Psychobiology McNeely Intro to Psychology 1 What in the world is this? The study of how behavior is influenced by our biological makeup. McNeely Intro to Psychology 2 MindBody •Monism •Dualism •Emergent dualism McNeely Intro to Psychology 3 • Central • Peripheral McNeely Intro to Psychology 4 McNeely Intro to Psychology 5 Picture McNeely Intro to Psychology 6 Picture McNeely Intro to Psychology 7 McNeely Intro to Psychology 8 • • Brai n Cerebral Cortex – Functions: • Thought • Voluntary movement • Language • Reasoning • Perception Cerebellum – Fxn • Movement • Balance • Posture Brain Stem – Fxns • Breathing • Heart Rate • Blood Pressure Hypothalamus – fxns • Body Temperature • Emotions • Hunger • Thirst • Circadian Rhythms McNeely Intro to Psychology • Thalamus – Functions: • Sensory processing • Movement • Limbic system • – Fxns • Emotions • LT memory • Hippocampus • – fxns • learning • Memory 9 • Picture for structure Neur ons McNeely Intro to Psychology 10 Birth & Deve lopm ent of the Brai n McNeely Intro to Psychology 11 http://www.brainmuseum.org/d evelopment/index.html McNeely Intro to Psychology 12 Neur al Migr ation McNeely Intro to Psychology 13 McNeely Intro to Psychology 14 McNeely Intro to Psychology 15 Neur al Com muni catio n McNeely Intro to Psychology 16 Actio n Pote ntial McNeely Intro to Psychology 17 McNeely Intro to Psychology 18 McNeely Intro to Psychology 19 Neur otran smitt ers McNeely Intro to Psychology 20 Perip heral Nerv ous Syst em Autonomic Somatic McNeely Intro to Psychology 21 Picture of Symp/Parasymp Auto nomi c Nerv ous Syst em McNeely Intro to Psychology 22 ANS/ PNS McNeely Intro to Psychology 23 Som atic McNeely Intro to Psychology 24 Neurotransmi tter Effects Too Much Too Drugs Acetylcholine Learning, memory, muscles Trembling Alzheim ers Caffeine Serotonin Sleep, mood, pain, aggression Migraines Depressi on Cocaine Dopamine Pleasure, reward, attention, arousal Schizophren ia Parkinso ns Cocaine, caffeine, nicotine, MDMA GABA General inhibition of neurons Drowsy Anxious Alcohol Glutimate General excitation of neurons Tingly numbin g Drowsy Caffeine Litt le McNeely Intro to Psychology 25 • Acetylcholine – involved in voluntary movement, learning, memory, and sleep § Too much acetylcholine is associated with depression, and too little in the hippocampus has been associated with dementia. Dopamine – correlated with movement, attention, and learning § Too much dopamine has been associated with schizophrenia, and too little is associated with some forms of depression as well as the muscular rigidity and tremors found in Parkinson’s disease. Norepinephrine – associated with eating, alertness § Too little norepinephrine has been associated with depression, while an excess has been associated with schizophrenia. Epinephrine – involved in energy, and glucose metabolism § Too little epinephrine has been associated with depression. Serotonin – plays a role in mood, sleep, appetite, and impulsive and aggressive behavior § Too little serotonin is associated with depression and some anxiety disorders, especially obsessive-compulsive disorder. Some antidepressant medications increase the availability of serotonin at the receptor sites. GABA (Gamma-Amino Butyric Acid) – inhibits excitation and anxiety § Too little GABA is associated with anxiety and anxiety disorders. Some antianxiety medication increases GABA at the receptor sites. Endorphins – involved in pain relief and feelings of pleasure and contentedness McNeely Intro to Psychology 26 McNeely Intro to Psychology 27 • ACTING IN THE ENVIRONMENT. MOTOR SYSTEMS AND DISORDERS. • Mapping the Motor Cortex • Wilder Penfield, a Canadian surgeon, took the next exploratory voyage of the brain's organization starting in the 1950s. While operating on epileptic patients, Penfield applied electric currents to the brain's surface in order to find problem areas. Since the patients were awake during the operations, they could tell Penfield what they were experiencing. Probing some areas would trigger whole memory sequences. For one patient, Penfield triggered a familiar song that sounded so clear, the patient thought it was being played in the operating room. During these operations, Penfield watched for any movement of the patients' bodies. From this information, he was able to map out the motor cortex, the part of the brain you mapped out in this feature's activity. McNeely Intro to Psychology 28 Sensory Neuron Brain Spinal Cord Motor Neuron pi cture s McNeely Intro to Psychology 29