a	Arachnoid
ANOVA	Analysis of variance
ATP	Adenosine triphosphate
bv	Blood vessel
CNS	Central nervous system
CRL	Crown-rump length
CSF	Cerebrospinal fluid
Cx37	Connexin 37
Cx40	Connexin 40
Dab1	Disabled-1
DAPI	4′,6-diamidino-2-phenylindole
dm	Dura mater
E	Embryonic day
GJ	Gap junctions
gm	Gray matter
HE	Hematoxylin eosin
HC	Hemichannels
HU	Human
ic	Inner mesenchymal condensation
lm	Loose mesenchyme
oc	Outer mesenchymal condensation
Panx1	Pannexin1
PBS	Phosphate buffered saline
PCR	Polymerase chain reaction
PFA	Paraformaldehyde
pm	Pia mater
SD	Standard deviation
ss	Subarachnoid space
yot	Yotari
wt	Wild-type