Directional Sensitivity of Single Ommatidia in the Compound Eye of Limulus.
نویسنده
چکیده
6 T. Takagi, "Ueber das ReciprocitAtsgesetz in einem beliebigen algebraischen Zahlkorper," J. Coll. Science, Tokyo Imp. Univ., 44, 26 (1922), Satz 11. I For 1 = 3, this is exemplified by the cases p = 109 and 127. For l = 5 an example is p = 61051. We have not determined the smallest prime of the latter type. 8 E. Landau, "Ueber die Verteilung der Primideale in den Idealklassen eines algebraischen Zahlk6rpers," Math. Ann., 63, 196-197 (1907); T. Takagi, "Ueber eine Theorie des relativ Abel'schen Zahlkbrpers," J. Coll. Science, Tokyo Imp. Univ., 41, 19 (1920); H. Hasse, "Bericht ueber neuere Untersuchungen und Probleme aus der Theorie der algebraischen Zahlkorper," Zahresbe? icht Deutsch. Math.-Vereinigung, 35, 1-55 (1926).
منابع مشابه
Polarized Light and Angle of Stimulus Incidence in the Compound Eye of Limulus.
Evidence has been accumulating that the polarized-light sensitivities of various single ommatidia in the Limulus eye were different and that even the same ommatidium might show altered responses under changed conditions. Since the orientation of the optic axes of these units varies widely from one place to another in the eye, the most likely parameter concerned here seemed to be the incident an...
متن کاملInhibition in the Limulus lateral eye in situ
Inhibition in the Limulus lateral eye in situ is qualitatively similar to that in the excised eye. In both preparations ommatidia mutually inhibit one another, and the magnitude of the inhibitory effects are linear functions of the response rate of individual ommatidia. The strength of inhibition exerted between single ommatidia is also about the same for both preparations; however, stronger ef...
متن کاملEfferent control of temporal response properties of the Limulus lateral eye
The sensitivity of the Limulus lateral eye exhibits a pronounced circadian rhythm. At night a circadian oscillator in the brain activates efferent fibers in the optic nerve, inducing multiple changes in the physiological and anatomical characteristics of retinal cells. These changes increase the sensitivity of the retina by about five orders of magnitude. We investigated whether this increase i...
متن کاملMorphology of the Ommatidia of the Compound Eye of Limulus
The sensory portion of the ommatidium of the compound eye of Limulus has been studied with the electron microscope. In axial longitudinal section the rhabdom appears to be made up of small polygons, and in transverse section the rhabdom appears as a banded structure of dark lines. Thus in three dimensions the rhabdom resembles a honeycomb composed of tubular units, the long axes of which lie in...
متن کاملInhibition in the Eye of Limulus
In the compound lateral eye of Limulus each ommatidium functions as a single receptor unit in the discharge of impulses in the optic nerve. Impulses originate in the eccentric cell of each ommatidium and are conducted in its axon, which runs without interruption through an extensive plexus of nerve fibers to become a fiber of the optic nerve. The plexus makes interconnections among the ommatidi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Proceedings of the National Academy of Sciences of the United States of America
دوره 40 4 شماره
صفحات -
تاریخ انتشار 1954