4.5 Article

Neuronal Cell Types in the Spinal Trigeminal Nucleus of the Camel Brain

Journal

BRAIN SCIENCES
Volume 13, Issue 2, Pages -

Publisher

MDPI
DOI: 10.3390/brainsci13020312

Keywords

camel; spinal trigeminal nucleus; neurons; Golgi

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The morphological study of neurons in the spinal trigeminal nucleus of camels using the Golgi impregnation method revealed at least 12 morphological types of neurons with various sizes, shapes, and appendages. These neurons exhibited unique adaptations, such as large dilatations especially at their dendritic branching points, suggesting evolutionary modifications in pain and temperature processing pathways. This study provides insights into the neural adaptations of camels living in harsh environments with frequent exposure to painful stimuli.
Neurons in the spinal trigeminal nucleus of a camel were morphologically studied by the Golgi impregnation method. The neurons were classified based on the size and shape of their cell bodies, the density of their dendritic trees, and the morphology and distribution of their appendages. At least 12 morphological types of neurons were found in the camel spinal trigeminal nucleus, including the following: stalked, islets, octopus-like, lobulated, boat-like, pyramidal, multipolar, round, oval, and elongated neurons. These neurons exhibited large numbers of various forms of appendages that arise not only from their dendrites but also from their cell bodies. Moreover, neurons with unique large dilatations especially at their dendritic branching points were also reported. The neurons reported in this study displayed an array of different sizes and shapes and featured various forms of appendages arising from cell bodies and dendrites. Such morphologically distinctive neuronal cell types might indicate an evolutionary adaptation to pain and temperature processing pathways at the level of the spinal trigeminal nucleus in camels, which traditionally live in a very harsh climatic environment and are frequently exposed to painful stimuli.

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