Chromatic properties of interneurons in the optic lobes of the bee

Kien, Jenny; Menzel, Randolf

doi:10.1007/bf00610452

Cited by 127 publications

(59 citation statements)

References 25 publications

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“…Since both inputs were excitatory, the neuron was considered typically broadband. These results were similar to findings in the butterfly (Swihart 1970) and in the honeybee (Kien and Menzel 1977a;Hertel 1980). However, these response properties changed when the stimulus duration was increased from 500 ms to as long as 3 min.…”

Section: Broadband Neuronssupporting

confidence: 79%

“…These neurons did not function simply as part of an intensity coding subsystem. These properties were similar to those of broadband neurons in the bee described by Kien and Menzel (1977a). The cockroach's broadband responses were probably used to relay intensity information since they generally reflected relative levels of stimulation intensity.…”

Section: Broadband Neuronssupporting

confidence: 56%

“…In the butterfly (Swihart 1970;Horridge et al 1984) and the bee (Kien and Menzel 1977b;Hertel 1980), spectral sensitivity curves of these neurons were often similar to but distinct from that of a single receptor due to the effects of other inputs. These results have been interpreted to mean that significant inhibitory interactions took place above the level of the recorded neuron in spectral regions where receptor sensitivities overlapped.…”

Section: Broadband Neuronsmentioning

confidence: 99%

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Electrophysiology and anatomy of medulla interneurons in the optic lobe of the cockroach, Periplaneta americana

Kelly

Mote

1990

J Comp Physiol A

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1. Medulla interneurons of the optic lobe of P. americana were studied to determine their spectral properties. These neurons exhibited tonic firing which changed with monochromatic broadfield illumination of the ipsilateral eye. The response patterns of these neurons were analyzed by inferring their relation to the ultraviolet (UV) and green (G) photoreceptor groups of the eye. Their anatomy was described after injection of Lucifer yellow. 2. Broadband neurons received either excitatory or inhibitory input from both UV and G receptors. These neurons were not strictly sensitive to luminosity levels and had large cell bodies in the central rind of the medulla and wide dendritic arbors in the medulla neuropil. 3. Narrow band neurons received input from predominantly one receptor type. Their spectral sensitivity curves were more finely tuned than those of the primary receptors presumably due to neural interactions within the optic lobe. 4. Color opponent neurons were inhibited by UV and excited by G inputs in their sustained response. Under certain conditions, some of these neurons also showed G inhibition. These neurons suggested the presence of a subsystem involved in color vision. 5. Broadband, narrow band and color opponent properties were seen in some single neurons when tested over a 5-6 log unit range of intensity. The responses of some of these neurons changed when stimulus duration was increased. These findings indicated that functional classification for these neurons was dependent on stimulus intensity and duration. 6. Polarizational sensitivity was tested in preliminary experiments. Two neurons responded to the movement and direction of polarized light.

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Section: Broadband Neuronssupporting

confidence: 79%

Section: Broadband Neuronssupporting

confidence: 56%

Section: Broadband Neuronsmentioning

confidence: 99%

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Electrophysiology and anatomy of medulla interneurons in the optic lobe of the cockroach, Periplaneta americana

Kelly

Mote

1990

J Comp Physiol A

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“…A more likely strategy, therefore, is that the bees used a hierarchical approach of encoding low spatial frequency contrast information across the f loral matrix (as this information was highly correlated with the boundaries between lights), which was then used to constrain their processing of higher spatial frequency relational information from the individual f lowers within each spatially demarcated region. Menzel and Kien (16) found single cells in honeybee brain with some of the necessary opponent characteristics that are consistent with this hypothesis.…”

Section: Discussionsupporting

confidence: 62%

Bees encode behaviorally significant spectral relationships in complex scenes to resolve stimulus ambiguity

Lotto

Wicklein

2005

Proc. Natl. Acad. Sci. U.S.A.

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Bees, like humans, can continue to see a surface from its color even when the scene's global illuminant changes (which is a phenomenon called color constancy). It is not known, however, whether they can also generate color-constant behavior in more natural complex scenes that are lit by multiple lights simultaneously, conditions in which most computational models of color constancy fail. To test whether they can indeed solve this more complex problem, bumblebees were raised in a highly controlled, yet ecological relevant environment consisting of a matrix of 64 artificial flowers under four spatially distinct lights. As in nature, the bees had no direct access to spectral information about the illuminants or flowers. Furthermore, the background of all of the flowers in the matrix was black, independent of illumination. The stimulus information presented to the bee was, therefore, far more constrained than that normally experienced in nature. And yet, bees learned to identify the rewarded flowers in each differently illuminated region of the matrix, even when the illumination of one of the regions was switched with one the bees had not previously experienced. These results suggest that bees can generate color-constant behavior by encoding empirically significant contrast relationships between statistically dependent, but visually distinct, stimulus elements of scenes.color ͉ vision ͉ color constancy ͉ context learning ͉ insect vision

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“…However, recent attempts to find universal laws that might govern perception suggest that there may be common underlying principles to these mechanisms of time perception [77]. However, currently there is a paucity of data on how neurons in the bee brain process temporal information, although complex responses to temporal variations in stimulus (such as stimulus entrainment, temporal summation and habituation in the inner lobula, and central brain structures) have been reported [27][28][29][31][32][33][34][35]37]. One plausible mechanism for processing of timing information in the brain would be an oscillating circuit to which neurons could synchronize their responses as described for olfactory neurons in the locust MBs [43,78], and oscillations have been reported in honeybee brains [79,80].…”

Section: Speed-accuracy Tradeoffs and Colour Discriminationmentioning

confidence: 99%

Colour processing in complex environments: insights from the visual system of bees

2010

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Colour vision enables animals to detect and discriminate differences in chromatic cues independent of brightness. How the bee visual system manages this task is of interest for understanding information processing in miniaturized systems, as well as the relationship between bee pollinators and flowering plants. Bees can quickly discriminate dissimilar colours, but can also slowly learn to discriminate very similar colours, raising the question as to how the visual system can support this, or whether it is simply a learning and memory operation. We discuss the detailed neuroanatomical layout of the brain, identify probable brain areas for colour processing, and suggest that there may be multiple systems in the bee brain that mediate either coarse or fine colour discrimination ability in a manner dependent upon individual experience. These multiple colour pathways have been identified along both functional and anatomical lines in the bee brain, providing us with some insights into how the brain may operate to support complex colour discrimination behaviours.

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Chromatic properties of interneurons in the optic lobes of the bee

Cited by 127 publications

References 25 publications

Electrophysiology and anatomy of medulla interneurons in the optic lobe of the cockroach, Periplaneta americana

Electrophysiology and anatomy of medulla interneurons in the optic lobe of the cockroach, Periplaneta americana

Bees encode behaviorally significant spectral relationships in complex scenes to resolve stimulus ambiguity

Colour processing in complex environments: insights from the visual system of bees

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