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PloS One 2023Social learning is highly adaptive in transmitting essential information between individuals in many species. While several mechanisms have been observed, less is known...
Social learning is highly adaptive in transmitting essential information between individuals in many species. While several mechanisms have been observed, less is known about how much animals can remember. However, results on observational spatial memory among caching species, i.e. a form of social learning allowing individuals to remember and pilfer food caches made by others, suggest that this ability correlates with their social organization. Both wolves and their domesticated form, dogs, are social species known to make food caches, and previous studies have shown that they both can use observational spatial memory abilities to find hidden food. In order to test how much socially transmitted information wolves and dogs can remember, we tested both species in a task requiring them to find 4, 6 or 8 caches after they observed a human hiding food items, or after a control condition where they could not observe the hiding. We found that both wolves and dogs retrieved more caches and were more efficient for the first few caches if they observed the hiding than in the control condition, suggesting that they did not simply rely on scent to find the rewards. Interestingly, wolves outperformed dogs irrespective of whether the caching could be observed or not. We suggest that this result is due to a difference in motivation/persistence between wolves and dogs rather than observational spatial memory.
Topics: Animals; Dogs; Food; Mental Recall; Motivation; Spatial Memory; Wolves
PubMed: 37703235
DOI: 10.1371/journal.pone.0290547 -
Brain and Language Aug 2023Novel word learning ability has been associated with language treatment outcomes in people with aphasia (PWA), and its assessment could inform prognosis and...
Novel word learning ability has been associated with language treatment outcomes in people with aphasia (PWA), and its assessment could inform prognosis and rehabilitation. We used a brief experimental task to examine novel word learning in PWA, determine the value of phonological cueing in assessing learning outcomes, and identify factors that modulate learning ability. Twelve PWA and nineteen healthy controls completed the task, and recall and recognition tests of learning ability. Most PWA showed comparable learning outcomes to those of the healthy controls. Learning assessed via expressive recall was more clearly evidenced with phonological cues. Better single word processing abilities and phonological short-term memory and higher integrity of the left inferior frontal gyrus were related to better learning performance. Brief learning tasks like this one are clinically feasible and hold promise as screening tools of verbal learning in PWA once validated and evaluated for their capacity to predict treatment outcomes.
Topics: Humans; Aphasia; Learning; Mental Recall; Recognition, Psychology; Memory, Short-Term
PubMed: 37453400
DOI: 10.1016/j.bandl.2023.105303 -
Research Square Oct 2023Adolescence is among the most vulnerable period for the emergence of serious mental illnesses. Addressing this vulnerability has generated interest in identifying...
Adolescence is among the most vulnerable period for the emergence of serious mental illnesses. Addressing this vulnerability has generated interest in identifying markers of risk for symptoms and opportunities for early intervention. Physical fitness has been linked to psychopathology and may be a useful risk marker and target for early intervention. New wearable technology has made assessing fitness behavior more practical while avoiding recall and self-report bias. Still, questions remain regarding the clinical utility of physical fitness metrics for mental health, both transdiagnostically and along specific symptom dimensions. The current study includes 5007 adolescents (ages 10 to 13) who participated in the Adolescent Brain Cognitive Development (ABCD) study and additional sub-study that collected fitness data from wearable technology and clinical symptom measures. Physical fitness metrics included resting heart rate (RHR- an index of cardiovascular health), time spent sedentary (associated with increased inflammation and cardiovascular disease), and time spent in moderate physical activity (associated with increased neurogenesis, neuroplasticity, and healthy neurodevelopment). Self-report clinical symptoms included measures of internalizing symptoms, externalizing symptoms, and psychosis-like experiences - PLE). Increased RHR- lower cardiovascular fitness- related only to greater internalizing symptoms (t = 3.63). More sedentary behavior related to elevated PLE severity (t = 5.49). More moderate activity related to lower PLE (t=-2.69) and internalizing (t=-6.29) symptom severity. Wearable technology fitness metrics linked physical health to specific mental health dimensions, which emphasizes the utility of detailed digital health data as a marker for risk and the need for precision in targeting physical health behaviors to benefit symptoms of psychopathology.
PubMed: 37886441
DOI: 10.21203/rs.3.rs-3270112/v1 -
Neuropsychologia Dec 2023To understand the neural basis of episodic memory it is necessary to appreciate the significance of the fornix. This pathway creates a direct link between those temporal...
To understand the neural basis of episodic memory it is necessary to appreciate the significance of the fornix. This pathway creates a direct link between those temporal lobe and medial diencephalic sites responsible for anterograde amnesia. A collaboration with Andrew Mayes made it possible to recruit and scan 38 patients with colloid cysts in the third ventricle, a condition associated with variable fornix damage. Complete fornix loss was seen in three patients, who suffered chronic long-term memory problems. Volumetric analyses involving all 38 patients then revealed a highly consistent relationship between mammillary body volume and the recall of episodic memory. That relationship was not seen for working memory or tests of recognition memory. Three different methods all supported a dissociation between recollective-based recognition (impaired) and familiarity-based recognition (spared). This dissociation helped to show how the mammillary body-anterior thalamic nuclei axis, as well as the hippocampus, is vital for episodic memory yet is not required for familiarity-based recognition. These findings set the scene for a reformulation of temporal lobe and diencephalic amnesia. In this revised model, these two regions converge on overlapping cortical areas, including retrosplenial cortex. The united actions of the hippocampal formation and the anterior thalamic nuclei on these cortical areas enable episodic memory encoding and consolidation, impacting on subsequent recall.
Topics: Humans; Memory, Episodic; Diencephalon; Hippocampus; Amnesia; Mental Recall; Mammillary Bodies
PubMed: 37939875
DOI: 10.1016/j.neuropsychologia.2023.108728 -
Cell Reports Mar 2024The maturation of engrams from recent to remote time points involves the recruitment of CA1 neurons projecting to the anterior cingulate cortex (CA1→ACC)....
The maturation of engrams from recent to remote time points involves the recruitment of CA1 neurons projecting to the anterior cingulate cortex (CA1→ACC). Modifications of G-protein-coupled receptor pathways in CA1 astrocytes affect recent and remote recall in seemingly contradictory ways. To address this inconsistency, we manipulated these pathways in astrocytes during memory acquisition and tagged c-Fos-positive engram cells and CA1→ACC cells during recent and remote recall. The behavioral results were coupled with changes in the recruitment of CA1→ACC projection cells to the engram: Gq pathway activation in astrocytes caused enhancement of recent recall alone and was accompanied by earlier recruitment of CA1→ACC projecting cells to the engram. In contrast, Gi pathway activation in astrocytes resulted in the impairment of only remote recall, and CA1→ACC projecting cells were not recruited during remote memory. Finally, we provide a simple working model, hypothesizing that Gq and Gi pathway activation affect memory differently, by modulating the same mechanism: CA1→ACC projection.
Topics: Astrocytes; Memory, Long-Term; Memory; Mental Recall; Neurons; Gyrus Cinguli; Hippocampus
PubMed: 38483907
DOI: 10.1016/j.celrep.2024.113943 -
Psychological Science Jul 2023Humans can adapt when complex patterns unfold at a faster or slower pace, for instance when remembering a grocery list that is dictated at an increasingly fast rate....
Humans can adapt when complex patterns unfold at a faster or slower pace, for instance when remembering a grocery list that is dictated at an increasingly fast rate. Integrating information over such timescales crucially depends on working memory, but although recent findings have shown that working memory capacity can be flexibly adapted, such adaptations have not yet been demonstrated for encoding speed. In a series of experiments, we found that young adults encoded at a faster rate when they were adapted to overall and recent stimulus duration. Interestingly, our participants were unable to use explicit cues to speed up encoding, even though these cues were objectively more informative than statistical information. Our findings suggest that adaptive tuning of encoding speed in working memory is a fundamental but largely implicit mechanism underlying our ability to keep up with the pace of our surroundings.
Topics: Young Adult; Humans; Memory, Short-Term; Cues; Mental Recall
PubMed: 37260047
DOI: 10.1177/09567976231173902 -
Medicina (Kaunas, Lithuania) Jul 2023: The tongue mucosa often changes due to various local and systemic diseases or conditions. This study aimed to investigate whether deep learning can help detect...
: The tongue mucosa often changes due to various local and systemic diseases or conditions. This study aimed to investigate whether deep learning can help detect abnormal regions on the dorsal tongue surface in patients and healthy adults. : The study collected 175 clinical photographic images of the dorsal tongue surface, which were divided into 7782 cropped images classified into normal, abnormal, and non-tongue regions and trained using the VGG16 deep learning model. The 80 photographic images of the entire dorsal tongue surface were used for the segmentation of abnormal regions using point mapping segmentation. : The F1-scores of the abnormal and normal classes were 0.960 (precision: 0.935, recall: 0.986) and 0.968 (precision: 0.987, recall: 0.950), respectively, in the prediction of the VGG16 model. As a result of evaluation using point mapping segmentation, the average F1-scores were 0.727 (precision: 0.717, recall: 0.737) and 0.645 (precision: 0.650, recall: 0.641), the average intersection of union was 0.695 and 0.590, and the average precision was 0.940 and 0.890, respectively, for abnormal and normal classes. : The deep learning algorithm used in this study can accurately determine abnormal areas on the dorsal tongue surface, which can assist in diagnosing specific diseases or conditions of the tongue mucosa.
Topics: Adult; Humans; Deep Learning; Algorithms; Mental Recall; Mouth Mucosa
PubMed: 37512104
DOI: 10.3390/medicina59071293 -
Journal of Psychosocial Nursing and... Mar 2024Reminiscence interventions have been tested with people with and without cognitive impairment. However, the literature on reminiscence interventions for the latter is... (Review)
Review
Reminiscence interventions have been tested with people with and without cognitive impairment. However, the literature on reminiscence interventions for the latter is less extensive. The purpose of the current scoping review was to list and describe group session reminiscence protocols used with older adults without cognitive impairment and not involving psychotherapy. Arksey and O'Malley's five stages scoping framework was used for this review. Seven databases were searched, and nine articles were included. Results show the heterogeneity of reminiscence programs available for older adults without cognitive impairment and highlight that key elements for replication are often lacking. Well-defined reminiscence programs should be selected for replication and evaluation studies. However, few well-defined reminiscence programs not involving psychotherapy are available for older adults without cognitive impairment. [(3), 15-21.].
Topics: Humans; Aged; Cognitive Dysfunction; Psychotherapy; Mental Recall
PubMed: 37646606
DOI: 10.3928/02793695-20230821-03 -
Nutrients Feb 2024The global aging situation has reached a serious stage, and healthy lifestyles, like regular physical activity and eating breakfast, could slow the process. Phenotypic...
BACKGROUND
The global aging situation has reached a serious stage, and healthy lifestyles, like regular physical activity and eating breakfast, could slow the process. Phenotypic age (PhenoAge) is regarded as a novel measure of aging. Therefore, our study aimed to quantify the impact of physical activity and eating breakfast on aging via PhenoAge and phenotypic age acceleration (PhenoAgeAccel).
METHODS
A total of 3719 adults who participated in the National Health and Nutrition Examination Survey were involved in this study. Physical activity was divided into an active group and an inactive group. According to the number of reported breakfast recalls, eating breakfast was divided into the no recalls group, one recall group, and both recalls group. Sensitivity analysis was performed by stratified analysis.
RESULTS
Active physical activity was a protective factor for PhenoAge and PhenoAgeAccel. Compared to the inactive group, the β values of the active group were -8.36 (-10.09, -6.62) for PhenoAge and -1.67 (-2.21, -1.14) for PhenoAgeAccel. The stratified analysis results showed that in the groups reporting breakfast in both recalls, one recall, and no recalls, the β values of the active group were -8.84 (-10.70, -6.98), -8.17 (-12.34, -4.00), and -3.46 (-7.74, 0.82), respectively, compared to the inactive group.
CONCLUSIONS
Active physical activity was strongly correlated with lower values of PhenoAge and PhenoAgeAccel, but the association was no longer statistically significant when combined with not regularly eating breakfast.
Topics: Breakfast; Nutrition Surveys; Exercise; Mental Recall; Feeding Behavior
PubMed: 38474704
DOI: 10.3390/nu16050575 -
Cureus Jan 2024In the intensive care unit (ICU), patients often experience fragmented memories, primarily comprising dreams and illusions. These experiences can impact psychosocial... (Review)
Review
In the intensive care unit (ICU), patients often experience fragmented memories, primarily comprising dreams and illusions. These experiences can impact psychosocial well-being, correlating with post-traumatic stress symptoms and heightened anxiety. Understanding these phenomena is crucial for holistic care. To systematically explore patients' perspectives concerning the recollection of dreams and unreal encounters during their stay in the ICU, considering pertinent clinical conditions and potential influencing factors, we conducted a comprehensive search in the PubMed/MEDLINE, Web of Science, and Scopus databases until November 20, 2023, following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. From an initial pool of 288 records, a thorough screening for eligibility resulted in the inclusion of nine studies for this systematic review. These selected studies underwent evaluation using either the Critical Appraisal Skills Programme (CASP) Qualitative Checklist or the Newcastle-Ottawa Scale (NOS). All studies categorized dreams into three main types: positive, distressing (including nightmares), and neutral experiences. These were further detailed based on aspects such as time, space, senses, emotions, and distinguishing between reality and unreality. Two studies found associations between dreams and conditions like Guillain-Barré syndrome (GBS), mental abnormalities, and delirium. In one study, GBS patients had more vivid dreams, hallucinations, and delusions compared to ICU control group patients; delirious patients tend to report more frequent frightening dreams. Patients in the ICU who recalled dreams often had more severe illness, longer stays, and higher ventilation frequency. Notably, a prolonged ICU stay significantly predicted the likelihood of dream recall, as consistently observed in three other studies. This suggests that patients with prolonged ICU stays, experiencing higher dream recall, underwent extended treatments. This systematic exploration of patients' perspectives on fragmented memories underscores the connections between these experiences, clinical conditions such as GBS and delirium, and extended ICU stays. Recognizing and attending to these psychological aspects in post-ICU care is critical for alleviating the enduring emotional consequences for patients.
PubMed: 38313939
DOI: 10.7759/cureus.51588