Spine-like astrocytic protrusions into large axon terminals.
D000818:Animals; D001369:Axons / Q000166:cytology*; D003712:Dendrites; D008722:Methods; D008854:Microscopy, Electron; D009457:Neuroglia / Q000166:cytology*; D051381:Rats; D012270:Ribosomes; D013569:Synapses / Q000166:cytology; D013788:Thalamus / Q000166:cytology*