Functional organization of the caudal part of the human superior parietal lobule

: Like in macaque, the caudal portion of the human superior parietal lobule (SPL) plays a key role in a series of perceptive, visuomotor and somatosensory processes. Here, we review the functional properties of three separate portions of the caudal SPL, i.e., the posterior parieto-occipital sulcus (POs), the anterior POs, and the anterior part of the caudal SPL. We propose that the posterior POs is mainly dedicated to the analysis of visual motion cues useful for object motion detection during self-motion and for spatial navigation, while the more anterior parts are implicated in visuomotor control of limb actions. The anterior POs is mainly involved in using the spotlight of attention to guide reach-to-grasp hand movements, especially in dynamic environments. The anterior part of the caudal SPL plays a central role in visually guided locomotion, being implicated in controlling leg-related movements as well as the four limbs interaction with the environment, and in encoding egomotion-compatible optic flow. Together, these functions reveal how the caudal SPL is strongly implicated in skilled visually-guided behaviors

A common neural substrate for processing scenes and egomotion-compatible visual motion

Neuroimaging studies have revealed two separate classes of category-selective regions specialized in optic flow (egomotion-compatible) processing and in scene/place perception. Despite the importance of both optic flow and scene/place recognition to estimate changes in position and orientation within the environment during self-motion, the possible functional link between egomotion- and scene-selective regions has not yet been established. Here we reanalyzed functional magnetic resonance images from a large sample of participants performing two well-known \u201clocalizer\u201d fMRI experiments, consisting in passive viewing of navigationally relevant stimuli such as buildings and places (scene/place stimulus) and coherently moving fields of dots simulating the visual stimulation during self-motion (flow fields). After interrogating the egomotion-selective areas with respect to the scene/place stimulus and the scene-selective areas with respect to flow fields, we found that the egomotion-selective areas V6+ and pIPS/V3A responded bilaterally more to scenes/places compared to faces, and all the scene-selective areas (parahippocampal place area or PPA, retrosplenial complex or RSC, and occipital place area or OPA) responded more to egomotion-compatible optic flow compared to random motion. The conjunction analysis between scene/place and flow field stimuli revealed that the most important focus of common activation was found in the dorsolateral parieto-occipital cortex, spanning the scene-selective OPA and the egomotion-selective pIPS/V3A. Individual inspection of the relative locations of these two regions revealed a partial overlap and a similar response profile to an independent low-level visual motion stimulus, suggesting that OPA and pIPS/V3A may be part of a unique motion-selective complex specialized in encoding both egomotion- and scene-relevant information, likely for the control of navigation in a structured environment

Magmatic and geodynamic significance of two volcaniclastic deposits in the Oligo-Miocene successions of Southern Apennines (Italy)

Two volcaniclastic deposits, ROC and SBA, in the Oligo-Miocene succession of the Southern Apennines, between Apulia and Campania regions, have been studied for the first time. Mineral composition, SEM-EDS and LA-ICP-MS analyses, for major and trace elements, respectively, allowed recognising magmatic products of typical calc-alkaline to high-K calc-alkaline affinity. ROC glasses have a restricted com- positional range in the rhyolitic field whereas SBA glasses show a wide compositional range from andesite to rhyolite, with dacite as the most common composition. Fission track dating of apatite in the SBA de- posits yielded an age of 21.7 ± 2.2 Ma, which is comprised between the Chattian and the Burdigalian. Biostratigraphic analyses in sedimentary layers adjacent to ROC layers indicate they were deposited not before Burdigalian. A provenance analysis of the studied volcaniclastics in relation to the possible source areas of the Mediterranean and neighbour- ing areas was performed. On the basis of time constraints, mineral and trace element composition a convincing correlation of the ROC deposits with potential source areas did not emerge. Instead, a provenance from the southwestern and northwestern Sardinian volcanic centres was favoured for the SBA volcaniclastic deposits. This hypothesis is compatible with the Oligo-Miocene paleogeographic reconstructions, that show the proximity of the Apennine sedimentary basins to Sardinia before the opening of the Tyrrhenian sea

Psychological distress, anger and quality of life in polycystic ovary syndrome: associations with biochemical, phenotypical andsocio-demographic factors

Objective: To investigate the association between polycystic ovary syndrome (PCOS) and psychological disturbances, including anger. To analyze whether the biochemical/phenotypical features of PCOS play a role in the type and severity of psychological disorders. Material and methods: This case–control study included 30 PCOS patients meeting NIH criteria and 30 non-PCOS women referring to Reproductive Medicine Unit for infertility. Complete clinical and biochemical screening and the self-reported psychological data [Symptom Check List 90-R (SCL-90-R); Short-Form Health Survey 36 (SF-36); and State-Trait Anger Expression Inventory-2 (STAXI-2)] were collected. Statistical analyses were performed with SPSS-21. Results: Compared with control women, women with PCOS reported significantly higher scores on SCL-90-R scales of somatization, anxiety, hostility, psychoticism, overall psychological distress and a number of symptoms. At STAXI-2, patients with PCOS scored higher in trait-anger and in the outward expression of anger, while lower in outward anger-control; PCOS patients had significantly lower scores on SF-36 scales of physical functioning and bodily pain. Hirsutism was directly associated with anxiety. Regarding the associations between phenotypical/biochemical features and psychological distress in PCOS patients, results showed that waist-to-hip ratio is inversely related to anxiety, psychoticism, hostility and to the indexes of psychological distress; such inverse relationship was also seen between plasmatic levels of testosterone and trait-anger, and between total cholesterol and hostility. Conclusions: Results were consistent with the previous literature on the well-being of PCOS women (in particular for anxiety and quality of life [QoL]) but failed to find evidence for depression. The relationship between psychological distress and the features of the syndrome highlighted the role of hirsutism. With respect to hyperandrogenemia, our data rejected its involvement in the elevated negative mood states and affects. Adopting an interdisciplinary approach in the PCOS patients’ care, anger showed to be common and deserves major consideration

The human middle temporal cortex responds to both active leg movements and egomotion-compatible visual motion

The human middle-temporal region MT+ is highly specialized in processing visual motion. However, recent studies have shown that this region is modulated by extraretinal signals, suggesting a possible involvement in processing motion information also from non-visual modalities. Here, we used functional MRI data to investigate the influence of retinal and extraretinal signals on MT+ in a large sample of subjects. Moreover, we used resting-state functional MRI to assess how the subdivisions of MT+ (i.e., MST, FST, MT, and V4t) are functionally connected. We first compared responses in MST, FST, MT, and V4t to coherent vs. random visual motion. We found that only MST and FST were positively activated by coherent motion. Furthermore, regional analyses revealed that MST and FST were positively activated by leg, but not arm, movements, while MT and V4t were deactivated by arm, but not leg, movements. Taken together, regional analyses revealed a visuomotor role for the anterior areas MST and FST and a pure visual role for the anterior areas MT and V4t. These findings were mirrored by the pattern of functional connections between these areas and the rest of the brain. Visual and visuomotor regions showed distinct patterns of functional connectivity, with the latter preferentially connected with the somatosensory and motor areas representing leg and foot. Overall, these findings reveal a functional sensitivity for coherent visual motion and lower-limb movements in MST and FST, suggesting their possible involvement in integrating sensory and motor information to perform locomotion

Egomotion-related visual areas respond to active leg movements

Monkey neurophysiology and human neuroimaging studies have demonstrated that passive viewing of optic flow stimuli activates a cortical network of temporal, parietal, insular, and cingulate visual motion regions. Here, we tested whether the human visual motion areas involved in processing optic flow signals simulating self-motion are also activated by active lower limb movements, and hence are likely involved in guiding human locomotion. To this aim, we used a combined approach of task-evoked activity and resting-state functional connectivity by fMRI. We localized a set of six egomotion-responsive visual areas (V6+, V3A, intraparietal motion/ventral intraparietal [IPSmot/VIP], cingulate sulcus visual area [CSv], posterior cingulate sulcus area [pCi], posterior insular cortex [PIC]) by using optic flow. We tested their response to a motor task implying long-range active leg movements. Results revealed that, among these visually defined areas, CSv, pCi, and PIC responded to leg movements (visuomotor areas), while V6+, V3A, and IPSmot/VIP did not (visual areas). Functional connectivity analysis showed that visuomotor areas are connected to the cingulate motor areas, the supplementary motor area, and notably to the medial portion of the somatosensory cortex, which represents legs and feet. We suggest that CSv, pCi, and PIC perform the visual analysis of egomotion-like signals to provide sensory information to the motor system with the aim of guiding locomotio

Working With Infertile Couples Seeking Assisted Reproduction: An Interpretative Phenomenological Study With Infertility Care Providers

Although most studies investigated the impact of infertility and its treatment on the couple, a small body of evidence suggested that infertility care providers may experience different sources of stress related for instance to excessive workload, the complexity of the technique, and relational difficulties with patients. The current study aimed at providing further insight into the understanding of the subjective experience of infertility care providers by highlighting their feelings and emotions, personal meanings, challenges, and opportunities. Following the methodological guidelines of Interpretative Phenomenological Analysis, we conducted individual semi-structured interviews with 23 members of two different fertility units. Interviews were audiotaped and transcribed verbatim. Textual analysis was then conducted to identify emerging dominant themes and subthemes. Three main themes were extracted: (i) dealing with infertile patients and their specificities, (ii) performing assisted reproductive technology (ART), (iii) being part of a team. These themes related to participants experiencing: (i) difficulties in establishing an empathic connection and communicating with couples, such that women were sometimes perceived as \u201cparticular patients\u201d and men as poorly involved in the process; (ii) difficulties in dealing with a complex procedure in which errors are not allowed (as reported by embryologists), with a growing number of women aged > 40 seeking assisted reproduction, despite the risks for their health; (iii) being part of a team as a resource, although the huge amount of time spent together can involve conflicts and organizational problems. These findings suggested that patients\u2019 overpersistence (rather than just dropout) represents an important source of stress for infertility care providers. At the same time, the concept of particular or difficult patient derives from the combination of multiple factors, including providers\u2019 own history and subjective experience. The presence of mental health professionals in fertility units is essential to help providers improve the quality of doctor-patient communication and relieve the stress related to organizational issues and conflicts