scholarly journals The Effect of Efferent Stimulation on the Phase and Amplitude of Extracellular Receptor Potentials in the Lateral Line System of the Perch (Perca Fluviatius)

1983 ◽  
Vol 102 (1) ◽  
pp. 223-238 ◽  
Author(s):  
I. J. RUSSELL ◽  
D. A. LOWE
Keyword(s):  
Lateral Line ◽  
Low Frequency ◽  
Receptor Potential ◽  
Mechanical Stimulus ◽  
Lateral Line System ◽  
Phase Lag ◽  
Low Frequencies ◽  
Line System ◽  
Lateral Line Nerve ◽  
Centre Frequency

1. Microphonic and summating potentials were recorded extracellularly from lateral line organs in the suborbital canal of the perch in response to sinusoidal movements of canal fluid. 2. These potentials were changed in amplitude, shape and phase, relative to the mechanical stimulus, by electrical stimulation of efferent fibres in the lateral line nerve. 3. The receptor potential amplitude/stimulus intensity relationships for the microphonic and summating potentials saturated at high levels of stimulation, and at progressively lower amplitudes with increasing frequencies of mechanical stimulation. Efferent stimulation tended to reduce this rate of saturation. 4. Amplitude versus frequency relationships plotted at different stimulus intensities for the microphonic potential showed that the lateral line organs were most sensitive to frequencies between 35–65 Hz (centre frequency), and at these frequencies efferent stimulation caused the greatest increase in amplitude. 5. Analysis of the second order and third order harmonic components of the microphonic showed that these were reduced by efferent stimulation and that the strongest reduction occurred at the centre frequency. 6. The phase of the receptor potential led that of the mechanical stimulus at very low frequencies by nearly 90°. This changed to zero phase at the centre frequency and to a phase lag at higher frequencies. Efferent stimulation caused no change in phase of the microphonic relative to the control state at the centre frequency, but caused a progressive phase lead and lag as the frequency was decreased and increased respectively about the centre frequency. 7. In the linear response range, the lateral line organs responded as critically damped low frequency resonators to the velocity of the stimulus. Efferent stimulation appeared to alter the damping of this resonance. The possibility is discussed that efferent stimulation can alter the mechanical properties of the lateral line hair cells.

scholarly journals The mechanism of the lateral sense organs of fishes

1937 ◽  
Vol 123 (833) ◽  
pp. 472-495 ◽  
Keyword(s):  
Lateral Line ◽  
Cranial Nerves ◽  
Sensory System ◽  
Low Frequency ◽  
Lateral Line System ◽  
Sense Organs ◽  
Line System ◽  
Morphological Studies ◽  
Low Frequency Vibration ◽  
Functional Features

For a long time after their discovery in the seventeenth century the lateral-line canals of fishes were considered to be mucus-secreting organs. In 1850 Leydig described sense organs in the lateral-line canals, and this discovery stimulated a keen interest in the investigation of both the morphological and functional features of the lateral-line system. Morphological studies have yielded a thorough understanding of the structure of these organs (Ewart and Mitchell 1892; Cole 1896; Johnson 1917; von Woellwarth 1933). Physiological studies, though numerous, have been less fruitful. An account of the older work was given by Baglioni (1913), and the more recent work is reviewed by Dykgraaf (1933). The only technique until recently available has been the elimination of the sensory system by nerve section and cauterization, and the comparison of the behaviour of intact and operated fishes in response to various stimuli. With so diffuse a structure as the lateral-line system, receiving its nerve supply from the fifth, seventh, ninth and tenth cranial nerves, this method is particularly inadequate, and involves a violent mutilation of the animal. When one considers the crudity of many of these operations, it is not the uncertainty of the results which is remarkable, but rather that some of the conclusions reached should remain valid to-day in the light of far more penetrating experimental analysis. This method of organ elimination could yield at best only an indication of the kind of stimulus that is effective in evoking the excitation of lateral-line receptors. In current textbooks the conclusion of Parker (1904) that the effective stimulus for the lateral line is low-frequency vibration, and that of Hofer (1907) that it is movement of water (i. e. local currents) have received most notice. The observations of Dykgraaf (1933), who employed the more refined methods of von Frisch’s futterdressur technique, support Hofer’s conclusion, and to some extent also Parker’s. Dykgraaf considers the lateral-line system to be an organ of Ferntastsinn , and if this is taken to mean a mechanoreceptor of such sensitivity that it can function both as a touch organ and as a receptor for disturbances coming from a distance, it is undoubtedly a true description, for it is fully confirmed by the direct electrophysiological studies of Hoagland (1933 a, b, c and d ) and of Schriever (1935). The latter, apparently unacquainted with Hoagland’s work, did little more than to confirm several of his observations.

scholarly journals The Inner Ear is Responsible for Detection of Infrasound in the Perch (Perca Fluviatilis)

1992 ◽  
Vol 171 (1) ◽  
pp. 163-172 ◽  
Author(s):  
HANSERIK KARLSEN
Keyword(s):  
Inner Ear ◽  
Lateral Line ◽  
Low Frequency ◽  
Perca Fluviatilis ◽  
Lateral Line System ◽  
Threshold Values ◽  
Line System ◽  
Frequency Detection ◽  
Perch Perca Fluviatilis ◽  
Cardiac Conditioning

In a previous study of infrasound detection in the cod, the inner ear was suggested to be the sensory organ responsible for the responses. However, a possible involvement of the lateral-line system in the observed low-frequency detection could not be ruled out. The infrasound sensitivity was therefore studied in perch (Perca fluviatilis) with normal and blocked lateral-line organs. The experiments were performed using a standing wave acoustic tube and the cardiac conditioning technique. All perch readily responded to infrasound frequencies down to 0.3 Hz with threshold values of approximately 2×10−4 ms−2. These thresholds were not affected by complete blocking of the lateral-line system with Co2+, which suggests that the inner ear is responsible for the observed infrasound detection by the perch.

scholarly journals Research on an Artificial Lateral Line System Based on a Bionic Hair Sensor with Resonant Readout

Micromachines ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 736 ◽  
Author(s):  
Yang ◽  
Zhang ◽  
Liang ◽  
Lu
Keyword(s):  
Flow Velocity ◽  
Lateral Line ◽  
Gas Flow ◽  
Air Flow ◽  
Low Frequency ◽  
Lateral Line System ◽  
Least Mean Square ◽  
Line System ◽  
Canal Neuromast ◽  
Air Flow Velocity

Inspired by the lateral line system of fish, an artificial lateral line system based on bionic hair sensor with resonant readout is presented in this paper. An artificial lateral line system, which possesses great application potential in the field of gas flow visualization, includes two different sensors: a superficial neuromast and a canal neuromast flow velocity sensor, which are used to measure the constant and oscillatory air flow velocity, respectively. The sensitive mechanism of two artificial lateral line sensors is analyzed, and a finite element simulation is implemented to verify the structural design. Then the control circuit of the artificial lateral line system is designed, employing a demodulation algorithm of oscillatory signal based on the least mean square error algorithm, which is used to calculate the oscillatory air flow velocity. Finally, the experiments are implemented to assess the performance of the two artificial lateral line systems. The experimental results show that the artificial lateral line system, which can be used to measure the constant and oscillatory air flow velocity, has a minimum threshold of 0.785 mm/s in the measurement of oscillatory air flow velocity. Moreover, the artificial canal neuromast lateral line system can filter out low-frequency disturbance and has good sensitivity for high-frequency flow velocity.

scholarly journals Insights into Electroreceptor Development and Evolution from Molecular Comparisons with Hair Cells

2018 ◽  
Vol 58 (2) ◽  
pp. 329-340 ◽  
Author(s):  
Clare V H Baker ◽  
Melinda S Modrell
Keyword(s):  
Gene Expression ◽  
Hair Cell ◽  
Electric Fields ◽  
Lateral Line ◽  
Hair Cells ◽  
Water Movement ◽  
Low Frequency ◽  
Lateral Line System ◽  
Line System ◽  
Ribbon Synapses

Abstract The vertebrate lateral line system comprises a mechanosensory division, with neuromasts containing hair cells that detect local water movement (“distant touch”); and an electrosensory division, with electrosensory organs that detect the weak, low-frequency electric fields surrounding other animals in water (primarily used for hunting). The entire lateral line system was lost in the amniote lineage with the transition to fully terrestrial life; the electrosensory division was lost independently in several lineages, including the ancestors of frogs and of teleost fishes. (Electroreception with different characteristics subsequently evolved independently within two teleost lineages.) Recent gene expression studies in a non-teleost actinopterygian fish suggest that electroreceptor ribbon synapses employ the same transmission mechanisms as hair cell ribbon synapses, and show that developing electrosensory organs express transcription factors essential for hair cell development, including Atoh1 and Pou4f3. Previous hypotheses for electroreceptor evolution suggest either that electroreceptors and hair cells evolved independently in the vertebrate ancestor from a common ciliated secondary cell, or that electroreceptors evolved from hair cells. The close developmental and putative physiological similarities implied by the gene expression data support the latter hypothesis, i.e., that electroreceptors evolved in the vertebrate ancestor as a “sister cell-type” to lateral line hair cells.

scholarly journals THE ELECTRICAL RESPONSE OF THE LATERAL LINE SYSTEM OF FISH TO TONE AND OTHER STIMULI

1950 ◽  
Vol 34 (1) ◽  
pp. 1-8 ◽  
Author(s):  
E. E. Suckling ◽  
J. A. Suckling
Keyword(s):  
Spontaneous Activity ◽  
Lateral Line ◽  
Fundulus Heteroclitus ◽  
Electrical Response ◽  
Lateral Line System ◽  
Intensity Level ◽  
Tone Frequency ◽  
Line System ◽  
Lateral Line Nerve

1. The lateral line of Fundulus heteroclitus and Fundulus majalis is shown to react to tone at an intensity level of 20 dynes per sq. cm. at frequencies up to 200 or 300 cycles per second. 2. Evidence is given that the nerve can reproduce the stimulating tone frequency up to at least 180 cycles per second. 3. The response of the lateral line to the swimming movements of nearby fish is demonstrated. 4. Fundulus and several other species are shown to give strong spontaneous activity of the lateral line nerve.

Frequency Response Properties of Lateral Line Superficial Neuromasts in a Vocal Fish, With Evidence for Acoustic Sensitivity

2002 ◽  
Vol 88 (3) ◽  
pp. 1252-1262 ◽  
Author(s):  
Matthew S. Weeg ◽  
Andrew H. Bass
Keyword(s):  
Frequency Response ◽  
Lateral Line ◽  
Sensory System ◽  
Spike Rate ◽  
Pass Band ◽  
Lateral Line System ◽  
Line System ◽  
Response Properties ◽  
Lateral Line Nerve ◽  
Direct Demonstration

The mechanosensory lateral line of fish is a hair cell based sensory system that detects water motion using canal and superficial neuromasts. The trunk lateral line of the plainfin midshipman fish, Porichthys notatus, only has superficial neuromasts. The posterior lateral line nerve (PLLn) therefore innervates trunk superficial neuromasts exclusively and provides the opportunity to investigate the physiological responses of these receptors without the confounding influence of canal organs. We recorded single-unit activity from PLLn primary afferents in response to a vibrating sphere stimulus calibrated to produce an equal velocity across frequencies. Threshold tuning, isovelocity, and input/output curves were constructed using spike rate and vector strength, a measure of phase locking of spike times to the stimulus waveform. All units responded maximally to frequencies of 20–50 Hz. Units were classified as low-pass, band-pass, broadly tuned, or complex based on the shapes of tuning and isovelocity curves between 20 and 100 Hz. A 100 Hz stimulus caused an increase in spike rate in almost 50%, and significant synchronization in >80%, of all units. Midshipman vocalizations contain significant energy at and below 100 Hz, so these results demonstrate that the midshipman peripheral lateral line system can encode these acoustic signals. These results provide the first direct demonstration that units innervating superficial neuromasts in a teleost fish have heterogeneous frequency response properties, including an upper range of sensitivity that overlaps spectral peaks of behaviorally relevant acoustic stimuli.

scholarly journals Initiation of locomotion by lateral line photoreceptors in lamprey: behavioural and neurophysiological studies

1995 ◽  
Vol 198 (12) ◽  
pp. 2581-2591 ◽  
Author(s):  
T G Deliagina ◽  
F Ullén ◽  
M-J. Gonzalez ◽  
H Ehrsson ◽  
G N Orlovsky ◽  
...  
Keyword(s):  
Lateral Line ◽  
The Body ◽  
Lateral Line System ◽  
Tail Region ◽  
Directional Bias ◽  
Line System ◽  
Lateral Line Nerve ◽  
Neurophysiological Studies ◽  
Behavioural Experiments ◽  
The Right

The lateral line system of lampreys includes photoreceptors distributed in the skin of the tail region. These are innervated by the trunk lateral line nerves, and the afferents terminate bilaterally in the medial octavolateral nucleus, crossing the midline through the cerebellar commissure. Stimulation of the dermal photoreceptors by tail illumination initiates locomotion. The present study was performed to characterize the response to illumination in larval and adult lampreys in detail and to elucidate the neuronal pathways responsible for the activation of locomotion. In both larval and adult quiescent lampreys, the response to unilateral illumination of the tail was found to consist of an initial turn followed by rectilinear swimming. The sign and magnitude of the turning angle were not correlated with the laterality of the optic stimulus. In mechanically restrained lampreys, spinalized at the level of segments 15­20, tail illumination evoked a complex motor response in the rostral part of the body, with switches between different patterns of coordination (turns in different directions, locomotion, and turns combined with locomotion). Thus, the response to tail illumination is not a simple reflex, but includes a behavioural choice. Reticulospinal neurones play a crucial role in the initiation of locomotion in lampreys. The response to unilateral tail illumination in rhombencephalic reticular cells was studied with extracellular single-unit recordings. It was found that neurones in the middle and posterior rhombencephalic reticular nuclei were activated bilaterally. Tonic activity or slow bursts (<0.5 Hz) were evoked, in some cases lasting up to 60 s after the stimulation. The response remained bilateral after transection of one lateral line nerve and the cerebellar commissure. Afferents from one side can thus activate reticulospinal cells on both sides through a pathway outside the cerebellar commissure. This bilateral activation of reticulospinal neurones is presumably responsible for the activation of spinal locomotor networks, without any directional bias to the left or the right side, and for the rectilinear swimming observed in behavioural experiments. In the caudal part of the termination area of the lateral line nerve afferents, neurones with contralateral projections were retrogradely stained with horseradish peroxidase. These neurones appear to be likely candidates for mediating the contralateral effects of the lateral line fibres.

scholarly journals ELECTRICAL RESPONSES FROM THE LATERAL-LINE NERVES OF FISHES

1934 ◽  
Vol 18 (1) ◽  
pp. 89-91 ◽  
Author(s):  
Hudson Hoagland
Keyword(s):  
Lateral Line ◽  
Spontaneous Discharge ◽  
Lateral Line System ◽  
Tonic Activity ◽  
Inhibitory Effects ◽  
Line System ◽  
Lateral Line Nerve ◽  
Auditory Responses ◽  
The Central Nervous System

Records of spontaneous discharge of nerve impulses, similar to that previously described in catfish and in trout, have been obtained from lateral-line nerves of goldfish and perch, by the use of concentric micro electrodes slipped under the nerve in situ. These impulses have been followed into the central nervous system. They enter the tuberculum acusticum and thence apparently spread diffusely through the cerebellum. Cutting the lateral-line nerve on one side silences the ipsilateral tuberculum acusticum, but only reduces the intensity of ipsilateral cerebellar activity. Cutting the remaining lateral-line nerve silences activity throughout the tuberculum acusticum and the cerebellum. The maintenance of tonic activity in the tuberculum acusticum by way of lateral-line discharge may account for the inhibitory effects of the lateral-line system on auditory responses.

scholarly journals QUANTITATIVE ANALYSIS OF RESPONSES FROM LATERAL-LINE NERVES OF FISHES. II

1933 ◽  
Vol 16 (4) ◽  
pp. 715-732 ◽  
Author(s):  
Hudson Hoagland
Keyword(s):  
Quantitative Analysis ◽  
Spontaneous Activity ◽  
Lateral Line ◽  
Nerve Impulse ◽  
Temperature Characteristic ◽  
Spontaneous Discharge ◽  
Lateral Line System ◽  
Sense Organs ◽  
Line System ◽  
Lateral Line Nerve

1. The lateral-line nerves of trout as well as those of catfish are found to discharge impulses spontaneously at a high frequency. 2. The frequency of nerve impulse discharge is measured as a function of the number of participating receptor groups (lateral-line sense organs). A quantitative analysis is made of the contribution to the total response made by each group of sense organs. 3. An analysis of the variability of the response is presented which makes it possible to estimate quantitatively the longitudinal extent of damage to the neuromasts due to surgical manipulation. 4. A method is described for recording the response of a single nerve fiber in the lateral-line trunk. 5. The frequency of the spontaneous discharge from the lateral-line nerve trunk when plotted as a function of temperature according to the Arrhenius equation yields a temperature characteristic of approximately 5000 calories. 6. The variability of the frequency of response as a function of temperature indicates the existence of temperature thresholds for the spontaneous activity of the neuromasts. 7. A possible basis for the spontaneous activity is considered. It is pointed out that the lateral-line system may serve as a model of the Purkinje cells of the cerebellum.

Peripheral encoding of moving sources by the lateral line system of a sit-and-wait predator

1998 ◽  
Vol 201 (1) ◽  
pp. 91-102 ◽  
Author(s):  
J C Montgomery ◽  
S Coombs
Keyword(s):  
Pressure Gradient ◽  
Lateral Line ◽  
Prey Capture ◽  
Neural Response ◽  
Electrophysiological Recording ◽  
Video Tape ◽  
Lateral Line System ◽  
Response Patterns ◽  
Line System ◽  
Lateral Line Nerve

Video-tape recordings of prey-capture behaviour were made to demonstrate that stargazers can detect and capture prey in the dark and to determine the range of prey movement velocities that resulted in prey capture. Electrophysiological recording techniques were then used to determine how an artificial source (a sphere), moving at speeds within the range of recorded prey movement velocities, was encoded by anterior lateral line nerve fibres innervating the preopercular-mandibular canals on the head. A vibrating sphere was also used to measure frequency-response characteristics to determine the bandwidth of response and fibre origin (type of neuromast and location). In order to measure the relevant stimulus parameters likely to govern neural responses, the pressure-gradient pattern produced by the moving sphere was characterised with a pair of miniature hydrophones separated by approximately the same distance as head lateral line canal pores on stargazers. At least four different features of neural response patterns, including direction-dependent changes in the overall envelope of the firing rate pattern, could be predicted on the basis of measured pressure-gradient patterns. The dominant features of both the pressure-gradient and neural response patterns were produced by the wake behind the moving sphere, but behavioural observations indicated that stargazers were responding to the bow of an approaching prey, rather than its wake. Although the form of the wake behind the moving sphere is unlikely to be a good match for the stimulus mediating prey detection, these results clearly establish that pressure-gradient patterns are good predictors of neural response patterns. Thus, similar measurements of pressure-gradient patterns produced by more biologically relevant sources can be used to predict peripheral lateral line responses and stimulus features likely to be of key importance.

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