Affordances after spinal cord injury

Spinal cord injury can cause cognitive impairments even when no cerebral lesion is appreciable. As patients are forced to explore the environment in a non-canonical position (i.e., seated on a wheelchair), a modified relation with space can explain motor-related cognitive differences compared to non-injured individuals. Peripersonal space is encoded in motor terms, that is, in relation to the representation of action abilities and is strictly related to the affordance of reachability. In turn, affordances, the action possibilities suggested by relevant properties of the environment, are related to the perceiver's peripersonal space and motor abilities. One might suppose that these motor-related cognitive abilities are compromised when an individual loses the ability to move. We shed light on this issue in 10 patients with paraplegia and 20 matched controls. All have been administered an affordances-related reachability judgement task adapted from Costantini, Ambrosini, Tieri, Sinigaglia, and Committeri (2010, Experimental Brain Research, 207, 95) and neuropsychological tests. Our findings demonstrate that patients and controls show the same level of accuracy in estimating the location of their peripersonal space boundaries, but only controls show the typical overestimation of reaching range. Secondly, patients show a higher variability in their judgements than controls. Importantly, this finding is related to the patients’ ability to perform everyday tasks. Finally, patients are not faster in making their judgements on reachability in peripersonal space, while controls are. Our results suggest that not moving freely or as usual in the environment impact decoding of action-related properties even when the upper limbs are not compromised.     

Preparing children to cope with earthquakes: Building emotional competence

Natural disasters, including earthquakes, can have a traumatic impact on children's psychological wellbeing and development. The efficacy of interventions aimed at enhancing children's socio-emotional learning has been documented in the literature. At the same time, these techniques are the key for training children for possible future disasters by enhancing their knowledge about behavioural preparedness and emotional competence. However, research on evidence-based training programs on earthquakes combining digital and traditional activities is scarce. We tested the efficacy of a 10-unit training program for primary school children, developed within the Emotional Prevention and Earthquakes in Primary School (PrEmT) project. The program aimed at increasing knowledge of and metacognition about earthquakes, safety behaviours, emotions, and coping strategies, through digital (using the web-application HEMOT^®, Helmet for EMOTions, developed ad-hoc) and traditional activities (completing paper-and-pencil tasks). The participants were 548 second and fourth-graders from Italian schools. They were divided into an experimental group (participating in the training program) and a control group. Both groups participated in pretests and posttests to evaluate changes in their knowledge of training-related contents. For ethical reasons, we also measured children's wellbeing. Generalized linear mixed models indicated an improvement in the experimental group's knowledge and metacognition about earthquakes, safety behaviours, emotions, and coping strategies after the training program, compared to the control group. Children's general wellbeing did not deteriorate during participation in the project. The results documented the efficacy of the evidence-based training program developed within the PrEmT project. The program provides a preventive method for enhancing earthquake-related resilience that could be generalized to other kinds of disasters.     

Consequences of brain tumour resection on emotion recognition

Emotion processing impairments are common in patients undergoing brain surgery for fronto-temporal tumour resection, with potential consequences on social interactions. However, evidence is controversial concerning side and site of lesions causing such deficits. This study investigates visual and auditory emotion recognition in brain tumour patients with the aim of clarifying which lesion sites are related to impairments in emotion processing from different modalities. Thirty-four patients were evaluated, before and after surgery, on facial expression and emotional prosody recognition; voxel-based lesion–symptom mapping (VLSM) analyses were performed on patients’ post-surgery MRI images. Results showed that patients’ performance decreased after surgery in both visual and auditory modalities, but, in general, recovered 3 months after surgery. In facial expression recognition, left brain-damaged patients showed greater post-surgery deterioration than right brain-damaged ones, whose performance specifically decreased for sadness and fear. VLSM analysis revealed two segregated areas in the left hemisphere accounting for post-surgery scores for happy (fronto-temporo-insular region) and surprised (middle frontal gyrus and inferior fronto-occipital fasciculus) facial expressions. Our findings demonstrate that surgical removal of tumours in the fronto-temporal region produces impairment in facial emotion recognition with an overall recovery at 3 months, suggesting a partially different representation of positive and negative emotions in the left and right hemispheres for visually – but not auditory – presented emotions; moreover, we show that deficits in specific expression recognition are associated with discrete lesion locations.     

A data-driven approach to neuropsychological features in isolated REM behaviour disorder: A latent class analysis

Recent evidence demonstrated that neuropsychological assessment may be considered a valid marker of neurodegeneration in idiopathic REM sleep behaviour disorder (iRBD). However, little is known about the possible neuropsychological heterogeneity within the iRBD population. This retrospective study aimed to identify and describe different neuropsychological phenotypes in iRBD patients by means of a data-driven approach using latent class analysis. A total of 289 iRBD patients underwent a neuropsychological assessment evaluating cognitive domains: global cognition, language, short- and long-term memory, executive functions and visuospatial abilities. The presence of mild cognitive impairment (MCI) was also assessed. Latent class analysis was carried out to identify iRBD subtypes according to neuropsychological scores. The most parsimonious model identified three latent classes. Groups were labelled as follows: Class 2 “severely impaired” (n = 83/289): mean pathological scores in different tests, a high percentage of MCI multiple-domain and impairment in all neuropsychological domains. Class 1 “moderately impaired” (n = 44/289): mean neuropsychological score within the normal value, a high percentage of MCI (high risk to phenoconversion) and great impairment in the visuospatial domain. Class 3 “slightly impaired” (n = 162/289): no deficit worthy of attention except for short- and long-term memory. Our results suggest three different clinical phenotypes within the iRBD population. These findings may be relevant in the future for predicting the clinical trajectories of phenoconversion in iRBD.     

Refuting two dilemmas for infallibilism

Philosophical Studies - According to a version of Infallibilism, if one knows that p, then one’s evidence for p entails p. In her Fallibilism: Evidence and Knowledge (2018, OUP), Jessica...     

Playing with the face: playful facial "chattering" and signal modulation in a monkey species (Theropithecus gelada)

Darwin (1872), in The expression of emotions in man and animals, underlined that human facial expressions represent a shared heritage of our species with nonhuman primates. Play is a fertile field to examine the role of facial expressions that we share with our common ancestors because the primate play face is homologous to human laughter. Here, we focus on the use of two playful expression variants (PF: play face, mouth opened with only the lower teeth exposed; FPF: full play face, lower/upper teeth and gums exposed via the actively retraction of the upper lip) in Theropithecus gelada. During ontogeny PF was replaced by FPF; in older subjects PF was virtually absent. The ontogenetic transition appears to reflect the phylogenetic sequence of the two playful displays with FPF considered a derived form of PF. This age-trend bias of facial displays is probably due to their different roles in communication. The correspondence between facial signals emitted and elicited is a valuable criterion to evaluate playmates' attentional state. Adults were more sensitive than immatures in responding to the play faces of others. Probably, previous playful experience, social competence, and neural circuit maturation are at the basis of adult sensitiveness. Similar to humans, where unconscious laughing is deserved for close friends and/or relatives, FPF was extremely frequent during gelada mother-offspring play. Probably, under some intimate circumstances, facial displays should be primarily linked to the spontaneous expression of emotional states of the sender more than to the strategic transfer of actual information to the receiver.     

Response of captive lowland gorillas (Gorilla gorilla gorilla) to different housing conditions: testing the aggression-density and coping models

Several studies have suggested that primates react differently to spatial reduction. In this article, the authors tested some general hypotheses on primate response to spatial reduction by studying the Apenheul lowland gorillas (Gorilla gorilla gorilla; Apeldoorn, the Netherlands). The frequency of conflicts did not greatly change between the 2 housing settings, thus not supporting the density- aggression model. Indoor, gorillas performed touching behavior more often and increased their level of reconciliation. These findings support the coping model. Indoor, the gorillas also maintained broader interindividual distances by increasing the levels of sitting alone, avoidance, and dismissing behaviors. In conclusion, the Apenheul gorillas modified selectively the distribution of some patterns typical of their behavioral repertoire in response to a high-density condition. Both avoidance and coping tactics were used, thus revealing high levels of behavioral flexibility in this species.     

Domestic pigs (Sus scrofa) engage in non-random post-conflict affiliation with third parties: cognitive and functional implications

Animal Cognition - In social mammals, conflict resolution involves the reunion of former opponents (aggressor and victim) after an aggressive event (reconciliation) or post-conflict triadic...