Psychology in Action (8e) by Karen Huffman PowerPoint  Lecture Notes Presentation Chapter 2: Neuroscience and Biological Foundations Karen Huffman, Palomar College ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e) Lecture Overview Neural Bases of Behavior Nervous System Organization A Tour Through the Brain Our Genetic Inheritance ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Neural Bases of Psychology Neuroscience: interdisciplinary field studying how biological processes relate to behavioral and mental processes ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Neural Bases of Psychology (Continued) Our nervous system consists of neurons (cells responsible for receiving and transmitting electrochemical information). ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Neural Bases of Psychology: The Structure of a Neuron ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Neural Bases of Psychology: Neural Communication Within a neuron, communication occurs through an action potential (neural impulse that carries information along the axon of a neuron). ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Neural Bases of Psychology: Neural Communication (Continued) Between neurons, communication occurs through transmission of neural information across a synapse by neurotransmitters (chemicals released by neurons that alter activity in other neurons). ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e) Neural Bases of Psychology: Neural Communication (Continued) Receiving neurons receive multiple messages from other neurons. These multiple messages then determine if an action potential occurs or not. ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Neural Bases of Psychology: Neural Communication (Continued) Note how the axon terminals of sending neurons almost completely cover the cell body of the receiving neuron. ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Neural Bases of Psychology: Applying Psychology to Everyday Life Key neurotransmitters: Serotonin Acetylcholine (ACh) Dopamine (DA) Norepinephrine (NE) Epinephrine (adrenaline) GABA (gamma aminobutyric acid) Endorphins ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Neural Bases of Psychology: Receptor Sites Normal message Blocked message (wrong shape) Agonistic drugs mimic shape and enhance neurotransmitter Antagonistic drugs fill the site and block neurotransmitter ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Neural Bases of Psychology: How Hormones Affect Us Endocrine System: collection of glands that manufacture and secrete hormones into the bloodstream ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Pause and Reflect: Check & Review _____ receive information from other neurons. The _____ carries the neuron’s messages to other body cells. How does neural communication within neurons differ from communication between neurons? ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Nervous System Organization Central Nervous System (CNS): brain and spinal cord Peripheral Nervous System (PNS): all nerves and neurons connecting CNS to the rest of the body (subdivided into the somatic and autonomic nervous systems) ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Nervous System Organization ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Nervous System Organization: Central Nervous System (CNS) Brain Spinal Cord (transmits information into and out of the brain ) ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Nervous System Organization: Central Nervous System (CNS) The spinal cord is also responsible for involuntary, automatic behaviors called reflexes. ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Nervous System Organization: Peripheral Nervous System (PNS) PNS connects CNS to the rest of the body and is subdivided into: Somatic Nervous System (SNS): connects to sensory receptors and controls skeletal muscles Autonomic Nervous System (ANS): controls involuntary bodily functions and is further subdivided into: Sympathetic Nervous System (arouses) Parasympathetic Nervous System (calms) ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Nervous System Organization: Anatomy and functions of the parasympathetic and sympathetic nervous systems ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Pause and Reflect: Check & Review You touch a hot stove and your hand immediately and reflexively pulls away. This action was controlled by _____. You are startled by the sight and sound of a fierce dog rushing toward you. It is most likely that your _____ is dominant. ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through the Brain ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain: Hindbrain Three key structures of the hindbrain: Medulla: life survival functions Pons: respiration, movement, waking, sleeping, and dreaming Cerebellum: coordination of fine muscular movements, balance, and some aspects of perception and cognition ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain (Continued) Midbrain: collection of brain structures in the middle of the brain; coordinates movement patterns, sleep, and arousal Reticular Formation: runs through the hindbrain, midbrain, and brainstem; screens incoming information and controls arousal ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain (Continued) Forebrain: collection of upper-level brain structures, including the thalamus, hypothalamus, and limbic system Thalamus: relays sensory messages to the cerebral cortex Hypothalamus: responsible for emotions, drives, and regulating the body’s internal environment ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain (Continued) Limbic System: interconnected group of forebrain structures involved with emotions, drives, and memory ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Pause and Reflect: Check & Review What are the three key structures of the hindbrain? The _____ includes the thalamus, hypothalamus, and limbic system. ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain: Cerebral Cortex Cerebral Cortex: thin surface layer on the left and right cerebral hemispheres; regulates most complex behavior, including sensations, motor control, and higher mental processes ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain: Lobes of the Cerebral Cortex (Cont.) ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain: Lobes of the Cerebral Cortex Frontal Lobes: receive and coordinate messages from other lobes; responsible for motor control, speech production, and higher functions, such as thinking, personality, emotion, and memory ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Pause and Reflect: Critical Thinking Phineas Gage’s mining accident sent a 13-pound tamping iron through his frontal lobes. How did this affect his short- and long-term behavior and mental processes? ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain: Lobes of the Cerebral Cortex (Cont.) Parietal Lobes: located at the top of the brain directly behind the frontal lobes; responsible for interpreting bodily sensations Temporal Lobes: located on each side of the brain above the ears; responsible for audition, language comprehension, memory, and some emotional control ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain: Lobes of the Cerebral Cortex (Cont.) Occipital Lobes: located at the back of the brain; responsible for vision and visual perception ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain: Motor Cortex and Somatosensory Cortex ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Pause and Reflect: Critical Thinking Why are the hands and face on this drawing so large? What do they represent? ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

A Tour Through The Brain: Lateralization The left and right hemispheres of your brain each specialize in particular operations. ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Pause and Reflect: Check & Review What are the major functions of the four lobes of the brain? The _____ hemisphere is primarily responsible for language, and it controls the right side of the body. ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Our Genetic Inheritance Behavioral Genetics: studies the relative effects of nature (heredity, genes, and chromosomes) and nurture (environment) on behavior and mental processes ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Our Genetic Inheritance: Genes & DNA The nucleus of every cell contains genes, which carry the code for hereditary transmission. These genes are arranged along chromosomes (strands of paired DNA). ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Our Genetic Inheritance: Genes & DNA Tongue-curling is one of the few traits that depends on a specific dominant gene. ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Our Genetic Inheritance: Twin Research ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Our Genetic Inheritance Evolutionary Psychology: studies how natural selection and adaptation help explain behavior and mental processes ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Our Genetic Inheritance Sex differences in lateralization. Note how activation is confined to only one hemisphere in the male brain on the left, and how it occurs on both hemispheres in the female brain on the right. ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Our Genetic Inheritance: Better Living Through Neuroscience Neuroplasticity: brain’s lifelong ability to reorganize and change its structure and function Neurogenesis: division and differentiation of nonneuronal cells to produce neurons Stem Cells: precursor (immature) cells that give birth to new specialized cells ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

Pause and Reflect: Why Study Psychology? Understanding neurogenesis, neuroplasticity, and stem cells helps make us better informed consumers of scientific research and more knowledgeable participants in political debates. President Bush could use this info to make more informed decisions! ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)

End of Chapter 2: Neuroscience and Biological Foundations Psychology in Action (8e) by Karen Huffman PowerPoint  Lecture Notes Presentation End of Chapter 2: Neuroscience and Biological Foundations Karen Huffman, Palomar College ©John Wiley & Sons, Inc. 2007 Huffman: Psychology in Action (8e)