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  • Associative learning  (1)
  • Electronmicroscopy  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 40 (1977), S. 11-19 
    ISSN: 1432-0533
    Keywords: McArdle's syndrome ; Histochemistry ; Electronmicroscopy ; Muscle pathology ; Muscle phosphorylase activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two cases of McArdle's syndrome are reported. One is a “classical” exaple; the other is unusual because of the in vitro presence of muscle phosphorylase activity. In the latter case. the electronmicroscopic investigation confirmed the diagnosis. The fine structural changes characteristic of this disease are summarized and it is concluded that histochemical studies alone are insufficient to exclude the diagnosis of McArdle's myopathy.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-9456
    Keywords: Key words Proboscis extension reflex ; Associative learning ; Social insects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We studied the association between honey bee (Apis mellifera) division of labor and performance on an olfactory reversal-learning test. Manipulations of colony age structure and flight experience were used to test whether differences in performance are associated with age, current behavioral state, or flight experience. Nurse bees showed significantly faster rates of extinction to a learned odor than did foragers. This difference was associated primarily with differences in behavioral state, rather than age; it was seen when comparing nurses and foragers from typical colonies and normal-age nurses and precocious foragers from single-cohort colonies. Differences in extinction rate were not related to differences in flight experience; there was no difference between foragers and foraging-age bees denied flight experience. These results suggest that changes in learning and memory occur in association with division of labor. We speculate on the possible functional significance of the difference in extinction rate between nurses and foragers.
    Type of Medium: Electronic Resource
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