Hypothalamo-Hypophyseal System/drug effects; Odorants; Prosencephalon/drug effects; Proto-Oncogene Proteins c-fos/drug effects; Smell/drug effects; Stress, Psychological/drug therapy; Administration, Inhalation; Aldehydes/pharmacology; Amygdala/drug effects; Amygdala/metabolism; Animals; Biomarkers/metabolism; Cell Count; Corticosterone/metabolism; Disease Models, Animal; Down-Regulation/drug effects; Down-Regulation/physiology; Fear/drug effects; Fear/physiology; Hexanols/pharmacology; Hippocampus/drug effects; Hippocampus/metabolism; Hypothalamo-Hypophyseal System/metabolism; Hypothalamo-Hypophyseal System/physiopathology; Male; Midline Thalamic Nuclei/drug effects; Midline Thalamic Nuclei/metabolism; Paraventricular Hypothalamic Nucleus/drug effects; Paraventricular Hypothalamic Nucleus/metabolism; Pituitary-Adrenal System/drug effects; Pituitary-Adrenal System/metabolism; Pituitary-Adrenal System/physiopathology; Prosencephalon/metabolism; Prosencephalon/physiopathology; Proto-Oncogene Proteins c-fos/metabolism; Rats; Rats, Wistar; Restraint, Physical/adverse effects; Smell/physiology; Stress, Psychological/metabolism; Stress, Psychological/physiopathology; Weight Loss/drug effects; Weight Loss/physiology