Evolutionary divergence of neuroanatomical organization and related genes in chimpanzees and bonobos
- Psychology, MedicineCortex
The findings suggest that the brain anatomy of extant bonobos and chimpanzees show lineage-specific specializations and neither can be considered to more closely retain the ancestral state of Pan, which raises questions about the extent that modern chimpanzees or bonobos may serve as referential models for the neuroanatomy of the LCA of humans and apes.
The evolutionary trajectories of the individual amygdala nuclei in the common shrew, guinea pig, rabbit, fox and pig: A consequence of embryological fate and mosaic-like evolution.
- MedicineJournal of anatomy
The amygdala primarily evolved as a danger detector that regulates emotional behaviours and learning. However, it is also engaged in stress responses as well as olfactory/pheromonal and reproductive…
Brain transcriptomics of wild and domestic rabbits suggests that changes in dopamine signalling and ciliary function contributed to evolution of tameness.
- Medicine, BiologyGenome biology and evolution
RNA-sequencing data for four brain regions sampled at birth revealed hundreds of differentially expressed genes between wild and domestic rabbits, indicating an important role of dopamine signalling and ciliary function in the evolution of tameness during rabbit domestication.
The molecular taxonomy of primate amygdala via single-nucleus RNA-sequencing analysis
The molecular taxonomy of amygdala in rhesus monkeys is presented by single-cell RNA sequencing analysis and it is found that there are five major cell types in primate amygdala, glutamatergic neurons, GABAergic neurons, astroglia, oligodendrocytes and oligodendedrocyte progenitor cells (OPCs).
Comparison of bonobo and chimpanzee brain microstructure reveals differences in socio-emotional circuits
- Medicine, BiologyBrain Structure and Function
Bonobos had significantly greater neuropil in the central and accessory basal nuclei of the amygdala, as well as layers V–VI of the subgenual ACC, which support the conclusion that bonobo and chimpanzee brains differ in the anatomical organization of socio-emotional systems that may reflect species-specific variation in behavior.
A radial histogenetic model of the mouse pallial amygdala
- Biology, MedicineBrain Structure and Function
This approach shows that subtle changes to the conventional schema of the amygdala allow a radial histogenetic model to be recognized, which is consistent with molecularly coded differential identities of its units and strata.
Conserved features of anterior cingulate networks support observational learning across species
- Psychology, MedicineNeuroscience & Biobehavioral Reviews
This review showcases anatomical and functional connections of the anterior cingulate cortex in primates and rodents that contribute to the perception of social signals and discusses some of the neural mechanisms underlying observational learning within the ACC and its extended network.
A global framework for a systemic view of brain modeling
- Computer Science, MedicineBrain Informatics
A biologically informed view of pavlovian and instrumental conditioning can be very precious to revisit classical Reinforcement Learning and provide a basis to ensure really autonomous learning.
Novel use of Diffusion Tensor Imaging to Delineate the Rat Basolateral Amygdala
Use of MRI directionally encoded diffusion tensor imaging (DTI) can delineate the basolateral amygdala (BLA) and volumes derived from DTI were found to match those obtained using histological methods.
High-Resolution Resting-State Functional Connectivity of the Extended Amygdala
- Medicine, Computer ScienceBrain Connect.
High-resolution 7-Tesla MRI was used to define, compare, and contrast functional connectivity of the extended amygdala and the bed nucleus of the stria terminalis in 57 neurologically healthy young adults to provide more clarity of the nuances of extended amygdala FC and its relationship with anxiety.
SHOWING 1-10 OF 35 REFERENCES
The amygdaloid complex: anatomy and physiology.
- Psychology, MedicinePhysiological reviews
The anatomical and physiological substrates proposed to underlie amygdala function are examined, suggesting that long-term synaptic plasticity of inputs to the amygdala underlies the acquisition and perhaps storage of the fear memory.
Organization of intra-amygdaloid circuitries in the rat: an emerging framework for understanding functions of the amygdala
- Psychology, MedicineTrends in Neurosciences
These findings suggest that after the stimulus enters the amygdala, the highly organized intra-amygdaloid circuitries provide a pathway by which the representation of a stimulus becomes distributed in parallel to various amygdaloids nuclei.
Remarkable species diversity in Malagasy mouse lemurs (primates, Microcebus).
- Biology, MedicineProceedings of the National Academy of Sciences of the United States of America
Phylogenetic analysis of mtDNA sequence data confirms the observation that species diversity in the world's smallest living primate (genus Microcebus) has been greatly underestimated and revises established hypotheses of ecogeographic constraint for the maintenance of species boundaries in these endemic Malagasy primates.
Has Vicariance or Dispersal Been the Predominant Biogeographic Force in Madagascar? Only Time Will Tell
It is concluded that most of the present-day biota of Madagascar is comprised of the descendents of Cenozoic dispersers, predominantly with African origins.
Fear and anxiety: animal models and human cognitive psychophysiology.
- Psychology, MedicineJournal of affective disorders
This paper focuses on special, attentional features of emotional processing: The automaticity of fear reactions, hyper-reactivity to minimal threat-cues, and evidence that the physiological responses in fear may be independent of slower, language-based appraisal processes.
Emotion circuits in the brain.
- Psychology, MedicineAnnual review of neuroscience
This work has pinpointed the amygdala as an important component of the system involved in the acquisition, storage, and expression of fear memory and has elucidated in detail how stimuli enter, travel through, and exit the amygdala.
The functional neuroanatomy of emotion and affective style
- Medicine, PsychologyTrends in Cognitive Sciences
It is proposed that the PFC plays a crucial role in affective working memory and is most directly involved in the representation of elementary positive and negative emotional states while the dorsolateral PFC may be involved inThe representation of the goal states towards which these elementarypositive and negative states are directed.
The Amygdala : a functional analysis
1. The amygdala - what's happened in the last decade 2. Connectivity of the rat amygdaloid complex 3. Synaptic plasticity in the amygdala 4. Plasticity in the amygdala and kindling 5. The amygdala:…
Synaptic Plasticity in the Central Nucleus of the Amygdala
- Biology, MedicineReviews in the neurosciences
The present review summarizes the evidence supporting the possibility that the central nucleus of the amygdala may also be a site of plasticity and play an active role in some forms of Pavlovian learning.
Neurocircuitry Models of Posttraumatic Stress Disorder and Extinction: Human Neuroimaging Research—Past, Present, and Future
- Medicine, PsychologyBiological Psychiatry
It is proposed that posttraumatic stress disorder is characterized by exaggerated amygdala responses and deficient frontal cortical function and deficiencies in extinction and the capacity to suppress attention/response to trauma-related stimuli, as well as deficient hippocampal function.