title: Pineal structure and wheel-running activity in rats.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000648:ultrastructure; D008124:Locomotion; D008297:Male; D010870:Pineal Gland / Q000648:ultrastructure*; D051381:Rats; D011919:Rats, Inbred Strains; D013045:Species Specificity