Biological-Psychology.ppt

,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,ET,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,WHS AP Psychology,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,*,WHS AP Psychology,Unit 3:Biological Psychology,Essential Task 3-5a,.Describe the subdivisions and functions of the Central Nervous System,A.Brain,i.Brain Stem,Medulla,Pons,Reticular Formation,Cerebellum,and the Thalamus,ii.Limbic System,Hypothalamus,Amygdala,and the Hippocampus,iii.Cerebral Cortex(Left and Right Hemispheres and the corpus callosum),Occipital Lobe,Parietal Lobe,Temporal Lobe,and the Frontal Lobe,Primary Motor Cortex and Primary Sensory Cortex,Wernickes Area and Brocas Area,B.Spinal Cord,We are here,Nervous System,Central Nervous System,Brain,Brain Imaging,Peripheral Nervous System,Building Blocks,Genetics,Evolutionary,Endocrine System,Neurotransmitters,Somatic,Autonomic,Sympathetic,Parasympathetic,Biological Psychology,Spinal Cord,Neurons,Sensory,Motor,Essential Task 3-5:CNS,A.Brain,i.Brain Stem,Medulla,Pons,Reticular Formation,Cerebellum,and the Thalamus,ii.Limbic System,Hypothalamus,Amygdala,and the Hippocampus,iii.Cerebral Cortex,(Left and Right Hemispheres and the corpus callosum),Occipital Lobe,Parietal Lobe,Temporal Lobe,and the Frontal Lobe Primary Motor Cortex and Primary Sensory CortexWernickes Area and Brocas Area,B.Spinal Cord,Outline,6,Older Brain Structures,The,Brainstem,is,the oldest part of the brain,beginning where the spinal cord swells and enters the skull.It is responsible for automatic survival functions.,7,Brain Stem,The,Medulla muh-DUL-uh,is the base of the brainstem,It controls,autonomic,functions and relays nerve signals between the,brain,and,spinal cord,.,respiration,blood pressure,heart rate,reflex arcs,vomiting,8,Brain Stem,Pons and inside that the(Reticular Formation),is,a nerve network in the brainstem that plays an important role in controlling arousal.,It is involved in motor control and sensory analysis.for example,information from the ear first enters the brain in the pons.It has parts that are important for the level of consciousness and for sleep.,The Reticular Formation controls:,Attention,Cardiac Reflexes,Motor Functions,Regulates Awareness,Relays Nerve Signals to the,Cerebral Cortex,Sleep,10,Brain Stem,The,Thalamus THAL-uh-muss,is the brains sensory switchboard,located on top of the brainstem.It directs messages to the sensory areas in the cortex and transmits replies to the cerebellum and medulla.,11,The“little brain”attached to the rear of the brainstem.It helps coordinate voluntary movements and balance.,Cerebellum,13,The,Limbic System,is,a doughnut-shaped system of neural structures at the border of the brainstem and cerebrum,associated with emotions such as fear,aggression and drives for food and sex.It includes the hippocampus,amygdala,and hypothalamus.,The Limbic System,15,Hypothalamus,The,Hypothalamus,lies below(,hypo,)the thalamus.It directs several maintenance activities like eating,drinking,body temperature,and control of emotions.It helps govern the endocrine system via the pituitary gland.,16,Rats cross an electrified grid for self-stimulation when electrodes are placed in the reward(hypothalamus)center(top picture).When the limbic system is manipulated,a rat will navigate fields or climb up a tree(bottom picture).,Reward Center,Sanjiv Talwar,SUNY Downstate,18,The Cerebral Cortex,The intricate fabric of interconnected neural cells that covers the cerebral hemispheres.It is the bodys ultimate control and information processing center.,Structure of the Cortex,Each brain hemisphere is divided into four lobes that are separated by prominent fissures.These lobes are the,frontal lobe,(forehead),parietal lobe,(top to rear head),occipital lobe,(back head)and,temporal lobe,(side of head).,20,Functions of the Cortex,The,Motor Cortex,is the area at the rear of the frontal lobes that control voluntary movements.The,Sensory Cortex,(parietal cortex)receives information from skin surface and sense organs.,Visual Function,The functional MRI scan shows the visual cortex is active as the subject looks at faces.,Auditory Function,The functional MRI scan shows the auditory cortex is active in patients who hallucinate.,Language,Aphasia,is an impairment of language,usually caused by left hemisphere damage either to,Brocas area,(impaired speaking)or to,Wernickes area,(impaired understanding).,25,Specialization&Integration,Brain activity when hearing,seeing,and speaking words,Can you make a purple circle with a cross in the middle?,28,Our Divided Brain,Our brain is divided into two hemispheres.,The left hemisphere processes reading,writing,speaking,mathematics,and comprehension skills.In the 1960s,it was termed as the dominant brain.,Hemispheric Specialization,Corpus Callosum,Fibers that connect the two hemispheres,Allow close communication between left and right hemisphere,Each hemisphere appears to specialize in certain functions,(See Worksheet),Hemispheric Specialization,People with intact brains also show left-right hemispheric differences in mental abilities.,A number of brain scan studies show normal individuals engage their right brain when completing a perceptual task and their left brain when carrying out a linguistic task.,Splitting the Brain,A procedure in which the two hemispheres of the brain are isolated by cutting the connecting fibers(mainly those of the corpus callosum)between them.,Corpus Callosum,33,Split Brain Patients,With the corpus callosum severed,objects(apple)presented in the right visual field can be named.Objects(pencil)in the left visual field cannot.,34,Divided Consciousness,The Spinal Cord,Complex cable of nerves that connects brain to rest of the body,Carries motor impulses from the brain to internal organs and muscles,Carries sensory information from extremities and internal organs to the brain,400,000 people a year in US either partial or complete paralysis.,The Spinal Cord,The spinal cord controls some protective reflex movements without any input from the brain,