Transient expression of heavy-chain neurofilaments in the perigeniculate nucleus of cats
This study focused on the postnatal development of the PGN in cats, using the SMI-32 antibody, which recognizes non-phosphorylated heavy-chain neurofilaments responsible for neuronal structural maturation and is also used as a marker for motion processing, or Y, stream. We questioned whether transient neuronal populations exist in the PGN and can they possibly be related to the Y processing stream. We uncovered a transient, robust SMI-32 staining in the PGN of kittens aged 0 –34 days with the significant decline in the cellular density of labeled cells in older animals. According to the double-labeling, in all examined ...
Source: Anatomy and Embryology - January 24, 2024 Category: Anatomy Source Type: research
The superior colliculus projection upon the macaque inferior olive
AbstractSaccade accommodation is a productive model for exploring the role of the cerebellum in behavioral plasticity. In this model, the target is moved during the saccade, gradually inducing a change in the saccade vector as the animal adapts. The climbing fiber pathway from the inferior olive provides a visual error signal generated by the superior colliculus that is believed to be crucial for cerebellar adaptation. However, the primate tecto-olivary pathway has only been explored using large injections of the central portion of the superior colliculus. To provide a more detailed picture, we have made injections of ante...
Source: Anatomy and Embryology - January 19, 2024 Category: Anatomy Source Type: research
Amygdala structure and function and its associations with social-emotional outcomes in a low-risk preterm sample
This study reveals that low-risk prematurity does not have an effect on social-emotional outcomes or structural amygdala volu mes during young adulthood. However, individuals who were considered to be at a lower risk of exhibiting neurodevelopmental alterations following preterm birth demonstrated increased FC between the left and right amygdala and MedFC. (Source: Anatomy and Embryology)
Source: Anatomy and Embryology - January 18, 2024 Category: Anatomy Source Type: research
Inter-individual, hemispheric and sex variability of brain activations during numerosity processing
AbstractNumerosity perception is a fundamental and innate cognitive function shared by both humans and many animal species. Previous research has primarily focused on exploring the spatial and functional consistency of neural activations that were associated with the processing of numerosity information. However, the inter-individual variability of brain activations of numerosity perception remains unclear. In the present study, with a large-sample functional magnetic resonance imaging (fMRI) dataset (n = 460), we aimed to localize the functional regions related to numerosity perceptions and explore the inter-individua...
Source: Anatomy and Embryology - January 10, 2024 Category: Anatomy Source Type: research
Frequency-specific functional difference between gyri and sulci in naturalistic paradigm fMRI
This study highlights the advantages of nfMRI in depicting the functional difference between gyri and sulci, and provides novel insights into unraveling the relationship between brain structure and function. (Source: Anatomy and Embryology)
Source: Anatomy and Embryology - January 9, 2024 Category: Anatomy Source Type: research
Clustering the cortical laminae: in vivo parcellation
This study aims to offer a robust, whole-brain validation of T1 imaging as a practical and effective tool for exploring the laminar composition of the cortex. To do so, we cluster complex microstructural cortical datasets of both human (N = 30) and macaque (N = 1) brains using an adaptation of an algorithm for clustering cell omics profiles. The resulting cluster patterns are then compared to established atlases of cytoarchitectonic features, exhibiting significant correspondence in both species. Lastly, we demonstrate the expanded applicability of T 1 imaging by exploring some of the cytoarchitectonic features behind...
Source: Anatomy and Embryology - January 9, 2024 Category: Anatomy Source Type: research
Activation patterns in male and female forebrain circuitries during food consumption under novelty
AbstractThe influence of novelty on feeding behavior is significant and can override both homeostatic and hedonic drives due to the uncertainty of potential danger. Previous work found that novel food hypophagia is enhanced in a novel environment and that males habituate faster than females. The current study ’s aim was to identify the neural substrates of separate effects of food and context novelty. Adult male and female rats were tested for consumption of a novel or familiar food in either a familiar or in a novel context. Test-induced Fos expression was measured in the amygdalar, thalamic, striatal , and prefrontal c...
Source: Anatomy and Embryology - January 9, 2024 Category: Anatomy Source Type: research
Frequency-specific functional difference between gyri and sulci in naturalistic paradigm fMRI
This study highlights the advantages of nfMRI in depicting the functional difference between gyri and sulci, and provides novel insights into unraveling the relationship between brain structure and function. (Source: Anatomy and Embryology)
Source: Anatomy and Embryology - January 9, 2024 Category: Anatomy Source Type: research
Clustering the cortical laminae: in vivo parcellation
This study aims to offer a robust, whole-brain validation of T1 imaging as a practical and effective tool for exploring the laminar composition of the cortex. To do so, we cluster complex microstructural cortical datasets of both human (N = 30) and macaque (N = 1) brains using an adaptation of an algorithm for clustering cell omics profiles. The resulting cluster patterns are then compared to established atlases of cytoarchitectonic features, exhibiting significant correspondence in both species. Lastly, we demonstrate the expanded applicability of T 1 imaging by exploring some of the cytoarchitectonic features behind...
Source: Anatomy and Embryology - January 9, 2024 Category: Anatomy Source Type: research
Activation patterns in male and female forebrain circuitries during food consumption under novelty
AbstractThe influence of novelty on feeding behavior is significant and can override both homeostatic and hedonic drives due to the uncertainty of potential danger. Previous work found that novel food hypophagia is enhanced in a novel environment and that males habituate faster than females. The current study ’s aim was to identify the neural substrates of separate effects of food and context novelty. Adult male and female rats were tested for consumption of a novel or familiar food in either a familiar or in a novel context. Test-induced Fos expression was measured in the amygdalar, thalamic, striatal , and prefrontal c...
Source: Anatomy and Embryology - January 9, 2024 Category: Anatomy Source Type: research
