Neuronal types of the human cortical amygdaloid nucleus
| Autor: | Alberto A. Rasia-Filho, Maria Elisa Calcagnotto, Aline Dall’Oglio, Roman Reberger, Carlos Escobar Vásquez |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Adult Male Cortical amygdaloid nucleus Dendritic spine Dendritic Spines Sensory system Biology 03 medical and health sciences 0302 clinical medicine medicine Image Processing Computer-Assisted Humans Aged Neurons Neuronal Plasticity Corticomedial Nuclear Complex General Neuroscience Pyramidal Cells Limbic lobe Human brain Dendrites Middle Aged Golgi method Spine (zoology) Smell 030104 developmental biology medicine.anatomical_structure nervous system Synapses Neuron Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | The Journal of comparative neurology. 526(17) |
| ISSN: | 1096-9861 |
| Popis: | The human cortical amygdaloid nucleus (CoA) receives exteroceptive sensory stimuli, modulates the functions coded by the intrinsic amygdaloid circuit, and constitutes the beginning of the limbic lobe continuum with direct and indirect connections toward subcortical, allocortical, and higher order neocortical areas. To provide basic data on the human CoA, we characterized and classified the neurons using the thionin and the "single-section" Golgi method adapted for postmortem brain tissue and light microscopy. We found 10 different types of neurons named according to the morphological features of the cell body, dendritic branches, and spine distribution. Most cells are multipolar spiny neurons with two or more primary dendrites, including pyramidal-like ones. Three-dimensional reconstructions evidenced the types and diversity of the dendritic spines in each neuron. The unlike density of spines along dendritic branches, from proximal to distal ones, indicate that the synaptic processing and plasticity can be different in each CoA neuron. Our study provides novel data on the neuronal composition of the human CoA indicating that the variety of cells in this region can have phylogenetic, ontogenetic, morphological, and likely functional implications for the integrated human brain function. This can reflect both a more complex subcortical synaptic processing of sensory and emotional information and an adaptation for species-specific social behavior display. |
| Databáze: | OpenAIRE |
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