Table 2.

Locations of nonaminergic 5-HT-positive fibers in the brain of MAOA knock-outs

	E15 n = 4	E18 n = 5	P0 n = 6	P7 n = 6	P10 n = 2	P15 n = 1
Orbital cortex	a	a	−	+++	++	−
Gustatory cortex	a	a	+++	+++	++	−
Visceral cortex	a	a	+++	+++	++	−
Somatosensory cortex	a	a	+++	+++	++	−
Auditory cortex	a	a	+++	+++	++	−
Visual cortex	a	a	+++	+++	++	−
Thalamocortical tract	++	+++	+++	+++	++	−
Fimbria/Fornix	++	++	+	−	−	−
Ventral hippocampal commissure	++	++	+	−	−	−
Ventral fornix	++	++	−	−	−	−
Optic chiasm and tract	+++	+++	+++	++	+	−
Superior colliculus	−	++	+++	+++	+++	−
Inferior colliculus	−	−	+	++	−	−
Trigeminal tract	++	++	−	−	−	−

Staining intensity of fibers at prenatal and postnatal ages according to locations in the brain.

Fiber staining: − none; + light staining; ++ moderate staining; +++ heavy staining.

^F2-a Before birth, thalamocortical axons are still confined to the subplate.