. The biology of marine animals. Marine animals; Physiology, Comparative. Fig. Records of Discharge of the Electric Organ of Torpedo torpedo Upper record, natural discharge; five following traces, discharge provoked by stimula- tion of the electric lobes with alternating current, at frequencies of 1,000, 500, 200, 150 and 100 c/s. (From Albe-Fessard (5).) of Torpedo are not and can be excited only through the nerve. In the latter animal nerve section and degeneration render the organ inexcitable. Each time the electric lobe of the medulla or the nerve is stimulated a single discharge is
. The biology of marine animals. Marine animals; Physiology, Comparative. Fig. Records of Discharge of the Electric Organ of Torpedo torpedo Upper record, natural discharge; five following traces, discharge provoked by stimula- tion of the electric lobes with alternating current, at frequencies of 1,000, 500, 200, 150 and 100 c/s. (From Albe-Fessard (5).) of Torpedo are not and can be excited only through the nerve. In the latter animal nerve section and degeneration render the organ inexcitable. Each time the electric lobe of the medulla or the nerve is stimulated a single discharge is produced in the electric organ. Reflex stimulation produces a volley of impulses in the nerve to the electric organ, accompanied by a corresponding series of electric discharges (Fig. ). Functional analysis of the reflex pathway has revealed a relay centre (oval nucleus) in the medulla, where ascending fibres from the cord terminate. From this bulbar nucleus impulses are relayed to motor neurones of the electric organ in the electric lobe. All parts of both organs discharge almost synchronously, within a period of 1 msec, thereby providing maximal power output. It appears that this synchrony is due to different latencies. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nicol, J. A. Colin (Joseph Arthur Colin), 1915-. New York, Interscience Publishers
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Keywords: ., bookcentury1900, booksubjectmarineanimals, booksubjectphysiology
