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. Author manuscript; available in PMC: 2010 Apr 21.
Published in final edited form as: Neuroscience. 2009 Feb 25;160(1):42–50. doi: 10.1016/j.neuroscience.2009.02.031

Fig. 4. Synaptic spinule formation and recovery.

Fig. 4

(A) - After high K+ depolarization, synaptic spinules (arrows) were also found in inhibitory synapses which lack prominent PSDs (double arrowheads). (B) - Spinules disappeared quickly after cessation of stimulation and a few min of returning to normal medium. The PSD is still thickened in this excitatory synapse. (C) - Spinule (arrow) in an inhibitory synapse after NMDA treatment. (D) - Spinule (arrow) in an excitatory synapse after NMDA treatment. The PSD is visibly thickened. Scale bar = 0.1 μm.