Table 4.

Proportion of the different shapes of synaptic junctions in control and AD patients

Group	Type of synapse	Macular synapses	Perforated synapses	Horseshoe-shaped synapses	Fragmented synapses	Total synapses
Control	AS	83.8% (2145)	11.8% (302)	3.8% (98)	0.6% (16)	100% (2561)
	SS	83.5% (106)	3.9% (5)	12.6% (16)	0.0% (0)	100% (127)
Alzheimer	AS	81.4% (1558)	11.5% (221)	5.3% (101)	1.8% (35)	100% (1915)
	SS	92.5% (110)	6.7% (8)	0.8% (1)	0.0% (0)	100% (119)

Data are given as percentages with the absolute number of synapses studied in parentheses. Data for each individual case are represented in Table 4-1.