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Sunday, July 12, 2020 | History

1 edition of Observations on the development of the trigeminal nerve in the chick found in the catalog.

Observations on the development of the trigeminal nerve in the chick

Roscoe Conkling Main

Observations on the development of the trigeminal nerve in the chick

by Roscoe Conkling Main

  • 165 Want to read
  • 32 Currently reading

Published .
Written in English

    Subjects:
  • Poultry,
  • Anatomy,
  • UIUC,
  • Zoology,
  • Theses,
  • Trigeminal nerve

  • Edition Notes

    Statementby Roscoe Conkling Main
    The Physical Object
    Pagination33, [6] leaves, 6 leaves of plates :
    Number of Pages33
    ID Numbers
    Open LibraryOL25579021M
    OCLC/WorldCa426050537

      Observations on the development of the trigeminal nerve in the chick () ().jpg 2, × 3,; KB Osteopathic first aids to the sick - written for the sick people () ().jpg 1, × 2,; KB. Aberrant Nerve Fibre ins Human Development by j. D. BOYD and A. F. W1. HUGHES In Ramo yn Cajal describe ad variety of observations on neurogenesis in the chick embryo which were inconsistent with this theory. Among them were trigeminal nerve. The association was briefly commented on by Brachet ();.

    Studies on the development of the trigeminal nerve and ganglion led on to observations of the organisation of their corresponding motor and sensory regions of the central nervous system. His seminal observations and experiments on the developing hindbrain of mammal and bird embryos confirmed the long suggested but never agreed view that this.   Within the embryonic chick hindbrain, trigeminal motor neurons occupy rhombomere 2 (r2) and r3, whereas facial motor neurons occupy r4 and r5 (Lumsden and Keynes, ; Lumsden ). Trigeminal neurons are of branchiomotor (BM) type and project via a dorsal exit point in r2 to first branchial arch muscles.

      GAD2 expression in the PNS has been described in DRG (chick) and trigeminal ganglia (rat), and Gad2 knockout mice are sensitised to pain [44–46]. Neuronal nicotinic receptors composed of α3β4 subunits that are more restricted in expression than other subtypes, are present and show specific functions in the trigeminal ganglion of rat [47–49]. We found that, in the turtle, mandibular and maxillary ganglion neuron rostrocaudal segregation and trigeminal tract somatotopy are similar to mouse. In contrast, chick mandibular ganglion neurons are located rostrally to maxillary neurons, with some intermingling, supporting previous observations (Noden [], J Comp Neurol ).


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Observations on the development of the trigeminal nerve in the chick by Roscoe Conkling Main Download PDF EPUB FB2

Trigeminalnerve,heregiven,willhebaseduponLillie'stext- book,"The Development of theChick", The remaining stages, beginningwith a chick embryo of ninety-four hours'incubation. Observations on the development of the trigeminal nerve in the chick / By Roscoe Conkling Main. Abstract. (M.A.)--University of Illinois, Includes bibliographical references (leaves ).Mode of access: InternetAuthor: Roscoe Conkling Main.

uction. oneofthemostconstant. In a previous study on the peripheral development of the trigeminal nerve, it was observed that the ophthalmic region of ectoderm seemed to undergo gangliogenesis while staying within the surface ectoderm (KURATANI and TANAKA, ).

By apply-ing immunohistochemical techniques to the whole. The development of the trigeminal motor nucleus in the chick embryo was studied using autoradiographic, cell staining, fiber staining, and axonal transport techniques.

The generation of cells and the naturally occurring neuronal death was studied in the trigeminal motor neuron pool in normal and tubocurare treated chick embryos between the 5th and 18th days of incubation.

3H-thymidine autoradiography revealed that the generation time extends from the 2nd to the 5th day of incubation, wherein about 50% of trigeminal motoneurons are born on the 3rd day. The developing mesencephalic trigeminal nucleus (nucleus of the fifth cranial nerve; Mes5) is composed of four neuron populations: 1) the medial group, located at the tectal commissure; 2) the lateral group distributed along the optic tectum hemispheres; 3) a group outside the neural tube; and 4) a population located at the posterior commissure.

The trigeminal nerve originates in the Gasserian ganglion and establishes a synapse with the sensory nucleus of the trigeminal nerve in the brain stem.

The sensory nucleus of the trigeminal nerve communicates with the motor nucleus of the vagal nerve by internuncial fibers.

Source: Adapted from Schaller et al The olfactory (yellow), lens (blue), trigeminal (green), otic (purple) and epibranchial (orange) placodes locate to characteristic positions here shown in a side view of a 3-day-old chick embryo. Their derivatives are shown with sense organs on the right and cranial ganglia on the left.

Adapted from D’Amico-Martel and Noden, The development of cerebellar afferents has been studied in the clawed toad, Xenopus laevis, from stage 46 to 64, with the horseradish peroxidase retrograde tracer technique. Already in stage 48 tadpoles, i.e. before the formation of the limbs, a distinct set of cerebellar afferents was found.

Vestibulocerebellar (mainly arising bilaterally in the nucleus vestibularis caudalis) and. In mice, the ophthalmic, maxillary, and mandibular trigeminal nerve branches maintain a somatotopic segregation and generate spatially organized patterns of connectivity within hindbrain target nuclei.

To investigate conservation of somatotopic organization, we compared trigeminal nerve organization in turtle, chick, and mouse embryos.

Development of the trigeminal nerve branches was studied in stage to chick embryos stained with an antibody to neurofilament protein. The following findings were obtained. The pathophysiology of trigeminal neuralgia is not clear.

According to clinical observations, it is probably induced by compression of the trigeminal nerve at its origin by the brainstem, blood vessels or a tumour. The local pressure causes demyelination, which results in abnormal depolarization and finally produces ectopic pulses. Their development was once thought to be independent, in line with their independent functions.

However, recent forms the sensory component of the fifth cranial nerve (the trigeminal nerve) that mediates pain, touch and temperature Mansour, ). This observation is reminiscent of certain fish species in which the inner ear and lateral. detail the development of the spinal nerves in the Newt.

Our observations only confirm Ms on this point. The Cranial nerves, like the spinal, arise as paired lateral outgrowths of the neural ridge, being completely separate from the epiblast. Figs. 17, 18, and 19 illustrate those outgrowths, which give rise respectively to the 3rd, 5th, and 7th.

These results are consistent with observations that ectopic SHH administration in chick embryos leads to abnormal trigeminal nerve development. In order to a investigate the mechanisms underlying this phenotype, we first explored a role for apoptosis using TUNEL staining together with tissue specific markers and Wnt1Cre;R26RYFP reporter mice.

In the chick, trigeminal ganglion neurons are generated between E2 and E5 (Hamburger and Hamilton stage 12–24), and are both placode and neural crest-derived cells [5, 33, 34, 38, 45]. Ophthalmic and maxillomandibular primordia of the ganglion fuse and form a bilobed structure.

Development of the mesencephalic tract of the trigeminus. Unlike most anamniotes studied so far, in amniotes a significant feature of the early dorsal mesencephalon is the DTmesV (Easter et al. In the chick, the first DTmesV neurones appeared towards the end of HH   Development of functional units within trigeminal ganglia correlates with increased expression of proteins involved in neuron–glia interactions - Volume 6 Issue 3.

Growth of trigeminal ganglion (TG) neurons After 18 h in culture, chick TG neurons were firmly attached to the substrate. Neurons exhibited development of neuritic processes and had phase-bright, round somatic morphology (Banker and Goslin, ). Neurons continued to grow and were used in tests 1–6 days after initiation of the cell culture.

A similar pattern of development of trigeminal motor neurons has also been described in the chick embryo (Heaton and Moody, ; Simon et al., ). Once outside of the hindbrain, axons of the nV neurons extend ventrally along the posterior edge of the eye (Fig.

5 F, o), and by 48 hr the axons turn posteriorly (Fig. 6 C, arrowhead). Immunostaining with the neural crest cell marker, HNK-1, indicated that the emigrated neuroepithelial cells were HNK-1 negative. It is concluded that in the chick embryo some neuroepithelial cells emigrate at the site of attachment of the trigeminal nerve, migrate into the ganglion and then into the mesenchyme of the first arch.Axial magnetic resonance imaging scan from a year-old woman after a prior microvascular decompression with recurrent trigeminal neuralgia.

Top, Note the tissue mass (arrow) just lateral to the trigeminal nerve. Gamma knife radiosurgery was performed with one 4-mm isocenter targeted to the proximal trigeminal nerve.