In the adult mammalian nervous system, sex differences can be manifested independently or in concert with sex-specific hormone cycles, such as the rat estrous cycle. Biological sex and related cycles influence neuronal properties in many brain regions, including the striatum, encompassing the nucleus accumbens (NAc) core, NAc shell, and caudate-putamen (CPu). While neuron soma size and density are commonly assessed in the cont...

Previous research using functional MRI identified brain regions associated with sensory processing sensitivity (SPS), a proposed normal phenotype trait. To further validate SPS, to characterize it anatomically, and to test the usefulness in psychology of methodologies that assess axonal properties, the present study correlated SPS proxy questionnaire scores (adjusted for neuroticism) with diffusion tensor imaging (DTI) measure...