fly_medulla — Drosophila optic medulla connectome (2013)

Description

Directed network of synaptic connections between neurons in the optic medulla of the fruit fly Drosophila melanogaster, reconstructed by Takemura et al. from serial-section transmission electron microscopy of a volume spanning seven medulla columns. Neuron segments were traced semi-automatically and proofread by human annotators. Each edge is one synaptic contact, from the presynaptic to the postsynaptic body, so that a pair of bodies connected by several synapses is joined by parallel edges (33,641 synapses between 1,781 bodies). The bodies include identified neurons (named by cell type) and unidentified "orphan" fragments that could not be traced to a cell.

The network has the following properties:

Nodes: name, the cell-type label followed by the body identifier (e.g. "Mi1 ..."), or the body identifier alone for unnamed bodies.
Edges: pre_x, pre_y, pre_z and post_x, post_y, post_z, the voxel coordinates of the presynaptic and postsynaptic sites in the image volume; proofreading, the proofreading status of the synapse (e.g. whether the partners reached named or "anchor" bodies, or are both orphans).

The data were obtained from the graph collection of the Open Connectome Project (now NeuroData), whose servers are offline, via the Internet Archive.

Tags

Biological Connectome Unweighted Multigraph Metadata

Citation

S. Takemura et al., "A visual motion detection circuit suggested by Drosophila connectomics." Nature 500, 175-181 (2013) 10.1038/nature12450 Sci-Hub

Upstream URL OK

https://web.archive.org/web/20160420202242/http://openconnecto.me/graph-services/download/

Networks

Tip: hover over a column header for a description.

Column legend

$\left<k\right>$: Mean degree
$\sigma_k$: Standard deviation of the degrees
$\lambda_h$: Largest eigenvalue of the Hashimoto (non-backtracking) matrix
$\tau$: Random walk mixing time
$r$: Degree assortativity
$c$: Global clustering coefficient
$\oslash$: (Pseudo-) diameter
$S$: Relative size of the largest component
NPs: Node properties
EPs: Edge properties

Name	Nodes	Edges	$\left<k\right>$	$\sigma_k$	$\lambda_h$	$\tau$	$r$	$c$	$\oslash$	$S$	Kind	Mode	NPs	EPs	gt	GraphML	GML	csv
fly_medulla	1,781	33,641	18.89	390.12	41.93	4.94	-0.32	0.08	6	0.99	Directed	Unipartite	name	pre_x pre_y pre_z post_x post_y post_z proofreading	234 KiB	394 KiB	380 KiB	397 KiB