Table 1: Effect of nicotine administration on nissl substances staining.

Nissl substances intensity
	Hippocampal		Striatum
	Female	Male	Female	Male
Notation: Intense: ++
Moderate/mild: + –
Control	++	+−	++	+−
0.25 mg/kg	++	++	++	+−
2 mg/kg	++	+−	++	+−
4 mg/kg	++	+−	++	+−