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The Brain

I. Lower-Level Structures. Brainstem, Thalamus, and Cerebellum. A. Brainstem. The oldest part of the brainResponsible for automatic survival functions. 1. Medulla. Controls heartbeat and breathingDamage to this area can lead to death.. 2. Reticular Formation. Controls alertnessDamage to this area can cause a coma..

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The Brain

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    1. The Brain Module 08

    2. I. Lower-Level Structures Brainstem, Thalamus, and Cerebellum

    3. A. Brainstem The oldest part of the brain Responsible for automatic survival functions

    4. 1. Medulla Controls heartbeat and breathing Damage to this area can lead to death.

    5. 2. Reticular Formation Controls alertness Damage to this area can cause a coma.

    6. B. Thalamus The brain’s sensory switchboard -- directs messages from sensory organs to the correct area of the brain

    7. C. Cerebellum Helps coordinate voluntary movements and balance Damage to this area can cause loss of fine motor skills Small yet controlled, skilled movements; such as writing or playing guitar

    8. II. Limbic System Helps regulate memory, aggression, fear, hunger, and thirst Includes Hypothalamus, Hippocampus, and Amygdala

    9. A. Hypothalamus Regulates eating, drinking, body temperature, libido, and the “fight or flight” reaction

    11. B. Hippocampus Part of the limbic system that helps us form new memories Looks like a seahorse Hippo is Greek for “horse.”

    13. C. Amygdala Controls emotional responses such as fear and anger Damage to this area could result in violent, aggressive behavior

    15. III. Cerebral Cortex Module 8: The Brain

    16. A. Corpus Callosum Connects the two brain hemispheres Is sometimes cut to prevent seizures

    17. B. The Four Lobes Frontal, Parietal, Occipital, and Temporal

    18. 1. Frontal Lobes Located just behind the forehead Involved in personality, making plans and judgments

    19. 2. Parietal Lobes Involved in making associations Located behind the frontal lobes

    20. 3. Occipital Lobes The primary visual processing area Located in the back of the head Damage to this area could result in loss of vision

    21. 4. Temporal Lobes Auditory (sound) information is first processed here Located above the ears

    23. Cerebral Cortex

    24. Cerebral Cortex

    25. Cerebral Cortex

    26. Cerebral Cortex

    28. IV. Hemispheric Differences Module 8: The Brain

    29. A. Left Hemisphere Spoken language is one of the clearest differences between the two hemispheres. For most people, language functions are in the left hemisphere.

    30. 1. Broca’s Area Located in the frontal lobe, usually in the left hemisphere Responsible for the muscle movements of speech Damage to this area causes problems in expressing thoughts in spoken language

    31. PET Scan of Broca’s Area

    33. Broca’s Area

    34. 2. Wernicke’s Area Located in the temporal lobe (usually on the left side) Gives us the ability to understand what is said to us

    36. PET Scan of Wernicke’s Area

    37. B. Right Hemisphere Spatial skills - being able to perceive or organize things in a given space, judge distance, etc. Relationships and emotions

    39. C. Plasticity The ability of the brain tissue to take on new functions Greatest in childhood Important if parts of the brain are damaged or destroyed

    40. V. Imaging Techniques CAT Scan: X-rays taken from different angles of the brain MRI: computer generated images of soft tissue in the brain EEG: electrodes on the scalp measure waves of electrical activity in the brain PET: a visual display of brain activity based on glucose (blood sugar)

    41. The End Any questions?

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