scholarly journals Lateral line sensory cells are not swamped by natural flow

2019 ◽  
Vol 222 (2) ◽  
pp. jeb196600
Author(s):  
Kathryn Knight
Keyword(s):  
Lateral Line ◽  
Sensory Cells ◽  
Natural Flow

A Study on the Fine Structure of the Lateral Line Organ of the Sea Eel

1973 ◽  
Vol 31 ◽  
pp. 648-649
Author(s):  
K. Hama
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Lateral Line ◽  
Low Frequency ◽  
Sensory Cells ◽  
Apical Surface ◽  
Voltage Electron ◽  
Sensory Epithelia ◽  
Low Frequency Vibration ◽  
Transmission Electron

The lateral line organs of the sea eel consist of canal and pit organs which are different in function. The former is a low frequency vibration detector whereas the latter functions as an ion receptor as well as a mechano receptor.The fine structure of the sensory epithelia of both organs were studied by means of ordinary transmission electron microscope, high voltage electron microscope and of surface scanning electron microscope.The sensory cells of the canal organ are polarized in front-caudal direction and those of the pit organ are polarized in dorso-ventral direction. The sensory epithelia of both organs have thinner surface coats compared to the surrounding ordinary epithelial cells, which have very thick fuzzy coatings on the apical surface.

Electroreceptors and Direction Specific Arrangement in the Lateral Line System of Salamanders?

1981 ◽  
Vol 36 (5-6) ◽  
pp. 493-496 ◽  
Author(s):  
Bernd Fritzsch
Keyword(s):  
Lateral Line ◽  
Fiber Bundles ◽  
Sensory Cells ◽  
Lateral Line System ◽  
Line System ◽  
Lateral Line Organ ◽  
Posterior Lateral Line ◽  
Afferent Fibers ◽  
Lateral Line Afferents ◽  
Line Organ

Abstract The arrangement of the lateral line afferents of salamanders as revealed by transganglionic staining with horse­ radish peroxidase is described. Each lateral line organ is supplied by two fibers only. In the medulla these two afferent fibers run in separate fiber bundles. It is suggested, that only those fibers contacting lateral line sensory cells with the same polarity form together one bundle. Bundles formed by anterior or posterior lateral line afferents are also clearly separated. Beside the lateral line organs smaller pit organs are described. These organs are supplied by one afferent only which reveals an arrangement in the medulla different from that of the lateral line afferents. Based on anatomical facts, these small pit organs are considered to be electroreceptors. Centrifugally projecting neurons, most probably efferents, are described in the medulla.

The fine structure of ampullary electric receptors in Amiurus

1964 ◽  
Vol 160 (980) ◽  
pp. 345-359 ◽  
Keyword(s):  
Fine Structure ◽  
Lateral Line ◽  
Cell Group ◽  
Sensory Cells ◽  
Receptor Cells ◽  
Pit Organ ◽  
Accessory Cells ◽  
Myelinated Nerves ◽  
Square Array ◽  
Small Nerve

The small pit-organs of Amiurus have been included in the group of ampullary lateral-line organs. On morphological and physiological grounds these ampullary organs are thought to be electric receptors and not mechano-receptors; thus they can be distinguished from all other types of acoustico-lateralis organs of vertebrates. Each small pit-organ consists of a duct leading from the surface of the skin to an ampulla, beneath which there is a group of cells lying at the base of the epidermis. There are two main types of cells in this group: the receptor and the accessory cells. The apical surfaces of the receptor cells bear microvillae but no cilia: these microvillae project into the lumen of the ampulla. Myelinated nerves supply the organs at the base ; they lose their myelin sheaths before entering the cell group where they branch and innervate the receptor cells. Small nerve terminals are closely applied to the surface of the receptor cells and in some places are thought to be in synaptic contact. Near these regions characteristic dense bodies are found in the base of the receptor cells. The bodies are surrounded by an accumulation of small vesicles of about 300 to 500 Å in diameter; they resemble structures found in corresponding situations in other types of sensory cells. Dense inclusions are found in some receptor cells: these inclusions have a highly ordered fine structure which in some sections appears as a square array of dense dots having a centre-to-centre spacing of about 75 Å. These observations are discussed in relation to the supposed activity of small pit-organs as electric receptors and to their position in the group of ampullary lateral-line organs.

Sensory Cells and Pigment Distribution in the Tail of the Ammocoete

1951 ◽  
Vol s3-92 (19) ◽  
pp. 233-247
Author(s):  
D. M. STEVEN
Keyword(s):  
Lateral Line ◽  
Free State ◽  
Sensory Cells ◽  
Light Reaction ◽  
Lampetra Planeri ◽  
Colour Changes ◽  
Pigment Distribution

The ammocoete of Lampetra planeri (Bloch) contains a single carotenoid, lutein, partly esterified and partly in the free state. The pigment is distributed in lipophores in the sub-dermal tissues, and plays no part in the colour changes of-the animal. The epidermis of the tail contains numerous sensory cells of a type previously undescribed, which satisfy the requirements predicted for the photoreceptors responsible for the light reaction of the animal. Evidence is presented that these sensory cells are innervated by branches of the lateral line nerves. Similarities are indicated between the sensory cells of the ammocoete and simple photoreceptor systems of certain invertebrates.

scholarly journals THE ULTRASTRUCTURE OF THE KINOCILIUM OF THE SENSORY CELLS IN THE INNER EAR AND LATERAL LINE ORGANS

1965 ◽  
Vol 25 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Åke Flock ◽  
Arndt J. Duvall
Keyword(s):  
Inner Ear ◽  
Lateral Line ◽  
Basal Body ◽  
Teleost Fish ◽  
Receptor Cell ◽  
Sensory Cells ◽  
Directional Sensitivity ◽  
Sensory Hairs ◽  
Basal Foot

The bundle of sensory hairs protruding from the top of each receptor cell in the vestibular and lateral line organs in the teleost fish (burbot) Lota vulgaris is composed of a number of stereocilia and one kinocilium located in the periphery of the bundle. The ultrastructure of the kinocilium and its basal body is described. It is found that the kinocilium is morphologically polarized by the asymmetric arrangement of its component fibers and of the basal body by the presence of a basal foot. Peripheral fibers 5 and 6 of the kinocilium and the basal foot of the basal body are oriented away from the stereocilia; that is, in a direction coinciding with the direction of excitatory stimulation. The findings are discussed in terms of directional sensitivity.

The Development of the Lateral Line System in Plaice (Pleuronectes Platessa) and Turbot (Scophthalmus Maximus)

1986 ◽  
Vol 66 (3) ◽  
pp. 683-693 ◽  
Author(s):  
D. A. Neave
Keyword(s):  
Lateral Line ◽  
Scophthalmus Maximus ◽  
Sensory Cells ◽  
Lateral Line System ◽  
Blind Side ◽  
Canal System ◽  
Line System ◽  
Pleuronectes Platessa ◽  
Body Regions ◽  
Turbot Scophthalmus Maximus

The distribution of free neuromasts and the formation of the lateral line canals are described for two species of flatfish (plaice, Pleuronectes platessa L., and turbot, Scophthalmus maximus L.) during development from the bilaterally symmetrical larva to the bilaterally asymmetrical adult. On hatching plaice have three free neuromasts per side compared with six in turbot. After feeding is established plaice have 40–60/side compared with 20–25 in turbot. During development the ‘hillock’ of sensory cells increases in size and the cupulae grow in length. Canal formation starts later in plaice than in turbot. During metamorphosis the canal system becomes more concentrated in the upper (eyed) side of both species, but lateral line canals occur both on the head and body regions of the blind side. In plaice the tubes leading from the canals to the surface have typically one pore/tube, whereas in turbot there is much branching with 8–10 pores/tube.

Sign in / Sign up

Export Citation Format

Share Document