Preliminary findings suggesting cyclic changes in visual contrast sensitivity during the menstrual cycle

Visual contrast thresholds to both stationary and moving gratings of three spatial frequencies (2, 4, and 16 cyc/deg) were measured over a 32-day period in two women displaying normal menstrual cycles and in two noncycling control subjects. The time-series data of each subject in each condition were Fourier analyzed and the resulting amplitude spectra showed differences between the two sets of subjects. The spectra of the control subjects were relatively flat, whereas those of the experimental subjects showed a number of peaks at several harmonics (periods). Conservative significance tests suggested that the peaks in the spectra of the cycling women were larger than might be expected by chance. The data also suggested that changes in sensitivity were greatest for 4-cyc/deg gratings, those nearest the peak of the normal contrast sensitivity function.     

Effects of the menstrual cycle on vibrotactile sensitivity

Psychophysical thresholds for the detection of vibration delivered to the thenar eminence of the right hands of young males and females were measured every other day for 30–34 days. The frequency of the vibratory stimulus was either 15 or 250 Hz. The sinusoidal stimuli applied through a 3.0-cm² contactor were 700 msec in duration and had rise-fall times of 25 msec. Stimulus amplitude was measured with a calibrated accelerometer mounted on the moving element of the vibrator. Data were plotted as a function of successive days in the menstrual cycle. Thresholds for detecting the 15-Hz stimulus did not change significantly, whereas thresholds for detecting the 250-Hz stimulus varied significantly over the menstrual cycle. The 250-Hz threshold became progressively lower as subjects approached the onset of menstruation. After the onset of menstruation, the 250-Hz threshold gradually increased, reaching a maximum value approximately 12 or 13 days later. Soon after the 12th or 13th day of the cycle, the threshold again began to decline and continued to decline until the onset of the next menstrual cycle. The thresholds of women taking birth control pills did not change systematically over the testing period.     

Alteration of shock aversion thresholds during the menstrual cycle

Aversion thresholds for electrical shock were obtained from 5 males, 6 females who were taking oral contraceptives, and 12 females who were not. All subjects were volunteers from introductorylevel psychology courses. Measures were repeated 3 times per week for 5 weeks. Males and females taking oral contraceptives showed no cyclic fluctuations in threshold. The other female group had significant (p < .025) fluctuations in threshold, from a maximum at ovulation to a minimum 1 week after the onset of the menses.     

Variations in perception of short time intervals during menstrual cycle

The hypothesis that women experience heightened sensitivity and responsivity premenstrually was tested by asking 10 women to produce short time intervals at four phases of the menstrual cycle. 10 men were assigned to "pseudo-cycles" and tested as a control. The test was based on the assumption that a greater sensitivity to stimuli is reflected in a "slowing down" of subjective time. The women produced the shortest time intervals three to four days before menses, confirming the hypothesis.     

Physiological changes during physical and psychological stress

Changes in urine catecholamines, blood pressure and heart rate during two physical exercise test sessions (35% VO_2max and 50% VO_2max) and one psychological stress session which involved reading under delayed auditory feedback (DAF) were compared. Increases in both the haemodynamic parameters and in the excretion of catecholamines were found in response to all three tests. The changes in adrenaline (A) did not differentiate between the test situations. Noradrenaline (NA) levels were significantly larger for physical exercise conditions and graded according to the relative workload. The ratio ΔNA/ΔA was similar for both physical tests but statistically different for the DAF session. Significant and positive correlations between haemodynamic parameters and catecholamine excretion were found only for the DAF test. These correlations and the differences in catecholamine excretion suggest different bodily responses to physical and psychological stress. These findings may have practical implications in industrial field studies.     

Physiological and psychological reactivity in women with asthma: the effects of anxiety and menstrual cycle phase.

The relation between menstrual cycle timing, panic attacks, and diagnosis of asthma was explored in this study. Women with or without asthma and with or without a history of panic attacks engaged in a psychophysiological task during either the intermenstrual or premenstrual cycle phase and completed self-report measures of menstrual symptoms and attitudes, general psychological symptoms, and attitudes toward illness. No significant differences were identified for psychological or psychophysiological measures with menstrual cycle phase as a factor. However, women with both asthma and a history of panic attacks reported more general psychological distress than women in the other groups, and more state anxiety than controls. Women in the asthma, asthma and panic, and panic groups reported higher anxiety sensitivity than the control group. After listening to asthma-related scenes, women with asthma exhibited a decrease in peak expiratory air flow, and women with asthma and panic exhibited increased skin conductance response magnitude. Implications for the role of anxiety in lung function are discussed, as well as directions for future research with asthma and anxiety populations.     

Disturbed behavioural adaptability as related to reproductive hormones and emotional states during the menstrual cycle

The relationship between the incapacity to adapt behaviour to external requirements and biological irregularities of the menstrual cycle was investigated in 30 healthy females divided according to a questionnaire on behavioural adaptability into good (GAs) and bad (BAs) adaptors. Emotional states and blood samples for determination of hormones were obtained on ten defined days of the menstrual cycle, which were individually synchronized to six phases according to biological indicators. Comparison of GAs and BAs revealed that the incapacity of behavioural adaptation is associated with higher neuroticism related traits and states and that BAs exhibited higher cortisol and testosterone levels, lower luteal and follicular levels of estrogen, and lower luteal levels of progesterone. Furthermore, significantly more BA subjects suffered from corpus luteum deficiency. Results are discussed with respect to chronobiological biobehavioural mechanisms. © 1998 John Wiley & Sons, Ltd.     

Gender,psychological well-being and somatic cardiovascular risk factors

The purpose of this study is to determine associations between cardiovascular risk factors and subjective experience of psychological general well-being with special reference to gender-related differences. One hundred fifty white-collar workers in a car manufacturing plant in Sweden participated in a health care screening program. Subjective experience of psychological well-being was significantly correlated with cardiovascular risk factors among both men and women. There were, however, marked differences between the genders. For men, the following specific psychological variables were significantly correlated with cardiovascular risk factors: estimation of general health, anxiety, self-control and vitality. For women, more complex significant relationships between the two sets of variables were found. Moreover, the direction of the correlations differed between the genders. For example, men with cardiovascular risk factors, such as increased blood pressure, blood lipids and body mass index, reported significantly morepositive estimation of their general health. For women the relation was the opposite with a significantly positive correlation (p-0.004) between experience of good health and a low risk factor profile indicating the concordance between physiological and psychological parameters. Possible reasons for these sex differences are discussed.     

Men's and women's attitudes and beliefs about the menstrual cycle

Recent analyses of menstrual distress have emphasized sociocultural influences. Yet beliefs and attitudes of men—an important socialization force in the lives of women—have received little attention. In the present study, 239 students (156 females and 83 males) from three colleges filled out a survey on expectations for menstrual and premenstrual symptoms, attitudes about mensturation, sources of menstrual-related information, and effects of menstruation upon daily activities. The major findings are as follows: First, although both males and females believed women experience certain cycle-related symptoms, females reported that women experience more severe menstrual and premenstrual symptoms (when compared to intermenstrual ones) than males reported, while males believed women experience more severe menstrual than premenstrual symptoms than females believed. Second, males learned less about menstruation from the majority of possible informational sources and rated most sources as more negative than did the females. Third, males believed that menstruation had more of an effect on women's moods and had a more debilitating effect on women's lives than did females. Fourth, females rated menstruation as more bothersome than did males. Fifth, more males believed their mothers experienced menstrual irritability and moodiness, while more females believed their mothers experienced swelling. The findings are discussed in terms of the role of socialization and the type of information imparted to males and females in America today.     

Aerobic fitness, psychological characteristics, and cardiovascular reactivity to stress

Examined the relations among aerobic fitness (AF), psychological characteristics, and cardiovascular reactivity using 62 men divided into highly fit and less fit groups based on a maximal treadmill exercise test. Several psychological and physiological variables were measured, and subjects' cardiovascular reactivity was assessed during a mental arithmetic task and during a video game task. Highly fit subjects showed a significantly smaller increase in both diastolic blood pressure (DBP) and heart rate (HR) and reported themselves to be less anxious and less angry than less fit subjects. Furthermore, controlling for subjects' scores on a scale assessing angry temperament reduced the relationship between AF and DBP reactivity to nonsignificant levels. These results suggest that degree of dispositional anger, which covaries with increased fitness, may contribute to the apparent relationship between AF and DBP--but not HR--reactivity.     

The relationship between daily hassles,ways of coping,and menstrual cycle symptomatology

The purpose of this study was to investigate the relationships found among daily hassles, the use of specific coping strategies, and reported menstrual cycle symptoms. One hundred and sixty-seven female undergraduate psychology students completed a series of questionnaires assessing their most recent menstrual cycle experience, how they coped with those symptoms, and the frequency and severity of daily stressors experienced in the past month. Frequency and severity of daily hassles were positively correlated with symptoms for all phases of the menstrual cycle. A significant negative correlation was obtained between premenstrual symptoms and the use of distancing, as a coping strategy. In addition, distancing was negatively related to menstrual tension symptoms.Northwestern State University     

An attributional approach to moods and the menstrual cycle.

Acceptance of an attribution pattern linking negative moods (depression, irritability) to the approach of menstruation and the likelihood of internal and external attributions were examined in a questionnaire study in which cycle phase (pre- versus postmenstrual), mood (positive versus negative), and environment (pleasant versus unpleasant) were varied. Subjects' rating indicated that (a) biology was judged important for explaining negative moods occurring premenstrually: (b) inconsistency between mood and environment produced more internal (personality) attributions, while consistency enhanced external attributions; and (c) emotionally expressive behavior was thought to reflect underlying personality dispositions despite extenuating situational factors (assumed personal causation). The theoretical relevance of the findings to a new conceptualization of premenstrual emotionality and to an attributional chain relating female self-concept and premenstrual tension is discussed.