FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term adult posterior lateral fascicle ID (Ontology) FBbt:00007083 (Fly Anatomy)
Definition An arch-like bundle of neuronal fibers in the adult brain connecting the posterior lateral protocerebrum (PLP) and the superior intermediate protocerebrum (SIP) (Ito et al., 2014). It demarcates the boundary between the superior clamp and lateral horn/superior lateral protocerebrum (SLP) (Ito et al., 2014). The posterior lateral fascicle makes a steep curve near the anterior medial edge of the lateral horn (LH), where it narrowly intersects the trajectories of the mALT, mlALT and lALT. It can be divided into four components, dorsolateral, dorsomedial, ventral and external, based on lineage (DPLpv, CP2/3, BLVp1/2 and BLP1/2, respectively) (Lovick et al., 2013).[ FlyBase:FBrf0219809 FlyBase:FBrf0223329 FlyBase:FBrf0224194 FlyBase:FBrf0239233 FlyBase:FBrf0239234 ]
Also Known As "PLF"
Comment Some of the olfactory projection neurons send collateral branches to the PLP via the lateral section of the posterior lateral fascicle, and to the SIP via the superior section of the posterior lateral fascicle (Tanaka et al., 2012). From Strausfeld pg 99 in Musca Domestica (FBrf0239233, FBrf0239234). Confirmed as present in Drosophila melanogaster by VH.
Links to External Ontologies
VFB:FBbt_00007083
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  fascicle
   |__posterior lateral fascicle
       |__adult posterior lateral fascicle
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Is a posterior lateral fascicle
Develops from larval posterior lateral fascicle
Part of adult protocerebrum
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VFB:FBbt_00007083