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http://dx.doi.org/10.15324/kjcls.2018.50.3.284

Development of Central Nervous System in Scuttle Fly  

Park, Ho-Hyun (Department of Biomedical Laboratory Science, Mokpo Science University)
Park, Mi-Suk (Department of Medical Laboratory Science, Gimhae College)
Na, Kil-Ju (Department of Radiology Science, Mokpo Science University)
Publication Information
Korean Journal of Clinical Laboratory Science / v.50, no.3, 2018 , pp. 284-288 More about this Journal
Abstract
The scuttle fly central nervous system (CNS) is unobservable during egg and larvae instar stage 1. During days 2~3 of larvae instar stage 2, the left and right hemisphere of the brain can be observed. Below the brain, the subesophageal ganglion (SOG) connects to the ventral nerve cord (VNC). During days 3~5 of larvae instar stage 3, the CNS enlarged slightly with no other changes. During days 1~3 of the pupal stage the CNS moved to the head with no distinguishable changes from the previous stage. During days 4~6 of the pupal stage, the left and right hemisphere of the brain had fused into one mass and the optic lobe (OL) located on the side of the brain completed its development. During days 7~9 of the pupal stage, the OL began to show eyeball pigment. The SOG was connected to the brain and the VNC began to separate, which was accompanied by an increase in nerve fibers. During days 10~12 of the pupal stage, the brain of the CNS and VNC was clearly distinguished and the brown pigmentation of OL became darker. During days 13~15 days of the pupal stage, the separated brain and VNC became connected by thin nerve fiber. The VNC began to separate into two with a greater increase in nerve fibers. The adult fly showed similar features to the previous stage, but the brain was located in the head and the VNC in the chest.
Keywords
Brain; Central nervous system; Megaselia scalaris; Scuttle fly; Ventral nerve cord;
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