+ Translate

Receptive field characteristics of a directionally selective movement detector in the visual system of the blow fly

, : Receptive field characteristics of a directionally selective movement detector in the visual system of the blow fly. Journal of Comparative Physiology A Sensory Neural and Behavioral Physiology 116(1): 39-50

Action potentials evoked by stepwise-moving visual stimuli were recorded extracellularly from the horizontally selective movement detectors in the lobula complex of the blowfly Calliphora erythrocephala (M.). The relation between the ommatidial mosaic structure of the compound eye and the behavior of the detector was studied. Maximum reactions were obtained for stimuli which moved with a step-width equal to .DELTA.phi.]h, where .DELTA.phi.h is the effective interommatidial angle. When using stepwise moving single contrast borders the reaction to a moving dark over bright contrast border was always greater than or equal to the reaction evoked by a moving bright over dark contrast border. Experiments with spatially small stimuli in which only a few rows of adjoining ommatidia were stimulated showed that the sensitivity distribution of the detector was spatially modulated with a period which equals the interommatidial angle .DELTA.phi. If the spatial wavelength .lambda.s of a square wave grating was adjusted in such a way that .DELTA.phi.h < .lambda.s < 2.DELTA.phi.h, the reaction of the detector was reversed: movement in the preferred direction results in inhibition and movement in the null direction results in excitation.

(PDF 0-2 workdays service)

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 006269910

PDF Full Text: Submit

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Swiderek, E.; Strządała, L., 2014: Autophagy and BNIP3 protein in tumorogenesis. Autophagy is a process necessary for maintaining cell homeostasis in physiological conditions, as well as during certain stresses like nutrients or oxygen deprivation. Autophagy also plays an essential role in tumorigenesis. It prevents cell trans...

Dzharbusynov, B.U.; Shalekenov, B.U.; Merkusheva, N.V., 1991: State of the Krebs cycle in the kidneys of rats with chronic phosphorus intoxication. Biulleten' Eksperimental'noi Biologii i Meditsiny 112(8): 161-162

Sychev, O. S., 1998: Time-related course of functional indices for the cardiovascular system in patients with a history of advancing stenocardia. The objective of this study was an assessment of time-related course of functional indices for the cardiovascular system in patients with prior advancing angina pectoris (AAP). A close inverse relation was found out between the time-related course...

Molinero, C.; Mata, S.; Calero, M.Dolores.; García-Martín, M.Belén.; Araque-Cuenca, A., 2016: Usefulness of WISC-IV in Determining Intellectual Giftedness. Several studies question the usefulness of the Wechsler Intelligence Scale for Children (WISC-IV) in determining giftedness due to the importance of speed in some of its subtests, which may penalize children of high intellectual level. This study...

Abernathy J.R.; Wax L.M.; Slife F.W., 1970: Weed control in soybeans with directed applications following conventional herbicide usage. In a study in soyabeans cv. Amsoy sown on silty clay loam of 5% o.m. and receiving conventional herbicide treatment, the following additional herbicides applied as directed sprays enhanced control of Setaria faberii and several broad-leaved specie...

Ukrainetz, N.K.; Kang, K.-Young; Aitken, S.N.; Stoehr, M.; Mansfield, S.D., 2008: Heritability and phenotypic and genetic correlations of coastal Douglas-fir (Pseudotsuga menziesii) wood quality traits. Genetic control and relationships among coastal Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) growth and Wood quality traits were assessed by estimating heritability and phenotypic and genetic correlations using 600 trees repr...

Kuhn, F.E.; Rackley, C.E., 1993: Coronary artery disease in women. Risk factors, evaluation, treatment, and prevention. Cardiovascular disease is the leading cause of death in women. Unfortunately, the problem of cardiovascular disease in women has been largely ignored as women have been enrolled in limited numbers or excluded entirely from many of the major trials...

Poggenpoel, M., 1996: Psychiatric nursing research based on nursing for the whole person theory. One of the determinants for decision-making in conducting psychiatric nursing research is the researchers' framework of reference he/she works from. This framework of reference refers to the way in which researcher views reality and is called...

Frenzel, J., 1892: Untersuchungen uber die mikroskopische Fauna Argentiniens. I. Theil: Die Protozoen. I. & II. Abtheilung : Die Rhizopoden und Helioamoeben. FRENZEL (47-52) gives elaborate papers on Argentine Protozoa, especially on Rhizopoda, Helioamoeboe, and Sporozoa.

Irvine, W.D.; Flynn, H.W.; Miller, D.; Pflugfelder, S.C., 1992: Endophthalmitis caused by gram-negative organisms. The medical records of 52 patients (53 eyes) with culture-proven gram-negative endophthalmitis between January 1982 and December 1990 were reviewed. Pseudomonas aeruginosa (23% (12/53)) and Haemophilus influenzae (19% (10/53)) were the most freque...