsA literature search was conducted using PubMed in its entirety up to June 2018, analyzing the studies dealing with the neurobiological and neurophysiological basis of human sexuality.ResultsSexual behavior is regulated by both subcortical structures, such as the hypothalamus, brainstem, and spinal cord, and several cortical brain areas acting as an orchestra to finely adjust this primitive, complex, and versatile behavior. At the central level, dopaminergic and serotonergic systems appear to play a significant role in various factors of sexual response, although adrenergic, cholinergic, and other neuropeptide transmitter systems may contribute as well.ConclusionsProviding healthcare professionals with information concerning sexual behavior may overcome useless and sometimes dangerous barriers and improve patient management, since sexual well‐being is considered one of the most important aspects of one's quality of life.

Background Prevalence rates of sexual dysfunction (SD) in Parkinson's disease (PD) are likely to be underestimated and their etiology is still unknown. More understanding of this issue is needed. Aim To investigate prevalence of SD and its variables, including gender differences, in a sample of PD patients. Methods This multicenter observational study included 203 patients (113 males and 90 females) affected by PD (diagnosed according to UK Parkinson's Disease Society Brain Bank clinical diagnostic criteria 28), and living in 3 different Italian regions. Patients were evaluated using a semi-structured interview (a 40-item ad hoc questionnaire, developed by the authors to investigate patient's 3 main life areas: sociodemographic information, illness perception, and sexuality) and specific standardized scales to investigate SD, as well as by means of tools to assess their motor impairment, daily life activities, and disease-related caregiver burden (CBI). Main Outcome Measures The International Index of Erectile Function and the Female Sexual Function Index. Results Sexual dysfunction was observed in about 68% of men, and in around 53% of women loss of libido being the main sexual concern in both sexes. Men were significantly more affected by SD than women (χ2 (1) = 4.34, P-value = .037), but no difference in the severity of the dysfunction emerged between genders. Around 85% of PD patients had a stable couple relationship, and about 40% were satisfied with such a relationship. However, about 57% of the patients stated that the disease affected their sexual life, especially due to reduced sexual desire, and the frequency of sexual intercourses. Moreover, significant differences between subjects with SD and subjects without SD were found in UPDRS (I-II-III domains), in Hamilton Depression Rating Scale and CBI scores. Clinical Implications Clinicians dealing with PD should pay more attention to sexual issues, as discussing and treating sexual problems enters the framework of a holistic approach, which is mandatory in chronic illness. Strengths & Limitations The major strengths of this study include the multicenter nature of the study, to overcome single-center methodological bias. The main limitation is the relatively small sample size, and the absence of a control group, even if there are growing literature data on sexuality and aging supporting our findings. Conclusion SD is a highly prevalent and devastating problem in patients affected by PD, negatively affecting their quality of life.

Healthcare professionals involved in MS, should assess patients for SD. Further studies should be fostered to better quantify SD etiology, the degree of sexual impairment, and its impact on patients' quality of life to "overcome" this problem.

The aim of the study was to evaluate the prevalence and the etiology of sexual dysfunctions (SD) in a group of epileptic outpatients. Sixty Italian men (30 patients and 30 controls), living in Sicily, were enrolled in the study. Our diagnostic investigation included physical and neurological examination, EEG, MRI and Hamilton Depression and Anxiety Scales administration. A "semi-structured" questionnaire and the short form of the Sex relation Evaluation Schedule Assessment Monitoring were administered to the whole sample to evaluate their sexual well-being. There was no correlation between SD and type of epilepsy, EEG abnormalities and different antiepileptic drugs, while a weak correlation was observed between seizure frequency and the main SD. Forty-seven percent of the patients were affected by mild to moderate depression and 73.3% were anxious. Moreover, those patients who had uncontrolled seizures presented alteration in their social and affective area. Our findings showed a low prevalence of SD in epileptic male outpatients, especially concerning hyposexuality, and an important role of the seizure frequency in the multifactorial aetiology of sexual impairment in epilepsy. However, larger and multicenter studies are needed to better define the effects of epilepsy per se and the individual treatments on sexual function.