The Brain

Accidents Phineas Gage Story Personality changed after the accident. What does this tell us? How can biology effect a persons behavior? http://www.learner.org/resources/series142.html?pop=yes&pid=1592 Choose #25

Electroencephalogram EEG Detects brain waves through their electrical output. Used mainly in sleep research.

Computerized Axial Tomography CAT Scan CAT(3 Words) 3D X-Ray of the brain. Good for tumor locating, but tells us nothing about function.

Magnetic Resonance Imaging MRI More detailed picture of brain using a magnetic field to knock electrons off axis. Takes many still pictures and turns images into a movie like production. Let’s play MRI game: http://www.nobelprize.or g/educational/medicine/ mri/game/index.html

Positron Emission Tomography PET Scan Measures how much of a chemical the brain is using (usually glucose consumption).

Cerebral Cortex (part or forebrain) Brain Structures: Hindbrain Midbrain Forebrain Cerebral Cortex (part or forebrain)

Brain Structures: Hindbrain: Medulla Oblongata Located just above the spinal cord. Involved in control of blood pressure heart rate breathing.

Brain Structures: Hindbrain: Cerebellum Controls our balance and fine movement skills

Brain Structures: Midbrain Coordinates simple movements with sensory information. Most important structure in Midbrain is the Reticular Formation: controls arousal and ability to focus our attention.

Brain Structures: Forebrain What makes us human. Largest part of the brain. Made up of the Thalamus, Limbic System and Cerebral Cortex.

Brain Structures: Forebrain Thalamus Receives sensory signals from the spinal cord and sends them to other parts of the forebrain.

Brain Structures: Forebrain Hypothalamas Maybe most important structure in the brain. Controls and regulates Body temperature Sexual Arousal Hunger Thirst Endocrine System http://www.learner.org/resources/series142.html?pop=yes&pid=1593 #24

Brain Structures: Forebrain Hippocampus Involved in the processing and storage of memories.

Brain Structures: Forebrain Amygldala More involved in volatile emotions like anger.

Brain Structures: The Cerebral Cortex Made up of densely packed neurons we call “gray matter” Glial Cells: support brain cells. Wrinkles are called fissures. If you lay brain out it would be as big as a large Pizza 2000 pizza.

The Cerebral Cortex is made up of four Lobes. http://www.google.com/imgres?q=lobes+on+a+brain&hl=en&safe=active&sa=X&qscrl=1&nord=1&rlz=1T4ADFA_enUS393US394&tbm=isch&prmd=ivns&tbnid=0qxi4Ttyo_YpyM:&imgrefurl=http://www.nlm.nih.gov/medlineplus/ency/imagepages/9549.htm&docid=ESrZP3QshA45NM&w=400&h=320&ei=kNw-TuyMK8ODsgKvz4kF&zoom=1&iact=hc&vpx=322&vpy=79&dur=2609&hovh=201&hovw=251&tx=156&ty=98&page=1&tbnh=120&tbnw=150&start=0&ndsp=9&ved=1t:429,r:1,s:0&biw=792&bih=528

Frontal Lobe Abstract thought and emotional control.

Frontal Lobe The Broca and Wernick Wernick-Decodes speech Broca-Commands speech http://www.learner.org/resources/series142.html?pop=yes&pid=1574

Temporal Lobe Process sound sensed by our ears.

Parietal Lobe Contain Sensory Cortex: receives incoming touch sensations from rest of the body.

Occipital Lobe Deals with vision. Contains Visual Cortex: interprets messages from our eyes into images we can understand.

Hemispheres Left Right logic sequential tasks. spatial creative tasks. Left Right

The Corpus Callosum Connects the 2 hemispheres. What happens if two hemispheres are split?

The Man with 2 Brains http://www.youtube.com/watch?v=lfGwsAdS9Dc