scholarly journals THE CARBON DIOXIDE EXCRETED IN ONE MINUTE BY ONE CENTIMETER OF NERVE-FIBER

1925 ◽  
Vol 9 (2) ◽  
pp. 191-195 ◽  
Author(s):  
G. H. Parker
Keyword(s):  
Carbon Dioxide ◽  
Nerve Fiber ◽  
Lateral Line ◽  
Lateral Line Nerve

One centimeter of nerve-fiber from the lateral-line nerve of the dogfish is estimated to excrete on the average 4.2 x 10–8 mg. CO2 per minute.

scholarly journals CARBON DIOXIDE FROM THE NERVE CORD OF THE LOBSTER

1925 ◽  
Vol 7 (6) ◽  
pp. 671-677 ◽  
Author(s):  
G. H. Parker
Keyword(s):  
Carbon Dioxide ◽  
Lateral Line ◽  
Nerve Cord ◽  
Homarus Americanus ◽  
Lateral Line Nerve ◽  
Steady Decrease ◽  
Co2 Output ◽  
Living Preparation

1. The nerve cord of the lobster (Homarus americanus Milne-Edwards) is very delicate and can be used as a living preparation for only a few hours after its removal from the animal. 2. During the first hour or so after removal it discharges CO2 at a steadily decreasing rate beginning at about 0.20 mg. CO2 per gram of cord per minute and ending at about 0.07 mg. 3. This discharge exhibits a steady decrease in rate and is not divisible into a period of gush and a period of uniform outflow as with the lateral-line nerve of the dogfish. It terminates in a very few hours with the complete death of the cord. 4. Both handling and cutting the cord temporarily increase the rate of CO2 output. 5. The stimulated cord discharges CO2 at a rate about 26 per cent higher than that of the quiescent cord, an increase of about 1.6 times that of the increase observed in the lateral-line nerve of the dogfish under similar circumstances.

scholarly journals ACTION CURRENT OF THE SINGLE LATERAL-LINE NERVE FIBER OF FISH

1950 ◽  
Vol 1 ◽  
pp. 179-194 ◽  
Author(s):  
YASUJI KATSUKI ◽  
SHIZUO YOSHINO ◽  
JUNG CHEN
Keyword(s):  
Nerve Fiber ◽  
Lateral Line ◽  
Action Current ◽  
Lateral Line Nerve

Regeneration of the lateral line nerve of Amblystoma from different nerve fiber sources

1943 ◽  
Vol 87 (2) ◽  
pp. 119-125 ◽  
Author(s):  
Paul Weiss ◽  
Jean B. Cummings
Keyword(s):  
Nerve Fiber ◽  
Lateral Line ◽  
Lateral Line Nerve

scholarly journals ACTION CURRENTS OF THE SINGLE LATERAL-LINE NERVE FIBER OF FISH

1950 ◽  
Vol 1 ◽  
pp. 87-99 ◽  
Author(s):  
YASUJI KATSUKI ◽  
SHIZUO YOSHINO ◽  
JUNG CHEN
Keyword(s):  
Nerve Fiber ◽  
Lateral Line ◽  
Lateral Line Nerve

scholarly journals THE PRODUCTION OF CARBON DIOXIDE BY NERVE

1925 ◽  
Vol 7 (5) ◽  
pp. 641-669 ◽  
Author(s):  
G. H. Parker
Keyword(s):  
Carbon Dioxide ◽  
Lateral Line ◽  
Chemical Change ◽  
Co2 Production ◽  
Lateral Line Nerve ◽  
Respiratory Apparatus

1. A modified Osterhout respiratory apparatus for the detection of CO2 from nerve is described. 2. The lateral-line nerve from the dogfish discharges CO2 at first with a gush for half an hour or so and then steadily at a lower rate for several hours. 3. Simple handling of the nerve does not increase the output of CO2; cutting it revives gush. 4. The CO2 produced by nerve is not escaping simply from a reservoir but is a true nervous metabolite. 5. The rate of discharge of CO2 from a quiescent nerve varied from 0.0071 to 0.0128 mg. per gram of nerve per minute and averaged 0.0095 mg. 6. Stimulated nerve showed an increased rate of CO2 production of 15.8 percent over that of quiescent nerve. 7. The results of these studies indicate that chemical change is a factor in nerve transmission.

scholarly journals RAPID DEGENERATION OF AMPULLARY ELECTRORECEPTOR ORGANS AFTER DENERVATION

1973 ◽  
Vol 56 (2) ◽  
pp. 466-477 ◽  
Author(s):  
R. Bruce Szamier ◽  
Michael V. L. Bennett
Keyword(s):  
Nerve Fiber ◽  
Lateral Line ◽  
Receptor Cell ◽  
Secretory Cells ◽  
Supporting Cells ◽  
Nerve Section ◽  
Structural Alterations ◽  
Lateral Line Nerve ◽  
Receptor Cells ◽  
Afferent Innervation

Electroreceptors (ampullary organs) of the transparent catfish (Kryptopterus bicirrhus) lie in the epidermis, and contain spherical receptor cells that receive purely afferent innervation from the lateral line nerve. Section of this nerve causes rapid degenerative changes to occur in the receptors. Fine structural alterations occur in the receptor cell synapses and nerve fiber 6–12 h postoperatively. Disruption of the receptor cells begins by 18 h and most are lost by 48 h. By 72 h supporting cells and secretory cells also show marked degeneration, and by 96 h they may be totally lost. The rapid degeneration of the electroreceptor organs of Kryptopterus should make them a useful preparation for analysis of neurotrophic functions.

The central connections of the anterior lateral line nerve ofGnathonemus petersii

1973 ◽  
Vol 151 (1) ◽  
pp. 67-84 ◽  
Author(s):  
L. Maler ◽  
H. J. Karten ◽  
M. V. L. Bennett
Keyword(s):  
Lateral Line ◽  
Lateral Line Nerve

Behavioral and Neurophysiological Demonstration of a Lateralis Skin Photosensitivity in Larval Sea Lampreys

1991 ◽  
Vol 161 (1) ◽  
pp. 97-117 ◽  
Author(s):  
MARK RONAN ◽  
DAVID BODZNICK
Keyword(s):  
Spontaneous Activity ◽  
Lateral Line ◽  
Lateral Line Nerve ◽  
Medial Nucleus ◽  
Posterior Lateral Line ◽  
Behavioral Studies ◽  
Sea Lampreys ◽  
Response Thresholds ◽  
The Brain ◽  
Skin Photosensitivity

Larval lampreys respond to skin illumination with a delayed burst of swimming in an attempt to escape the light. The photoresponse, which is independent of the lateral eyes and pineal organs, is most readily elicited by light shone on the tail. Behavioral studies in larval lampreys demonstrate that photosensory afferents innervating the tail are carried by a trunk lateral line nerve supplying regions caudal to the head. The present results confirm that bilateral transection of this nerve in larval sea lampreys markedly diminishes the photoresponse. The trunk lateral line nerve consists of the recurrent ramus of the anterior lateral line nerve and a ramus of the posterior lateral line nerve. Bilateral transection of the recurrent ramus does not affect the photoresponse, indicating that lateralis photosensory afferents enter the brain via the posterior lateral line nerve and terminate in the medial octavolateralis nucleus. Photosensory units were subsequently recorded in the trunk lateral line nerve, posterior lateral line nerve and the lateral line area of the medulla. Medullary photosensory units were localized to the medial nucleus, previously regarded as the primary mechanosensory nucleus. Photosensory units in lateral line nerves and the brain exhibited low, irregular spontaneous activity and, after latencies of 17–4 s, responded to tail illumination with repeated impulse bursts. Response thresholds were 0.1-0.9 mWcm−2. Responses to sustained illumination were slowly adapting. A skin photosense is thus an additional lateralis modality in lampreys.

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