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PSY 101: Biological Bases of Behavior

by: Alvin Notetaker

PSY 101: Biological Bases of Behavior PSY 101

Marketplace > Arizona State University > Psychlogy > PSY 101 > PSY 101 Biological Bases of Behavior
Alvin Notetaker
GPA 3.33

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About this Document

Just notes about the nervous, lobes, brains, Genes and behavior
Introduction to Psychology
Class Notes
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This 4 page Class Notes was uploaded by Alvin Notetaker on Sunday January 31, 2016. The Class Notes belongs to PSY 101 at Arizona State University taught by Mae in Winter2014. Since its upload, it has received 30 views. For similar materials see Introduction to Psychology in Psychlogy at Arizona State University.

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Date Created: 01/31/16
Biological Bases of Behavior:    ● Franz Gall  ○ Phrenology​ ­ The link between body and mind is linked to the head. Determine  your personality based on the head    ● Nervous Tissue  ○ Gila cells ­ Provide nutrients; oxygen, structure, insulation, repair  ○ Neurons ​ ­ receive, integrate, transmit info    ● Neurons chilling out  ○ Resting potential is abo­70 mV  ● Neurons in action  ○ Action potential fires when is has more positive charge.  ○ It travels down the axon  ○ The absolute refractory period is about 1 millisecond where the firing stop  ● Postsynaptic potentials  ○ Excitatory ­ potential fire morelikely  ○ Inhibitory ­ potential fire lelikely  ● Putting on the Brakes  ○ Reuptake​  ­ Neurotransmitters ​ponged up  ○ Enzyme activation ­ Neurotransmitters arbroken down    ● Example Neurotransmitters & associated with  ○ Dopamine: ​ Schizophrenia = too much  ○ Serotonin​ : Depression = not enough  ○ Norepinephrine​ : Anxiety = too much  ○ GABA​ : Overeating = not enough  ○ Endorphins​ : Reduce pain  ○ Acetylcholine​: Dementia memory loss = not enough    ● How Drugs work…  ○ Agonist excite (need more)  ■ By mimicking  ■ blocking reuptake  ○ Antagonist inhibit (need less)  ■ inhabiting release  ■ blocking receptor    ● The Nervous System  ○ Central Nervous System  ■ Nerves in the ​rain and spinal cord  ○ Peripheral Nervous System  ■ Rest of the nerves  ● Somatic Nervous System  ○ Afferent fibers ­ to the brain  ○ Efferent fibers ­ from the brain  ● Autonomic Nervous System  ○ Sympathetic Nervous System ­ mobilizes resources  ■ To/From voluntary muscles and sensory receptor  ○ Parasympathetic Nervous System ­ conserves resources  ■ To/From automatic function    ● Central Nervous System  ○ Brain/Body communication  ○ Determination of speed  ■ Type of fiber  ■ Distance Traveled  ○ Contralaterality    ● The Lobes  ○ 1) ​Frontal Lobe​ ­ Higher level function  ■ Decision making  ■ movement  ■ impulse control  ○ 2) ​Parietal Lobe ­   ■ Tactile  ○ 3) ​Occipital Lobe ­   ■ Visual  ○ 4) ​Temporal Lobe​  ­   ■ Olfactory  ■ Auditory  ■ Gustatory  ■ Language      ● The Brain  ○ Phineous Gage ­ survived serious brain penetration  ○ Lower brain​  ­ Unconscious life function  ■ Cerebellum​  ­ coordination and movement  ■ Medulla​  ­ automamic function  ■ Pons​  ­ sleep and arousal   ■ Reticular function­ reflex and pain perception  ○ Higher cerebral hemisphere ­ Emotion, Drives, Memory, Complex thought  ■ Thalamus​  ­ pathway to process  ■ Hypothalamus​  ­ drives related to survival  ■ Amygdala​  ­ emotion memory  ■ Limbic System​  ­ pleasure center  ○ Four Fs  ■ Fighting  ■ Fleeing  ■ Feeding  ■ Mating  ○ Higher Brain (Cerebrum)  ■ Cerebral Cortex  ■ Cerebral Hemisphere  ■ Corpus callosum​  ­ connect right and left hemisphere    ● Hemispheric Specialization  ○ Left ­ Verbal  ■ Wernicke’s area ­ language comprehension  ■ Broca’s area ­ ability to speak  ○ Right ­ Non­verbal  ■ good to pick up subtle differences  ○ It not exclusivity, just specialization  ● Flexibility of the Brain  ○ Neurogenesis​  ­ regrow  ■ Brain cells of children compare to brain cells of adult. Children can  regrow brain cells because the brain pulls from its reserves.  ○ Specialization and integration  ○ Plasticity­ Ability to change and “mold”    ● Tools  ○ EEG​  ­ Measure electrical voltage (brain wave)  ○ CAT & MRI​  ­ X­ray of the brain structures  ○ PET​  ­ Measure brain activity  ○ fMRI​  ­ Measure brain activity without need for radioactive injection.    ● Genetics & Behavior  ○ Chromosomes  ■ DNA  ● Genes  ○ Alleles ­ version of Gene  ○ Genotypes​  ­ collection of genes that causes phenotypes  ○ Phenotypes​  ­ expression through physical means and to be able to be observe.  ○ Dominant Genes​ ­ the one being express most of the time  ○ Recessive Genes​  ­ the one that is being carried until it expressed when there is no  dominant genes.  ○ Monogenic​  ­ regulated by one gene   ○ Polygenic ​­ regulated by multiples genes    ● Genes account for 20%­30% of variatio in every human behavior  ● PKU (phenylketonuria) ­ monogenic, recessive  ● Huntington disease ­ monogenic, dominant  ● Mental illnesses w/ genetic component  ○ Schitcophrenina  ○ Mood disorder  ■ Depression, Bipolar  ○ Anxiety disorder  ■ panic disorder and OCD  ■ Polygenic  ● Nature/Nurture 


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