منابع مشابه
Buccal neurons activate ciliary beating in the foregut of the pteropod mollusk Clione limacina.
Beating of cilia lining the foregut of gastropods facilitates the swallowing of food and, therefore, plays a role in feeding behavior. Despite the fact that neural control of feeding is well studied in mollusks, no neurons controlling ciliary beating in the foregut have been identified to date. Here we describe for the first time a pair of buccal neurons innervating the foregut of Clione. Intra...
متن کاملStartle phase of escape swimming is controlled by pedal motoneurons in the pteropod mollusk Clione limacina.
Escape swimming in the pteropod mollusk Clione limacina includes an initial startle response in which one or two powerful wing beats propel the animal up to 18 body lengths per second, followed by a variable period of fast swimming with a maximal speed of 6 body lengths per second. The initial startle response is the focus of this report. Two pairs of large pedal neurons (50-60 microns) initiat...
متن کاملCellular Mechanisms Underlying Swim Acceleration in the Pteropod Mollusk Clione limacina.
The pteropod mollusk Clione limacina swims by dorsal-ventral flapping movements of its wing-like parapodia. Two basic swim speeds are observed-slow and fast. Serotonin enhances swimming speed by increasing the frequency of wing movements. It does this by modulating intrinsic properties of swim interneurons comprising the swim central pattern generator (CPG). Here we examine some of the ionic cu...
متن کاملChanges in wingstroke kinematics associated with a change in swimming speed in a pteropod mollusk, Clione limacina.
In pteropod mollusks, the gastropod foot has evolved into two broad, wing-like structures that are rhythmically waved through the water for propulsion. The flexibility of the wings lends a tremendous range of motion, an advantage that could be exploited when changing locomotory speed. Here, we investigated the kinematic changes that take place during an increase in swimming speed in the pteropo...
متن کاملCholinergic activation of startle motoneurons by a pair of cerebral interneurons in the pteropod mollusk Clione limacina.
The holoplanktonic pteropod mollusk Clione limacina exhibits an active escape behavior that is characterized by fast swimming away from the source of potentially harmful stimuli. The initial phase of escape behavior is a startle response that is controlled by pedal motoneurons whose activity is independent of the normal swim pattern generator. In this study, a pair of cerebral interneurons is d...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1992
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1542175