The Influence of Negative Expectancies on Itch-related Avoidance Behavior.

BackgroundExpectations determine treatment outcomes in several medical conditions. The significance of expectations for treatment outcomes in patients with endometriosis remains unknown. Endometriosis is a painful and debilitating disease that negatively affects quality of life. Up to 30% of surgically treated patients report persistent post-operative complaints and pain disability without sufficient medical explanation, indicating the impact of non-medical factors on treatment outcomes.AimThe present qualitative study aimed to describe and understand pre-operative patient expectations, facilitators of and barriers to positive treatment outcomes.MethodAs part of a large mixed-method cohort study, a subsample of N = 33 patients with endometriosis were interviewed before laparoscopy. Structured content analysis was performed.ResultsPositive expectations included significant improvement or absence of complaints, receiving a diagnosis, and subsequently improved health-related quality of life. However, patients also reported negative expectations such as invalidation of their experience, persistence of complaints, or post-operative side effects. Patients perceived positive expectations as facilitators for positive treatment outcomes. Further facilitators included enhanced patient and treatment information, gynaecologists specialized in endometriosis, and greater awareness of endometriosis. Perceived barriers to good post-operative quality of life included post-operative pain and scarring, insufficient rest, avoidance behaviour, and stress.ConclusionPositive and negative expectations coexisted. Positive expectations suggest that participants place much hope in laparoscopy. However, these positive expectations may exceed probable treatment outcomes for some patients. Negative expectations were also expressed and constituted a risk for nocebo effects. Further identified facilitators and barriers show that patients are very clear about what is helpful or not for their health-related quality of life after laparoscopy. Patient and treatment information may be enhanced to prevent unrealistic treatment expectations and nocebo effects.

Learner individual differences can play differential roles in learners’ performance on different task types of different complexity levels. This study investigates the differential role of domain-specific anxiety in second language (L2) learners’ performances on narrative and argumentative writing tasks. For this purpose, a group of 102 upper-intermediate L2 learners in Iran were asked to perform either a narrative or an argumentative writing task. The study also involved the measurement of learners’ L2 writing anxiety using the Second Language Writing Anxiety Inventory (SLWAI) that represents somatic anxiety (negative feelings such as tension), cognitive anxiety (negative expectations, preoccupation with performance) and avoidance behavior (avoidance in writing). Moreover, the quality of learners’ writings was assessed by eliciting three measures of task performance, i.e. Complexity (clauses per T-unit and dependent clauses percentage), Accuracy (error-free clauses and T-units percentage) and Fluency (average number of words, T-units and clauses per text). Regarding the narrative task, negative relationships were found between cognitive anxiety and both accuracy measures; further, a significant negative correlation was found between somatic anxiety and an accuracy measure of narrations. On the contrary, the effect of writing anxiety on argumentative task performance was more extensive: negative correlations were observed between cognitive anxiety and all three measures of fluency, one complexity measure and one accuracy measure; avoidance behavior was also negatively associated with two fluency measures and one complexity measure. The implications of the study are discussed.

Assessment of pubertal maturity in boys, using height and grip strength

Nocebo effects, i.e. reduced treatment effects due to patients' negative expectations, play a role in itch. Recent studies have shown that nocebo effects can be induced experimentally on itch and also be minimized and even turned into the opposite direction, i.e. placebo effects. It is not known whether these effects generalize to itch-associated scratching behaviour. The aim of this study was to determine whether induction and reversal of nocebo effects on itch evoked by electrical and histamine stimuli generalized to scratching. Ninety-seven healthy participants were included in the study. The manipulation was successful, as during the nocebo learning phase, increased scratching responses were found for higher intensity compared with lower intensity itch stimuli. During the testing phase of induction or reversal of the nocebo effects, however, no significant nocebo effects or reversed nocebo effects, were found in scratching. Thus, no straightforward generalization of nocebo effects from itch to scratching was found in this laboratory setting. Further investigation into possible generalization is needed in different settings and in patients with chronic itch.

Research on stereotype formation has proposed a variety of reasons for how inaccurate stereotypes arise, focusing largely on accounts of motivation and cognitive efficiency. Here, we instead consider how stereotypes arise from basic processes of approach and avoidance in social learning. Across five studies, we show that initial negative interactions with some members of a group can cause subsequent avoidance of the entire group, and that this avoidance perpetuates stereotypes in two ways. First, when information gain is contingent on approaching the target, avoidance restricts the information available with which to update one's beliefs. Second, computational models that consider the perceiver's full reinforcement history demonstrate that avoidance directly reinforces itself, such that initial avoidance of group members increases the probability of later acts of avoidance toward that group. Finally, we find initial evidence for a potential dissociation between behavior and explicit beliefs, with avoidance reinforcing avoidant behaviors without necessarily affecting self-reported beliefs. Overall, these results suggest that avoidance behaviors toward members of social groups can perpetuate inaccurate negative beliefs and expectations about those groups, such that initial interactions with a group have a compounding effect on overall impressions. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Attention and nocebo hyperalgesia: Testing a novel virtual reality attention bias modification paradigm

Measurement of grip strength is an important component in hand evaluation. It assesses the patient's initial limitations and provides a quick reassessment of patient's progress throughout the treatment. This investigation was conducted to examine the determinants of hand dominance of average versus maximum grip strength, body mass index (BMI) and age for hand evaluation. Subjects were 877 apparently healthy male adult volunteers from the Inonu University – students and personnel; average age 21.14±2.09(19–40 years). A good correlation was found between the BMI hand strength measures. Grip strength was measured instrumentally. The rule "dominant hand(DH) is approximately 10% stronger than the non-dominant hand (NDH)" was found to be valid for left handed persons only (7%) otherwise these measures should be considered equivalent in both hands. The difference between maximum and average of three consecutive measurement of grip strength was found significant for both hands. As the significant difference was found between RGSmax (Maximum Grip Strength of Right Hand) and RGSav (Average Grip Strength of Right Hand); LGSmax (Maximum Grip Strength of Left Hand)/LGSav (Average Grip Strength of Left Hand) measures for RDH. RGSmax and LGSmax where correlated only for LDH. Therefore, average of three consecutive measurement of grip strength is more consistent for standard hand evaluation.

The objective of this study is to examine the relationship among anthropometric dimensions, grip span, discomfort, gender, and grip strength. The 24 volunteer subjects (12 males, 12 females) performed five grips squeezing their hardest for 2 minutes at each of the five grip spans on the Jamar grip dynamometer. The grip strength was recorded using the UPC software and then averaged for each of the 30 second intervals. The data was analyzed using ANOVA, post-hoc (Tukey) hypothesis tests, and regression. In the ANOVA analysis gender, grip span, time, and the interactions of gender-grip span, grip span-time, and time-gender were determined to be the significant effects. In all four of the 30 second intervals, average grip strength was significantly higher for males than females. Female average grip strength was found to be 70% of male average grip strength. The post-hoc (Tukey) tests showed that grip spans 3, 4, and 2 were significantly higher than grip spans 5 and 1. The anthropometry of several segments of the hand were found to be important predictors of grip strength and discomfort in the stepwise regressions. Grip span 4 had the highest average severity of discomfort, while grip span 1 had the most areas of the hand experiencing discomfort.

Open Reduction and Internal Locked Fixation of Unstable Distal Ulna Fractures With Concomitant Distal Radius Fracture

The neuronal circuitry for pain signals has been intensively studied for decades. The external lateral parabrachial nucleus (PB) was shown to play a crucial role in nociceptive information processing. Previous work, including ours, has demonstrated that stimulating the neuronal pathway from the PB to the central region of the amygdala (CeA) can substitute for an actual pain signal to drive an associative form of threat/fear memory formation. However, it is still unknown whether activation of the PB–CeA pathway can directly drive avoidance behavior, escape behavior, or only acts as strategic freezing behavior for later memory retrieval. To directly address this issue, we have developed a real-time Y-maze conditioning behavioral paradigm to examine avoidance behavior induced by optogenetic stimulation of the PB–CeA pathway. In this current study, we have demonstrated that the PB–CeA pathway carries aversive information that can directly trigger avoidance behavior and thereby serve as an alarm signal to induce adaptive behaviors for later decision-making.

Proximal Row Carpectomy for Advanced Kienböck's Disease: Average 10-Year Follow-Up

Aging is a normal process that can be indicated by muscle mass reduction or sarcopenia. Sarcopenia is problematic, since it is correlated with a higher risk of falls. Therefore, early measurement of physical performance in the elderly is necessary. Hand grip strength can be measured to assess hand muscle strength, while the timed up-and-go test (TUGT) is used to assess functional mobility. However, the correlation of both variables has not been clearly explained. We measured average hand grip strength and functional mobility in elderly patients and found a significantly meaningful moderate correlation between them (P = 0.000. r = −0.568). Average mean hand grip strength was 19.1 ± 7.00 kg and average median functional mobility was 12.8 (5.9–30.9) seconds.

Objective:The aim of this study was to demonstrate a new robotic technique for the fixation of the fracture of the hook of hamate.Methods:In this retrospective study, six patients who had undergone treatment of the hook of hamate fracture with a new technique using robot navigation were included. Patients were evaluated postoperatively with flexion - extension and radial-ulnar range of wrist motion, and were measured using a goniometer. Grip strength and pinch strength were measured and compared with the contralateral wrist at the final follow-up. The Visual Analog Scale (VAS) and the Mayo Wrist Score were used to evaluate and record the recovery outcome of the wrist.Results:Primarily, healing was achieved at 12.3 weeks postoperatively. At the final follow-up (5-22 months, average 13.1 months) the VAS score of the wrist was an average of 0.3 (0-2); the mean radial-ulnar deviation was 64.7°; the average of the flexion and extension range of motion was 141.9°; the average grip strength was 40.9 Kg; the average pinch strength was 11.8 Kg and the average Mayo Wrist Score was 95.8.Conclusion:This study has shown us that treatment of nondisplaced or minimal displaced fractures of the hook of the hamate with robot navigation is a viable technique with satisfactory clinical and radiological results.

Amylin is a pancreatic b-cell peptide that facilitates the regulation of blood glucose concentrations by inhibiting release of glucagon and modulating gastric emptying. No studies have investigated the effects of prolonged exercise on amylin. PURPOSE: To determine the effects of 90 min of treadmill exercise on amylin and other glucoregulatory hormone responses. METHODS: Eight young, healthy males (22.6 ± 1.5y) completed a preliminary trial followed by an experimental trial and a control trial one month apart. Descriptive data including assessment of VO2max and body composition were determined in the preliminary trial. The experimental trial began 2.5h after consumption of a standard nutrient beverage and consisted of treadmill exercise at 60% of VO2max for 90 minutes. Blood samples were collected beginning at 9:00am before (-30 and 0 min), during (18, 36, 54, 72, & 90min), and following exercise (20, 40, & 60min). For control conditions, blood samples were collected in a resting trial at the same time points as the experimental trial. Experimental and control trials were counterbalanced. Plasma was analyzed for amylin, glucagon, cortisol, glucose, and lactate concentrations. RESULTS: Plasma glucose concentrations remained stable (∼100 mg/dL) across exercise trials whereas lactate levels significantly increased to peak at 3.24 mM after the first 18 min of exercise then steadily declined. Amylin values significantly declined from 7.25 ± 2.03 pM at time 0 to 2.71 ± 0.69 pM immediately following exercise, although the decline was not significantly different from a smaller decline in the control trial. Although glucagon concentrations increased from 64.29 ± 3.16 to 85.29 ± 8.19 pg/mL, there was not a significant trial difference detected by ANOVA However, area-under-the-curve (total) glucagon concentrations were significantly higher in the exercise trial than the control trial. There was a significant time effect and trial effect for cortisol concentrations which steadily declined from rest [14.41 ± 2.31 μg/dL] to 54 min of exercise [9.61 ± 1.23 μg/dL], then increased to peak at 15.17 ± 2.08 μg/dL after 20 min of recovery. CONCLUSIONS: Reductions in circulating amylin concentrations are associated with increases in glucagon and cortisol during prolonged exercise in which blood glucose concentrations remain stable.

Detecting threats and escaping before serious confrontations are important for animals to avoid danger and death. Transient receptor potential ankyrin 1 (TRPA1), a member of the TRP superfamily, is expressed in a subset of sensory neurons and mediates nociception evoked by pungent chemicals. Using behavioral testing, we found that TRPA1 knockout mice failed to avoid entering a chamber filled with vapor of formalin, allyl isothiocyanate, and acrolein. The avoidance behavior was blocked by nasal but not subcutaneous administration of a blocker to TRPA1. We also found that TRPA1 knockout mice did not wake when exposed to formalin during sleep. Additionally, the spinal trigeminal nucleus, the first relay neurons of the trigeminal system, showed massive expression of c-Fos after a brief (3 min) exposure to formalin vapor. TRPA1 seems to be a sentinel for environmental chemicals and induces avoidance behaviors and waking by way of the trigeminal system.