. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CYPRID NEUROANATOMY 155. Figure 10. Longitudinal sections of the untennular soma cluster (ASC). (A) Light micrograph of the ASC shows its position relative to the brain, and association with the antennular nerve (AnN). The bipolar cells in this cluster are likely candidates for receptor cells that project to distal setae. (B) Electron micrographs of the ASC do not reveal synapses in this region, as would be expected for motor neurons, suggesting that these cells do not form a ganglion of antennular motorneurons as previously
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CYPRID NEUROANATOMY 155. Figure 10. Longitudinal sections of the untennular soma cluster (ASC). (A) Light micrograph of the ASC shows its position relative to the brain, and association with the antennular nerve (AnN). The bipolar cells in this cluster are likely candidates for receptor cells that project to distal setae. (B) Electron micrographs of the ASC do not reveal synapses in this region, as would be expected for motor neurons, suggesting that these cells do not form a ganglion of antennular motorneurons as previously suggested (discussed in text). location of efferent cell soma within the central nervous system is not known, but cells located ventrolateral to the median protocerebral neuropil that project anteriorly in the deutocerebrum are possible candidates (see Fig. 3B). The location of cells that control the release from the antennular glands for temporary attachment and the ex- plosive release from cement glands for permanent attach- ment remains to be shown. Thoracic appendages and caudal mini. The nerves that project to the thoracic appendages are, together witli the antennular nerve, the most obvious peripheral extensions from the central nervous system. Thoracic appendages are used for swimming and bear many setae (Glenner and H0eg, 1995). These appendages, however, serve a natatory func- tion, and it is not known whether the setae play a sensory role. Setae are also present on the caudal rami (Walker and Lee, 1976; Glenner and H0eg, 1995), and behavioral obser- vations suggest that caudal rami might play a sensory role (Crisp and Barnes, 1954). The nervous system and settlement Cyprids settle in response to a range of environmental cues. It follows that the cyprid nervous system must sort and process input from various sense organs, and coor- dinate an appropriate behavioral response. We have traced neural connections between the central nervous system and many of the peripheral
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
