1. Today is a great day to learn about your BRAIN!!!

2. Human Brain

3. How do we know about the brain? EEG- electrical activity of brain CAT- 3D images MRI- image of radio waves/ Hydrogen atom energy PET- visual image of trace chemical activity after injection of radioactive substance

4. EEG

5. EEG

6. CAT

7. CAT

8. MRI

9. MRI

10. PET

11. PET

12. PET

13. Parts of the Brain

14. Cerebral Cortex The body’s ultimate control and information processing center Covers the brain’s lower level structures Contains an estimated 30 billion nerve cells Divided into four lobes

19. Frontal Lobes The portion of the cerebral cortex lying just behind the forehead Is involved in making plans and judgments

21. Occipital Lobe The primary visual processing area Located in the back of the head

23. Parietal Lobes Regions available for general processing, including mathematical reasoning Designated as the association lobes Behind the frontal lobes Processes taste, smell, and feeling Motion – motor cortex

25. Frontal Lobes The portion of the cerebral cortex lying just behind the forehead Is involved in making plans and judgments

26. Motor Cortex Area at the rear of the frontal lobes Controls voluntary movement Different parts of the cortex control different parts of the body. The motor cortex in the left hemisphere controls the right side of the body and visa versa.

29. Somatosensory Cortex Located in the front of the parietal lobes Registers and processes body senses Soma is Greek for “body.”

32. Parietal Lobes Regions available for general processing, including mathematical reasoning Designated as the association lobes Behind the frontal lobes

34. Temporal Lobes Includes the auditory cortex where sound information is processed Located roughly above the ears

37. Cerebellum Latin for the “little brain” Located in the rear of the brain Helps coordinate voluntary movements and balance If damaged, the person could perform basic movements but would lose fine coordination skills.

39. Cerebrum Longest part of brain Two hemispheres Responsible for voluntary movement, speech, emotion, memory intelligence and memory processing

41. Brainstem The oldest part of the brain Is responsible for automatic survival functions Located where the spinal cord swells and the brain just begins

43. Midbrain The MIDBRAIN is also responsible for behaviors associated with hearing and sight Pupil dilation and eyeball movement

45. PONS The PONS is responsible for helping to regulate breathing, to help with sleep and wake cycles, and controls facial expressions

47. Medulla The base of the brainstem Controls life-supporting functions like heartbeat and breathing Damage to this area can lead to death.

49. Limbic System A ring of structures around the thalamus; at the border of the brainstem and cerebral cortex Helps regulate memory, aggression, fear, hunger, and thirst Includes the hypothalamus, hippocampus, and amygdala

50. Thalamus Sits atop the brainstem The brain’s sensory switchboard -- directs messages to the sensory receiving areas in the cortex Thalamus is Greek for “inner chamber.”

52. Hypothalamus Located directly under the front of the thalamus Regulates eating, drinking, body temperature, and the fight or flight reactions to stress Plays a role in emotions, pleasure, and sexual function

56. Limbic System A ring of structures around the thalamus; at the border of the brainstem and cerebral cortex Helps regulate memory, aggression, fear, hunger, and thirst Includes the hypothalamus, hippocampus, and amygdala

57. Hypothalamus Located directly under the front of the thalamus Regulates eating, drinking, body temperature, and the fight or flight reactions to stress Plays a role in emotions, pleasure, and sexual function

59. Hippocampus Wraps around the back of the thalamus Plays a role in processing new memories for permanent storage Looks something like a seahorse –Hippo is Greek for “horse.”

61. Amygdala Two almond shaped structures Controls emotional responses such as fear and anger

63. Hemispheric Differences Module 8: The Brain

64. Hemispheric Differences “Left-brained” and “right-brained” debunked Brain is divided into two hemispheres but works as a single entity. Both sides continually communicate via the corpus callosum, except in those with split brains.

65. Hemispheric Differences: Language and Spatial Abilities Module 8: The Brain

66. The Brain’s Left Hemisphere For most people, language functions are in the left hemisphere. For a small percentage of people, language functions are in the right hemisphere.

67. Broca’s Area Located in the frontal lobe and usually in the left hemisphere Responsible for the muscle movements of speech If damaged the person can form the ideas but cannot express them as speech

68. PET Scan of Broca’s Area

70. Wernicke’s Area Located in the temporal lobe Involved in language comprehension and expression; our ability to understand what is said to us Usually in the left temporal lobe

72. PET Scan of Wernicke’s Area

73. The Brain’s Right Hemisphere Houses the brain’s spatial abilities Our spatial ability allows us to perceive or organize things in a given space, judge distance, etc. Helps in making connections between words

74. Brain Plasticity Module 8: The Brain

75. 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

76. Let’s look at the brain another way Let’s look at the brain another way

77. 3 main parts of the Brain 1.Hindbrain 2.Midbrain 3.Forebrain

78. There are three main parts in a human brain: 1 st : The Hindbrain It controls basic life functions

79. The Hindbrain 1) Medulla: blood pressure, heart rate, breathing

80. 2) Pons: Connects hindbrain w/ midbrain & forebrain = facial expressions

81. 3) Brainstem beginning where the spinal cord swells as it enters the skull responsible for automatic survival functions

82. 4) Reticular Formation in the brainstem important role in controlling arousal

83. 5) Cerebellum Reflexes balance sequential movement

84. 2 nd Midbrain: It controls sensory info

85. 3 rd Forebrain Thought and Reason

86. 1) Thalamus central relay station for incoming and outgoing messages (sensations)

87. 2) Hypothalamus regulates basic needs & emotions Food, water, sex for survival of species

88. 3) Amygdala Aggression & Anger Emotional Memories

89. 4) Hippocampus Formation of New Memories

90. 5) Cerebral Cortex Thought. Outer surface of 2 Cerebral Hemispheres-

91. 6) Cerebral Hemispheres- Left- names, complicated math, speaking Right- faces, basic functions, drawing

92. 7) Divided into Four Lobes –A) Occipital Lobe: –Receives visual info »Primary Visual Cortex: process visual info

93. B) Temporal Lobe: receives Hearing info & Balance »Primary Auditory Cortex: process auditory info

94. C) Parietal Lobe: Receives Sensory info »Primary Somatosensory Cortex: process sensory info

95. D) Frontal Lobe: receives Voluntary movement, attention information »Primary Motor Cortex: process voluntary movement info

96. 8) Corpus Callosum Nerves that hold hemispheres together, and transfer info from left/right

98. Corpus callosum

99. Language in the Brain (Left Hem) Broca’s area Speaking Wernicke’s area understanding

101. The End