The nucleus magnocellularis in the red-eared turtle, Chrysemys scripta elegans: Eighth nerve endings and neuronal types

Browner, Robert H.; Marbey, Debra

doi:10.1016/0378-5955(88)90156-6

Cited by 17 publications

(7 citation statements)

References 40 publications

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“…This important axosomatic terminal is found in turtles (Browner and Marbey, 1988), alligator lizards (Szpir et al, 1990), chicken (Jhaveri and Morest, 1982), barn owl (Carr and Boudreau, 1991), mouse (Limb and Ryugo, 2000), guinea pig (Tsuji and Liberman, 1997), cat (Ryugo et al, 1996, 1998), rhesus monkey (Ryugo, unpublished observations), and human (Adams, 1986). The large size and evolutionary conservation of this synaptic terminal indicates it importance in hearing (From Ryugo and Parks, 2003).…”

Section: Figuresmentioning

confidence: 98%

Synaptic morphology and the influence of auditory experience

et al. 2011

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The auditory experience is crucial for the normal development and maturation of brain structure and the maintenance of the auditory pathways. The specific aims of this review are (i) to provide a brief background of the synaptic morphology of the endbulb of Held in hearing and deaf animals; (ii) to argue the importance of this large synaptic ending in linking neural activity along ascending pathways to environmental acoustic events; (iii) to describe how the re-introduction of electrical activity changes this synapse; and (iv) to examine how changes at the endbulb synapse initiate trans-synaptic changes in ascending auditory projections to the superior olivary complex, the inferior complex, and the auditory cortex.

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Section: Figuresmentioning

confidence: 98%

Synaptic morphology and the influence of auditory experience

et al. 2011

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“…Each collateral branch descends ventrally to form a single endbulb on a NM cell body and the distribution of the endings corresponds to the tonotopic organization of the nucleus [165,201]. Endbulbs are a large calyx-like axosomatic ending formed by auditory nerve fibers in a wide variety of terrestrial vertebrates, including turtles [24], lizards [199], birds [31,78,140], mice [22,102], guinea pigs [208], cats [103,170,175], and humans [1]. The endbulb arises from the main axon as several gnarled branches that arborize repeatedly to enclose the postsynaptic cell in a nest of en passant swellings and terminal boutons (Fig.…”

Section: Innervationmentioning

confidence: 99%

Primary innervation of the avian and mammalian cochlear nucleus

Ryugo¹,

Parks²

2003

Brain Research Bulletin

115

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The auditory nerve of birds and mammals exhibits differences and similarities, but given the millions of years since the two classes diverged from a common ancestor, the similarities are much more impressive than the differences. The avian nerve is simpler than that of mammals, but share many fundamental features including principles of development, structure, and physiological properties. Moreover, the available evidence shows that the human auditory nerve follows this same general organizational plan. Equally impressive are reports that homologous genes in worms, flies, and mice exert the same heredity influences in man. The clear implication is that animal studies will produce knowledge that has a direct bearing on the human condition.

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“…There is some evidence that this is the case. The medial NA of the alligator lizard contains multipolar cells [Spzir et al, 1995] as does the turtle NA [Miller and Kasahara, 1979;Browner and Marbey, 1988]. Multipolar cells are also present in the dorsal medullary nucleus of the frog .…”

Section: Discussionmentioning

confidence: 94%

A Morphological Study of the Cochlear Nuclei of the Pigeon (Columba livia)

et al. 1999

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The pigeon cochlear nucleus angularis (NA) and nucleus magnocellularis (NM) were analyzed with Golgi and Nissl techniques. NA was divided into a medial NAm and NA proper, which could be subdivided further into an intermediate NAi and lateral NAl. NAm contained a mostly homogeneous population of a unique multipolar cell type with very short dendrites and large somatic spines. NA proper contained four cell types: large, medium, and small multipolars, and medium bipolar. The medium multipolar cells were most common, and resembled the multipolar cells of the mammalian ventral cochlear nucleus. NM presented a homogenous appearance with a mediolateral gradient of cell size and shape. Medially located higher best frequency NM principal cells had round cell bodies with small somatic spines and few dendrites. By comparison, laterally located low best frequency NM stellate cells had more dendrites and spindle shaped cell bodies. The similarities between the cell types of NA and the cell types in the cochlear nuclei of other amniote vertebrates may be due to homology or convergent evolution.

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The nucleus magnocellularis in the red-eared turtle, Chrysemys scripta elegans: Eighth nerve endings and neuronal types

Cited by 17 publications

References 40 publications

Synaptic morphology and the influence of auditory experience

Synaptic morphology and the influence of auditory experience

Primary innervation of the avian and mammalian cochlear nucleus

A Morphological Study of the Cochlear Nuclei of the Pigeon (Columba livia)

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