PSY 101 1st Edition Lecture 4 Outline of Last LectureI. The Correlation MethodII. Experimental MethodLimitations of ExperimentsIII. Double- BlindIV. Quasi- ExperimentParticipant Related ViolenceV. Subject’s RightsOutline of Current Lecture I. What does an EEG measure?II. Other Brain ImagingIII. Neurons have 3 partsIV. Electrical impulse changes permeabilityAll- or –none firing: neurons will fire everything or nothingV. How do neurons differ?VI. Neurotransmitters= chemical messengersVII. Human Nervous SystemCurrent LectureI. What does an EEG measure? A. It measures the amount of electrical activity in the brainII. Other brain imaging:A. CT scan (series of x- rays)B. MRI (magnets, not x-rays)C. PET scan (radioactive glucose)D. fMRI (faster, more detailed picture)III. Neurons have 3 parts:A. Cell body (soma)B. Dendrites (receives messages)C. Axon (Sends messages)D. Info carried out the axonE. communication is synapticThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.IV. Electrical impulse changes permeability A. resting potential (-70 millivolts) B. action potential (+50 millivolts)V. All- or –none firing: neurons will fire everything or nothingVI. How do neurons differ?A. Myelin (structure along the axon)B. Diameter (the thicker and greater the insulation, the faster it works)VII. Neurotransmitters= chemical messengersA. can be excitatory or inhibitoryB. for a cell to fire, the excitatory has to outweigh the inhibitory aspectsVIII. Human Nervous SystemA. Peripheral Nervous System - somatic nervous system - the autonomic nervous system - sympathetic nervous system: active when you are using self-defense - parasympathetic nervous system: bringing heightened responses back to normalB. Central Nervous System (Brain and spinal cord) - spinal cord: sends messages to brain and PNS - hindbrain: link between spinal cord and brain - midbrain: relay station between hindbrain and forebrain (higher level processes) - forebrain: controls higher level, cognitive, motor functionsBrain Structures:A. Cerebellum- coordination of movementB. cerebral cortex- personality, thought, abstract reasoning, motor responsesC. corpus callosum- creates the communication between the right and left hemisphereD. Hypothalamus- motivated behavior (eating, drinking, sexual behavior, etc…)E. MedullaF. PonsG. Reticular FormationH.