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Psychology (3,337)
PSYC 1000 (740)
Dan Meegan (212)

Module 5.docx

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PSYC 1000
Dan Meegan

Module 5: Tools of Discovery and Older Brain Structures The Tools of Discovery: Having Our Head Examined - Early clinical observation o Brain-mind connections o Damage on one side effects opposite side o Back of the brain disrupts vision o Left front produced speech difficulties  Gradually they were mapping the brain - Lesion o Tissue destruction o Naturally or experimentally caused destruction or brain tissue - Today’s neuroscientists stimulate various parts of the brain o Electronically, chemically, or magnetically o Able to detect a electrical pulse in a single neuron - Electrical activity in brain’s neurons sweep across in regular waves - Electroencephalogram o An amplified recording of the waves of electrical activity that sweep across the brain’s surface o Waves are measured by electrodes places on the scalp o Stimulus repeatedly and unrelated activity is filtered - PET positron emission tomography scan o Visual aid of brain activity that detects where radioactive from of glucose goes where the brain performs a given task o Hot spots show which brain areas are most active - MRI magnetic resonance imaging o A technique that uses magnetic fields and radio waves to produce computer generated images of soft tissue o Aligns spinning atoms of brain molecules o Show brain anatomy and functioning  Compare MRIs from a second apart to see where blood flow goes o New insight into how brain divides labour  Can see what’s most active when feeling pain or rejection ect…  Able to predict what the person’s mental activities were (80%) - fMRI (functional MRI) o a technique for revealing bloodflow and therefore brain activity by comparing successive MRI scans Older Brain Structures - Animals capacities come from brain structures o In simple brains  Regulates basic survival functions o Lower mammals  Enables emotion and greater memory o Advanced mammals  Processes more information, increased foresight The Brainstem - The oldest and central core of the brain o Beginning where the spinal cord swells as enters the skull - Medulla o The slight swelling o Controls heartbeat and breathing o Brain damaged patients in vegetative state still breathe and heart beats - Pons o Just above medulla o Coordinates movements - Is the crossover point o Nerves to and from each side of b
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