The cranial nerves of siren lacertina

Norris, H. W.

doi:10.1002/jmor.1050240204

Cited by 57 publications

(16 citation statements)

References 17 publications

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“…Later in the same study (page 208), he assigned one remaining ramus of the ramus mandibularis to be homologous to the ramus maxillaris of other amphibians. Furthermore, Paterson compared the origin and branching pattern to those in different urodele amphibians ( Siren : Norris ; Proteus : Benedetti 1933; Salamandra : Francis, 1934). He argued that the branching pattern of the ramus maxillaris of X. laevis is more similar to the pattern found in urodeles than in other anurans.…”

Section: Discussionmentioning

confidence: 99%

Three‐dimensional reconstruction of the cranial and anterior spinal nerves in early tadpoles of Xenopus laevis (Pipidae, Anura)

Naumann

Olsson

2017

J of Comparative Neurology

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Xenopus laevis is one of the most widely used model organism in neurobiology. It is therefore surprising, that no detailed and complete description of the cranial nerves exists for this species. Using classical histological sectioning in combination with fluorescent whole mount antibody staining and micro-computed tomography we prepared a detailed innervation map and a freely-rotatable three-dimensional (3D) model of the cranial nerves and anterior-most spinal nerves of early X. laevis tadpoles. Our results confirm earlier descriptions of the pre-otic cranial nerves and present the first detailed description of the post-otic cranial nerves. Tracing the innervation, we found two previously undescribed head muscles (the processo-articularis and diaphragmatico-branchialis muscles) in X. laevis. Data on the cranial nerve morphology of tadpoles are scarce, and only one other species (Discoglossus pictus) has been described in great detail. A comparison of Xenopus and Discoglossus reveals a relatively conserved pattern of the post-otic and a more variable morphology of the pre-otic cranial nerves. Furthermore, the innervation map and the 3D models presented here can serve as an easily accessible basis to identify alterations of the innervation produced by experimental studies such as genetic gain- and loss of function experiments.

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Section: Discussionmentioning

confidence: 99%

Three‐dimensional reconstruction of the cranial and anterior spinal nerves in early tadpoles of Xenopus laevis (Pipidae, Anura)

Naumann

Olsson

2017

J of Comparative Neurology

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“…Allis [1920] ascribed eight branches to the typical branchial nerve by adding the ramus dorsalis and subdividing the ram us posttrem aticus into four parts. Norris [1924] agreed in principle with A llis' illum inating portrayal of a typical branchial nerve and was of the opinion th at the specific num ber of posttrem atic rami is not significant when they are of similar com position. The arrangem ent of the branches of a typical branchial nerve of A llis as figures by Norris is shown in fig.…”

Section: Fig 2 Reproduction Of Norris'mentioning

confidence: 53%

“…The following account of the interrelationships between the cranial nerves and the vertebrate pharynx has been synthesized from the descriptions of Allis [1889Allis [ ,1897Allis [ ,1917Allis [ ,1920Allis [ ,1922Allis [ and 1923, Herrick [1899Herrick [ , 1900Herrick [ , 1901, K n ou ff [1927], Norris (1913Norris ( , 1925 [1890,1892,1903,1904].…”

Section: Structure Of the Vertebrate Pharynxmentioning

confidence: 99%

The Trematic Interrelationships of the Branchiomeric Nerves

Smith¹

1959

Cells Tissues Organs

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“…in an exceptionally thorough analysis and argument, disagrees with this interpretation, and considers the spinal nucleus to be 'nothing else but part of the fore most spinal roots' (p. 341). He cites the fact that the trape zius muscle is innervated by spinal nerves as well as by the spinal component of XI [48], and evidence that the trape zius has a myotomal origin (at this time it was assumed that branchiomeric musculature originated from anterior lateral plate mesoderm). Addens identified a spinal component in fishes, and this was widely ignored by subsequent work…”

Section: The Evolution Of the Vagus And Accessory Nervesmentioning

confidence: 99%

Brainstem Organization and Branchiomeric Nerves

Wake

1993

Cells Tissues Organs

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The branchiomeric portion of the vertebrate head represents a region of specialized function and, at the same time, a transition between head and body. Recent experimental work has called into question the ‘visceral’ nature of the branchiomeres, interpreting them instead within the framework of the segmentation of the body, as is seen clearly in rhombomeres. The vagus nerve is critical to our understanding of this region. It is usually viewed as a serial homologue of dorsal roots of spinal nerves, and the hypoglossal, with its several roots, has been seen as arising from associated ventral roots. The accessory is often considered to have been derived directly from the vagus, having become individuated in tetrapods in general and especially in amniotes. Work on amphibians is examined with respect to these issues, and within structuralist, functionalist and phylogenetic frameworks. The accessory in mammals and birds is a composite; the spinal motor nucleus, which can be traced at least to elasmobranchs, is distinctly different in origin from the more recently added bulbar portion, which is derived from the vagus. The spinal portion appears to have evolved independently of the system associated with branchially derived musculature. The hypoglossal is derived from ventral-column material, but it is not clearly associated with the vagus phylogenetically.

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The cranial nerves of siren lacertina

Cited by 57 publications

References 17 publications

Three‐dimensional reconstruction of the cranial and anterior spinal nerves in early tadpoles of Xenopus laevis (Pipidae, Anura)

Three‐dimensional reconstruction of the cranial and anterior spinal nerves in early tadpoles of Xenopus laevis (Pipidae, Anura)

The Trematic Interrelationships of the Branchiomeric Nerves

Brainstem Organization and Branchiomeric Nerves

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