BIOLOGICAL BASES OF BEHAVIOR 8 – 10 %
BIOLOGICAL BASES OF BEHAVIOR 8 – 10 %
PEOPLE:
PAUL BROCA – BROCA’S AREA
CHARLES DARWIN – EVOLUTION
MICHAEL GAZZANIGA – SPLIT BRAIN RESEARCH
ROGER SPERRY – SPLIT-BRAIN RESEARCH & FUNCTION
CARL WERNICKE – WERNICKE’S AREA
RESEARCH STRATEGIES:
CASE STUDIES
SPLIT BRAIN RESEARCH
IMAGING – CAT(COMPUTERIZED AXIAL TOMOGRAPHY = BRAIN X-RAY), PET (POSITRON EMISSION TOMOGRAPHY – GLUCOSE = FUNCTIONING AREAS), MRI (MAGNETIC RESONANCE IMAGING = ONLY STRUCTURE), F-MRI (FUNCTION = BLOOD FLOW), EEG (BRAIN WAVES = CONSCIOUSNESS & SLEEP)
SURGICAL – LESIONING, PSYCHOSURGERY, ACCIDENTS (PHINEAS GAGE)
NEUROANATOMY (NEURON PARTS)
DENDRITES, SOMA (CELL BODY) AXONS, TERMINAL BRANCHES/BUTTONS, MYELIN SHEATH, SYNAPSE (SYNAPTIC GAP/CLEFT)
TYPES OF NEURONS – SENSORY/AFFERENT, INTERNEURONS,
MOTOR/EFFERENT
WORKING OF NEURON – Electrochemical process, ACTION
POTENTIAL, RESTING POTENTIAL, SODIUM POTASSIUM PUMP, ALL-OR-NONE LAW, REFRACTORY PERIOD
NEUROTRANSMITTERS – ACETYLCHOLINE (MOTOR
MOVEMENT FUNCTION – LACK = ALZHEIMER’S), DOPAMINE (MOTOR MOVEMENT & ALERTNESS -LACK = PARKINSON, TOO MUCH = SCHIZOPHRENIA), ENDORPHINS (PAIN CONTROL – ADDICTIONS), SEROTONIN ( MOOD CONTROL – LACK = CLINICAL DEPRESSION), EPINEPHRINE &NOREPINEPHRINE)
NERVOUS SYSTEM – PERIPHERAL VS CENTRAL (SPINAL
CORD & BRAIN = REFLEXES), AUTONOMIC (AUTOPILOT – FIGHT OR FLIGHT) VS SOMATIC (VOLUNTARY MUSCLE MOVEMENT), SYMPATHETIC (ALERT/AROUSED) VS PARASYMPATHETIC (CALMING)
BRAIN PARTS:
HINDBRAIN (TOP PART OF SPINAL CORD – LIFE SUPPORT)
MEDULLA (BLOOD PRESSURE, HR, BREATHING)
PONS (CONNECTS HIND W/MID & FOREBRAIN – FACIAL
EXPRESSIONS)
RETICULAR FORMATION/RETICULAR ACTIVATING SYSTEM – (AROUSAL, FOCUS ATTENTION, W/O DEEP COMA)
MIDBRAIN – SIMPLE MOVEMENTS, SENSORY INFO W/
MUSCLE MOVEMENT
THALAMUS – PROCESSING CENTER
HYPOTHALAMUS – TEMP, LIBIDO, HUNGER,
THIRST, BIOLOGICAL RHYTHMS, ENDOCRINE SYSTEM
AMYGDALA – EMOTION & ANGER
HIPPOCAMPUS – MEMORY PROCESSING
LIMBIC SYSTEM (THALAMUS, HYPOTHAL, AMYG, HIPPO -EMOTION & MEMORY)
FOREBAIN – (THOUGHT & REASONING)
CEREBRAL CORTEX – GRAY, WRINKLED (FISSURES), LAYERS
OF NEURONS
HEMISPHERES (CROSS WIRED= CONTRALATERAL
CONTROL),
BRAIN LATERALIZATION
HEMISPHERIC SPECIALIZATION,
SPLIT-BRAIN PATIENTS – CORPUS CALLOSUM (CUT FOR EPILEPSY) – CAN’T ORALLY REPORT INFO ONLY PRESENTED TO RIGHT
LEFT – LOGICAL & SEQUENTIAL TASKS,SPOKEN LANG.
RIGHT – SPATIAL & CREATIVE TASKS
CEREBRAL CORTEX – 8 DIFF LOBES (4 IN EACH HEMISPHERE = F, P, T, O)
ASSOCIATION AREAS – JUDGEMENT, HUMOR
FRONTAL LOBES (BEHIND EYES)—ANTERIOR LOBE
(PREFRONTAL CORTEX) DEALS W/PLANNING, MAINTAINING EMOTIONAL CONTRAL, PURSUING GOALS, PHINEAS GAGE), BROCA’S AREA – MUSCLE MOVEMENT TO PRODUCE SPEECH, MOTOR CORTEX – SIGNALS TO MUSCLES – TOP PART CONTROLS FEET & TOES AND UPWARD
PARIETAL LOBES – SENSORY CORTEX/SOMATO-SENORY
CORTEX = RECEIVES INCOMING TOUCH SENSATIONS, TOP GETS MESSAGES FROM BOTTOM OF BODY AND SO ON
OCCIPITAL LOBES – INTERPRET MEESSAGES FROM EYES IN OUR VISUAL CORTEX, IMAGES FROM RIGHT HALF OF EACH RETINA PROCESSED IN VISUAL CORTEX IN RIGHT OCCIP. LOBE
TEMPORAL LOBES – AUDITORY CORTEX = NOT LATERALIZED = USE BOTH HEMISPHERES, WERNICKE’S AREA = INTERPRET, WRITTEN & SPOKEN SPEECH/MEANING
BRAIN PLASTICITY – BRAIN ADAPTS TO OTHER FUNCTIONS, DENDRITES (ESP. CHILDREN) MAKE NEW CONNECTIONS IN DIFF PART TO TAKE OVER FOR DAMAGED PART OF BRAIN
ENDOCRINE SYSTEM – HYPOTHALAMUS CONTROLS,
HORMOMES (SLOWER BUT LONGER), PITUITARY GLAND (MASTER & GROWTH, ADRENAL GLAND = EPINEPHRINE & NOREPINEPHRINE (HR & BLOOD PRES)
GONADS (OVARIES & TESTES) SEX HORMONES = ESTROGEN & TESTOTERONE
GENETICS – PUNNET SQUARE (Rr, RR, rr, Rr) – MENDEL & PEAS, NATURE, 23 PAIRS OF CHROMOSOMES (46), DNA = GENETIC MATERIAL MAKING UP CHOROMSOMES (CONTROL SOME TRAITS), SEGMENTS = GENES (DOMINANT VS RECESSIVE)
TWINS – IDENTICAL (MONOZYGOTIC), THOMAS BOUCHARD – SEPARATED IDENTICAL TWINS STUDY – GENES MATTER, CRITICISM = HAVE SAME EFFECTIVE PSYCHOLOGICAL ENVIRONMENT B/C LOOK SAME SO TREATED SIMILAR IN LIFE
CHROMOSOMES – XY (BOY), XX (GIRL), FATHER GIVES, ABNORMALITIES = TURNER’S SYNDROME (ONLY SINGLE X WHERE 23RD PAIR SHOULD BE – SHORTNESS & DIFF PHYS SEXUAL DEVELOPMENT), KLINEFELTER’S SYNDROME (XXY= MINIMAL SEXUAL DEV. & INTROVERSION, DOWN SYNDROME = EXTRA CHOROMSOME ON 21ST PAIR = MENTAL RETARDATION & PHYSICAL APPEARANCE, PKU – ENZYME ABNORMALITY
HEREDITY,ENVIRONMENT,AND EVOLUTION WORK TOGETHER
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