Fig. 9.6. A degenerating axon terminal in the neuropil of layer 2 in the primary visual cortex of a 35 year old monkey. The cytoplasm of the terminal has a core of clustered mitochondria surrounded by neurofilaments. At one side of the terminal is an aggregate of synaptic vesicles (arrows) where the terminal is forming asymmetric synapses with two dendritic spines.
