| Summary: | 碩士 === 國立清華大學 === 生物科技研究所 === 104 === The central complex in the Drosophila has been implicated in flight control (Ilius et
al., 1994), multimodal information processing (Muller et al., 1997), the coordination
of motor behavior (Strauss and Heisenberg, 1993; Martin et al., 1999; Strauss, 2002;
Poeck et al., 2008), courtship behavior (Popov et al., 2003, 2004), visual pattern
memory (Liu et al., 2006; Pan et al., 2009), olfactory memory (Wu et al., 2007),
spatial orientation (Heinze and Homberg, 2007), and spatial orientation memory
(Neuser et al., 2008). As part of central complex, the ellipsoid body also plays a
critical key role in locomotion control and is regarded as one of the learning and
memory centers. Although the neural architecture of the central complex has been
reported upon in various studies, little is known about the EB at the level of a single
neuron. Since the EB is one of the integrative centers in the Drosophila brain, the
architectures, morphology and neuron types in the EB must be analyzed at the single
neuron level. It includes neurons of types that have not been identified before. For
example, each small-field neuron has four branching regions, whereas the others have
no more than three branching regions. EB single neurons not only connect within the
substructures of the central complex but also project to the accessory region, which
includes lateral triangles (LTRs) and inferior dorsofrontal protocerebra (IDFP); they
also form a loop among the PB, IDFP, and EB. While in large-field neurons, we also
defined some types of neurons that have not been destinquished formally before. This
study provides a further investigation in relationships between substructures within
the central complex or the accessory regions, and more details about architectures and
neurons types in the EB at single neuron level.
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