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Titolo:
THE RESPONSES OF MIDBRAIN LATERAL-LINE UNITS OF THE GOLDFISH, CARASSIUS-AURATUS, TO OBJECTS MOVING IN THE WATER
Autore:
WOJTENEK W; MOGDANS J; BLECKMANN H;
Indirizzi:
UNIV BONN,INST ZOOL,POPPELSDORFER SCHLOSS D-53115 BONN GERMANY UNIV BONN,INST ZOOL D-53115 BONN GERMANY
Titolo Testata:
Zoology
fascicolo: 2, volume: 101, anno: 1998,
pagine: 69 - 82
SICI:
0944-2006(1998)101:2<69:TROMLU>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
SAROTHERODON-NILOTICUS L; MOTTLED SCULPIN; EXCITATION PATTERNS; ELECTRIC FISH; COTTUS-BAIRDI; RAINBOW-TROUT; MORPHOLOGY; SYSTEM; SENSITIVITY; INNERVATION;
Keywords:
MECHANORECEPTION; HYDRODYNAMICS; NEUROMAST; CYPRINIDAE; TORUS SEMICIRCULARIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
46
Recensione:
Indirizzi per estratti:
Citazione:
W. Wojtenek et al., "THE RESPONSES OF MIDBRAIN LATERAL-LINE UNITS OF THE GOLDFISH, CARASSIUS-AURATUS, TO OBJECTS MOVING IN THE WATER", Zoology, 101(2), 1998, pp. 69-82

Abstract

Lateral line responses to hydrodynamic stimuli caused by small objects moving in the water were recorded extracellularly from single and ''few units'' in the midbrain torus semicircularis of the goldfish, Carassius auratus. All units (n = 59) increased their discharge rate when an object passed the fish laterally either from anterior to posterior or in the opposite direction. Different units could show different temporal response patterns. In 29 out of 49 units tested (59%) the numberof spikes caused by an object moving from anterior to posterior alongthe side of the fish was significantly different from those caused byan object moving from posterior to anterior. Two units encoded motiondirection by different temporal patterns of discharge. In general, discharge rates decreased when object distance was increased or when object speed was decreased. Changes in object size and shape did not affect the strength of unit responses as much as changes in object speed and distance. The data indicate that some midbrain lateral line units in the goldfish encode motion direction but are not tuned to other aspects of an object moving in the water. In this respect, the responses of units in the midbrain are similar to those reported for medullary units of goldfish. However, comparing midbrain with peripheral and medullary responses, it becomes clear that a substantial amount of neural computation has taken place and that there are distinct response types in the midbrain of Carassius which differ from the uniform peripheral and from medullary response patterns.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/10/20 alle ore 03:44:19