Table 3.

Data summary for Experiment 3 - Effects of short-term B exposure on structural plasticity in PL

Treatment	Sham	200B – 1 week
Animals	6	5
Neurons	34	26
Neurons/animal	5–6	5–6
Laminae Analyzed	Layers 2 and 3	Layers 2 and 3
Spines	13,095	10,763
Overall Spine Density ± SEM	2.91 ± 0.13	2.87 ± 0.10
Thin Spine Density ± SEM	2.37 ± 0.11	2.35 ± 0.07
Mushroom Spine Density ± SEM	0.45 ± 0.02	0.42 ± 0.03
Stubby Spine Density ± SEM	0.09 ± 0.01	0.10 ± 0.01
Neurons/animal – dendritic arborization analysis	4–5**	4–5**
Apical dendrite length	1814 ± 261	1679 ± 167
Apical branch endings	12 ± 1.5	11 ± 1.1
Basal dendrite length	329 ± 38	340 ± 30
Basal branch endings	2.8 ± 0.22	2.9 ± 0.17

^*Indicates significant difference (p < 0.05) when compared to control treatment group.

^**Due to strict inclusion criteria, the number of neurons analyzed in the dendritic arborization analysis is smaller than the number of neurons analyzed in the dendritic spine analysis.