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A. Mean bilateral neuronal soma sizes in the four MeA subnuclei. Male hamsters reared in LD had larger neuronal somata in the MeApd and MeApv subnuclei than males raised in SD (both ps ≤ 0.01). The anterior subnuclei were not affected by photoperiod. B. Photomicrograph of MeApd somata from an SD hamster. C. Photomicrograph of MeApd somata from an LD hamster. Bar = 5 μm.
