Morphometric Comparison of the Motor Trigeminal Neurons

Setoyama, Satoru; Zhou, Ming; Goto, Noboru; Shimada, Kazuyuki

doi:10.2535/ofaj1936.73.6_301

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…In the brainstem, a comparative morphometric study between an alligator, a human being and a rat was carried out on the motor trigeminal neurons, which innervate muscles for mastication, after making serial sections 27 . The average area of motor trigeminal neurons was the largest in the alligator followed by the human being and the rat.…”

Section: Neuronal Differencesmentioning

confidence: 99%

Morphometric evaluations of the human nervous system

Goto

2006

Human Cell

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It is very important to evaluate and accurately understand the various conditions of the human nervous system. In this review article, we introduce several morphometric reports that are proven to be accurate from the view point of various errors (range of tissue shrinkage ratios, microscopic multiple counting, artifacts of microscopic structures, etc.). We review the following aspects of the selected reports: methodology, developmental research, neuronal differences, gender differences, aging process and miscellaneous (nerve fibers, unmyelinated fibers, in relation to neuropathology, clinical image-analysis and immunohistochemistry).

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Section: Neuronal Differencesmentioning

confidence: 99%

Morphometric evaluations of the human nervous system

Goto

2006

Human Cell

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“…Площа нейронів середньомозкового ядра трійчастого нерва поступово збільшується з гестаційним віком, різноманітність нейронних ділянок з'являється після 32 тижня вагітності, але кількість і форма нейронів мало змінюється протягом внутрішньоутробного розвитку людини [5]. Нейрони головного ядра трійчастого нерва дозрівають приблизно на 33 тижні внутрішньоутробного розвитку, щільність нейронів зменшується з гестаційним віком [6,14,18].…”

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Morphometric Parameters of the Human Fetus Pons 17-18 Weeks of Intrauterine Development

Lopatkina,

Tykholaz,

Shkolnikov

2023

Med. Sci. of Ukr.

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Relevance. Currently, increased interest is observed in the early stages of postnatal ontogenesis in research of age-related changes in the systems of the human body. Aim: To define the macrometric parameters of the pons of human fetuses of 17-18 weeks of fetal development, the sizes and area of the cranial nerve nuclei contained in pons, as well as the size and area of the nerve cells that form these nuclei. Materials and methods: We performed an anatomical and histological examination of 10 human fetuses at the stage of 17-18 weeks of intrauterine development. Results: The boundaries of the nucleus of the abductor nerve are unclear, the neurons of the nucleus are spherical or rounded in shape. The vestibular nucleus of the vestibulocochlear nerve has an indeterminate shape, the boundaries of the nucleus are not clear, neurons with different areas of the nucleus are noted, from large to small. The motor nucleus of the facial nerve has an elongated shape, with not clear outer edges, the nerve cells are dome-shaped. The principal nucleus of the trigeminal nerve has a rounded shape. Conclusions: We established that at 17-18 weeks of intrauterine development of human fetuses, the nucleus of the abductor nerve, the motor nucleus of the facial nerve, the principal nucleus of the trigeminal nerve, and the vestibular nucleus of the vestibulocochlear nerve were visualized. Nucleus of the abductor nerve has the largest area, the smallest -has the vestibular nucleus of the vestibulocochlear nerve. The largest area of neurons of the vestibular nucleus was established in comparison with the area of the nucleus of the facial, trigeminal and abductor nerves. The diameter and area of the nuclei of the cells of the abductor nerve, the motor nucleus of the facial nerve, and the principal nucleus of the trigeminal nerve have almost the same size, while the area of the neurons of the vestibulocochlear nerve is different, there is a group of neurons with a large area, and there is a group with a much smaller area of neurons.

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Morphometric Comparison of Human Nerve Cells: Special Sensory System

Takaoki

Nonaka

Goto

et al. 2005

Okajimas Folia Anat. Jpn.

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Summary: We compared morphometric data on various nerve cells in the human special sensory system using the modified Klü ver-Barrera staining method with an extremely minimized shrinkage ratio and an image-analyzer. According to the measurement data of cell-body sizes, we classified nerve cells of the various nerve nuclei in the special sensory system into three groups. These data are of interest to better understand the process of nerve conduction in the special sensory system.There have been several qualitative reports on the morphology of various brainstem nuclei in humans1,2). Quantitative evaluations, however, are fairly rare, especially with methods minimizing shrinkage ratio. The aim of this study is to bring to light morphological and morphometrical comparisons of various nuclei in the special sensory system.The special sensory system consists of the visual pathway (lateral geniculate body), the auditory pathway (ventral cochlear nucleus; dorsal cochlear nucleus; medial superior olivary nucleus; inferior collicular nucleus; medial geniculate body), the gustatory pathway (solitary tract nucleus) and the olfactory pathway. We studied morphological and morphometrical data regarding the abovementioned nuclei. MethodsUsing an image-analyzer equipped with a microscope and tissue sections stained with a special method (modified Klü ver-Barrera staining method [K-B] after secondary fixation in chromic acid and embedding in celloidine3), we examined the nerve cells in the special sensory system. We studied the brainstem nuclei after making serial K-B sections (40 mm thick) of the brainstem and cerebellum in a 63-year-old female. Neurons for each nucleus (39 to 269 in number) were selected for measurement.For the measurement of the neuronal areas, an image analyzing system was adopted: Soft Imaging System GmbH equipped with a microscope (Olympus BX 40) and a computer (Dell Precision 530). Enlarged images (40 times) of the neurons on the liquid crystalline viewer were measured with a pencil-type tracer (Wacom FAVO F630) to trace the contour of neurons having a nucleolus in the nucleus. ResultsNeuromorphological comparisons (see Fig. 1)The lateral geniculate nucleus showed six laminations of neurons when it was observed on the coronary section: Layers 1-6 from the bottomup. Among these layers, layers 1 and 2 consisted of larger oval medium size neurons (LGN1 and LGN2), while layers 4 and 5 consisted of rather smaller oval medium size neurons (LGN4 and LGN5).In the inferior collicular nucleus (ICN), the majority of neurons were small, oval, pyriform, spindle

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Morphometric Comparison of the Motor Trigeminal Neurons

Cited by 5 publications

References 27 publications

Morphometric evaluations of the human nervous system

Morphometric evaluations of the human nervous system

Morphometric Parameters of the Human Fetus Pons 17-18 Weeks of Intrauterine Development

Morphometric Comparison of Human Nerve Cells: Special Sensory System

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