Swim bladder and posterior lateral line nerve of the nurseryfish,Kurtus gulliveri(Perciformes: Kurtidae)

2004 ◽  
Vol 260 (2) ◽  
pp. 193-200 ◽  
Author(s):  
Kent E. Carpenter ◽  
Tim M. Berra ◽  
Julian M. Humphries
Keyword(s):  
Lateral Line ◽  
Swim Bladder ◽  
Lateral Line Nerve ◽  
Posterior Lateral Line

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.

Studies on a primitive cerebellar cortex - II. The projection of the posterior lateral-line nerve to the lateral-line lobes of the dogfish brain

1977 ◽  
Vol 195 (1121) ◽  
pp. 467-478 ◽  
Keyword(s):  
Electrical Stimulation ◽  
Lateral Line ◽  
Molecular Layer ◽  
Field Potentials ◽  
Active Response ◽  
Lateral Line Nerve ◽  
Posterior Lateral Line ◽  
Lateral Posterior ◽  
Latency Variation ◽  
Stimulation Of

Field potentials and unit responses generated by electrical stimulation of the posterior lateral-line nerve were recorded from the dogfish hindbrain. The field potentials were largest on the surface of the ipsi-lateral posterior lateral-line lobe and were smaller on or absent from adjacent regions. They were positive in the molecular layer but reversed to become negative in the lobe neuropil where unit responses from afferent fibres and secondary neurons were recorded. A large negative deflexion, which superimposed on the positive field and whose latency decreased linearly with depth was sometimes recorded in the molecular layer; this potential was interpreted as being an active response of the molecular-layer dendrites of the secondary neurons conducting at about 0.3 m s -1 . The secondary neurons were monosynaptically excited by the lateral-line input and discharged up to three spikes for a single stimu­lus: they showed considerable latency variation and were unable to follow stimulation above 100 Hz.

scholarly journals Activity-independent specification of synaptic targets in the posterior lateral line of the larval zebrafish

2009 ◽  
Vol 106 (51) ◽  
pp. 21948-21953 ◽  
Author(s):  
A. Nagiel ◽  
S. H. Patel ◽  
D. Andor-Ardo ◽  
A. J. Hudspeth
Keyword(s):  
Lateral Line ◽  
Larval Zebrafish ◽  
Posterior Lateral Line
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