Aspartic Acid/metabolism; Corpus Striatum/metabolism; Dopamine/metabolism; Hereditary Central Nervous System Demyelinating Diseases/metabolism; Malates/metabolism; Mitochondrial Diseases/metabolism; Mitochondrial Membrane Transport Proteins/metabolism; Psychomotor Disorders/metabolism; Substantia Nigra/metabolism; Amino Acid Transport Systems, Acidic/deficiency; Amino Acid Transport Systems, Acidic/genetics; Amino Acid Transport Systems, Acidic/metabolism; Animals; Antiporters/deficiency; Antiporters/genetics; Antiporters/metabolism; Aspartic Acid/physiology; Corpus Striatum/cytology; Dopamine/deficiency; Dopamine/genetics; Emotions/physiology; Exploratory Behavior/physiology; Female; Hereditary Central Nervous System Demyelinating Diseases/genetics; Hereditary Central Nervous System Demyelinating Diseases/physiopathology; Male; Mice; Mice, 129 Strain; Mice, Inbred C57BL; Mice, Knockout; Mitochondrial Diseases/genetics; Mitochondrial Diseases/physiopathology; Mitochondrial Membrane Transport Proteins/deficiency; Mitochondrial Membrane Transport Proteins/genetics; Motor Skills Disorders/genetics; Motor Skills Disorders/metabolism; Neural Pathways/cytology; Neural Pathways/metabolism; Neural Pathways/physiopathology; Oxidative Stress/physiology; Pregnancy; Psychomotor Disorders/genetics; Psychomotor Disorders/physiopathology; Substantia Nigra/cytology