Presentation on theme: "The Brain. Made up of neurons 23 billion nerve cells and 300 trillion synapses Glial cells – My husband is my glial cell. He takes care of me!!! Whose."— Presentation transcript:
Made up of neurons 23 billion nerve cells and 300 trillion synapses Glial cells – My husband is my glial cell. He takes care of me!!! Whose yours?
Ways we Study the Brain
Accidents Phineas Gage Personality changed after the accident. What did this tell us? That different part of the brain control different aspects of who we are.
Lesions Frontal Lobotomy
Electroencephalogram EEG Detects brain waves through their electrical output. Used mainly in
Computerized Axial Tomography CAT Scan 3D X-Ray of the brain.
Magnetic Resonance Imaging MRI
Positron Emission Tomography PET Scan
Functional MRI Identifies most active areas of the brain during a specific mental task
Brain Structures Scientists divide the brain up into three parts.
Brain Stem Part of the brain with the oldest ancestry 5 Regions: – Medulla – Pons – Reticular formation – Thalamus – Cerebellum
Limbic System EMOTIONAL CONTROL CENTER of the brain. REWARD CENTER of the brain (hypothalamus) Located between the brainstem and cerebral hemispheres Made up of Hypothalamus, Amygdala and Hippocampus.
Areas of the Cerebral Cortex Divided into eight lobes, four in each hemisphere
Association Areas Locate in cerebral cortex Not directly involved in sensory and motor activity (sensory cortex, motor cortex, visual cortex or auditory cortex) Involved in higher mental functions such as Example:
Language Development Aphasia – Frontal Lobe – Broca’s Area – Temporal Lobe – Wernicke’s Area – Parietal Lobe – Angular Gyrus –
The Divided Brain Plasticity –. The younger you are, the more plastic your brain is. Contraint induced therapy - teaching a patient to regain the use of an impaired limb by limiting the use of the good limb Neurogenesis – What can you do to produce new neurons?
Hemispheres Brain Lateralization - divided into a left and right hemisphere. Contralateral controlled- left controls right side of body and vice versa. Left Brain – Right Brain –
Split-Brain Patients Sperry and Gazzaniga Corpus Callosum – connects two brain hemispheres and carries messages between them Removed in patients with severe epilepsy When removed you have a split-brain patient.
Figure 3B.23 Testing the divided brain When an experimenter flashes the word HEART across the visual field, a woman with a split brain However, if asked to indicate with her left hand what she saw,. From Gazzaniga, 1983
Figure 3B.25 Which one is happier? Look at the center of one face, then the other. Does one appear happier?
The Brain and Consciousness Consciousness – Dual Processing –