Chronic Ultrasound Prenatal Stress Altered the Brain’s Neurochemical Systems in Newborn Rats

Figure 6

PCA of all biochemical parameters stratified according to sex and group: (a) biplots of the variables for the frontal cortex; (b) biplots of the variables for the hippocampus; (c) biplots of the variables for the whole brain; PS: prenatal stress; Dim1: component 1; Dim2: component 2; cos2: the degree of the variable representation in each component—high cos2 attributes are colored in green, low cos2 attributes have a black color; DA, dopamin; DOPAC, 3,4-dihydroxyphenylacetic acid; D/D, DOPAC/dopamine ratio; Ser, serotonin; HIAA, 5-hydroxyindoleacetic acid; H/S, HIAA/serotonin ratios; NE, norepinephrine; BDNF, brain-derived neurotrophic factor; MSH, α-melanocyte-stimulating hormone; SP, substance P; END, β-endorphin; NT, neurotensin; OX, oxytocin.

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