The olfactory bulb and medial hemisphere wall of the rat‐fish, <i>Chimaera</i>

Faucette, John R.

doi:10.1002/cne.901370402

Cited by 10 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, information on the relative sizes of sensory brain areas that receive primary projections from the sense organs have been used as indicators of the relative importance of a particular sensory system in fishes (Kotrschal et al 1998;Wagner 2001;Lisney and Collin 2006;). Brains from a number of chimaeroid species have been illustrated and described (Garman 1904;Jollie 1962;Smeets et al 1983;Liu 2001;Yopak and Montgomery 2008), while the brains of a small number of species have been subjected to a more detailed histological analysis (Faucette 1969;Kuhlenbeck and Niimi 1969;Smeets et al 1983). From the qualitative, external examination of chimaeroid brains it appears that the optic tectum, which is the primary projection site for the majority of retinal ganglion cell axons, and the anterior and posterior lateral line lobes (ALLLs and PLLLs), which contain the nuclei that receive primary projections from the electroreceptors and acousticolateralis systems, respectively, are enlarged.…”

Section: Electroreceptive Systemmentioning

confidence: 99%

A review of the sensory biology of chimaeroid fishes (Chondrichthyes; Holocephali)

Lisney

2010

Rev Fish Biol Fisheries

View full text Add to dashboard Cite

The chimaeroid fishes (Chondrichthyes: Holocephali) are a small, ancient and poorly studied group of cartilaginous fishes that have puzzled and intrigued taxonomists, ichthyologists and evolutionary biologists for over 100 years. Like their close relatives, the elasmobranchs (sharks, skates and rays), chimaeroids possess an extensive battery of sense organs that allow them to detect information about the external environment in order to find mates, locate food and preferred habitats and avoid predators. In recent years the sensory systems of elasmobranchs have received an up-swell of attention from biologists, which has resulted in a greater understanding of the sensory capabilities and behaviour of these fishes. However, very little recent work has been done on the chimaeroids. The aim of this review is to provide a survey of the existing literature on the major senses (vision, smell, taste, mechanoreception, hearing and electroreception) in chimaeroids, in order to stimulate and identify areas for future research. In chimaeroids information on sensory systems is largely restricted to one or two species (with the exception of some aspects of the visual system) and for some sensory systems essentially nothing is known. Most studies are anatomical in nature and so there is a demand for a greater degree of neurophysiological and behavioural assessment of sensory capability in these fishes. The majority of chimaeroids occupy deep-sea habitats and are becoming increasingly threatened by the expansion of deep-sea fisheries, so an understanding of the sensory biology and behaviour of chimaeroids may be important for the protection and management of these fascinating fishes.

show abstract

Section: Electroreceptive Systemmentioning

confidence: 99%

A review of the sensory biology of chimaeroid fishes (Chondrichthyes; Holocephali)

Lisney

2010

Rev Fish Biol Fisheries

View full text Add to dashboard Cite

show abstract

“…Finally, when reaching an appropriate target area (TA in Fig. 1), an axon probably follows local chemical cues and turns from the substrate pathway that it has been following (64,65 (3,15,(66)(67)(68)(69)(70)(71)(72)(73)(74)(75). Many axons growing through the anterior commissure are decussating axons and not true commissural axons.…”

Section: Substrate Pathwaysmentioning

confidence: 99%

“…The substrate pathway underlying the anterior commissure is probably a common feature of the vertebrate ontogeny, because the anterior commissure is a constant feature of the vertebrate forebrain (2,3,15,26,(66)(67)(68)(69)(70)(71)(72)(73)(74)(75). In mammals lacking a corpus callosum (nonplacental mammals), the anterior commissure increases in size as the neocortex increases (15,28).…”

Section: Substrate Pathwaysmentioning

confidence: 99%

Ontophyletics of the nervous system: development of the corpus callosum and evolution of axon tracts.

Katz¹,

Lasek²,

Silver³

1983

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

The evolution of nervous systems has included significant changes in the axon tracts of the central nervous system. These evolutionary changes required changes in axonal growth in embryos. During development, many axons reach their targets by following guidance cues that are organized as pathways in the embryonic substrate, and the overall pattern of the major axon tracts in the adult can be traced back to the fundamental pattern of such substrate pathways. Embryological and comparative anatomical studies suggest that most axon tracts, such as the anterior commissure, have evolved by the modified use of preexisting substrate pathways. On the other hand, recent developmental studies suggest that a few entirely new substrate pathways have arisen during evolution; these apparently provided opportunities for the formation of completely new axon tracts. The corpus callosum, which is found only in placental mammals, may be such a truly new axon tract. We propose that the evolution of the corpus callosum is founded on the emergence of a new preaxonal substrate pathway, the "glial sling," which bridges the two halves of the embryonic forebrain only in placental mammals.Increases in the number of central nervous system (CNS) neurons and in the complexity of the synaptic neuropil characterize the vertebrate phylogeny (1, 2). These increases are usually manifest as enlargements of specific CNS areas such as the cerebellum, the tectum, and the cerebrum. Local enlargements can be attributed to focal increases in the dominant class of vertebrate neurons-local circuit neurons-neurons with axons that extend only short distances in the CNS before synapsing (1).Local areas of the CNS are connected by another important class of neurons-projection neurons-which send their axons along a few long stereotyped routes to target areas far from their cell bodies. The white matter of the vertebrate CNS is composed largely of axon tracts of projection neurons, and many of the same major axon tracts can be identified throughout the vertebrates. Although the overall pattern of these major tracts appears to have been conserved during evolution (2-8), there are some significant variations. Frequently, the compactness of particular tracts varies, as in the spinal lemniscal tracts (2, 9-11). In some cases, the particular stereotyped route taken by homologous axons varies-e.g., the stereotyped routes of the corticospinal tracts differ among most primates, ungulates, rodents, and marsupials (12-14). Moreover, a few major vertebrate axon tracts have appeared with no apparent precursors. The most dramatic example is the (dorsal) corpus callosum, which is found only in placental mammals (15,16).The corpus callosum is a large interhemispheric commissure, and most axons of the corpus callosum interconnect homotopic neocortical areas (17)(18)(19)(20)(21)(22). for exceptions to this general rule.) Monotremes and marsupials have no dorsal corpus callosum (2,16,(26)(27)(28). Among the placental mammals, the corpus callosum generally increases as t...

show abstract

The accessory olfactory bulbs and the lateral telencephalic wall of the rat‐fish, Chimaera

Faucette

1969

J of Comparative Neurology

Self Cite

View full text Add to dashboard Cite

The lateral telencephalon of Chimaera possesses several unique features but also has nuclei and fiber systems homologous with those of other sub-mammalian vertebrates. Ventricular ridges, similar to those of reptiles, are quite evident. ACcessory olfactory bulbs are associated with the dorsal and ventral parts of each olfactory bulb. These contribute to the lateral olfactory tract.The internal granular layer caudal to the olfactory and the accessory bulbs blends with the anterior olfactory nucleus. Caudal to this nuclear area, the nuclei of the rostral telencephalon are well differentiated.Nuclear areas distinguishable in the lateral hemisphere include: the primordial dorsal pallium, the primordial piriform cortex, the primordial striatal and amygdaloid nuclei, and the lateral zone of the oHactory tubercle. These areas replace dorsal, dorsolateral, ventrolateral and ventral parts of the anterior olfactory nucleus, respectively. The primordial striatum is subdivided into hyperstriatum, neostriatum, paleostriatum augmentatum and paleostriatum primitivum. The amygdaloid area has anterior, corticomedial and basolateral nuclear groups. The basolateral area is best differentiated. The hyperstriatum forms a rostral ventricular eminence; the basolateral amygdaloid nucleus is present in a larger caudal ventricular ridge.Fiber tracts of the lateral wall include the lateral olfactory tract, the lateral corticohabenular tract, the lateral forebrain bundle and the stria terminalis. Nuclei of medial and lateral walls are interrelated through the hippocampal and the anterior commissures.

show abstract

The olfactory bulb and medial hemisphere wall of the rat‐fish, Chimaera

Cited by 10 publications

References 25 publications

A review of the sensory biology of chimaeroid fishes (Chondrichthyes; Holocephali)

A review of the sensory biology of chimaeroid fishes (Chondrichthyes; Holocephali)

Ontophyletics of the nervous system: development of the corpus callosum and evolution of axon tracts.

The accessory olfactory bulbs and the lateral telencephalic wall of the rat‐fish, Chimaera

Contact Info

Product

Resources

About