PSYC 212 Lecture Notes - Lecture 3: Efferent Nerve Fiber, Absolute Threshold, Myelin
13 Jul 2014
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September 8, 2011: psychology subject pool, http://mcgill-participantpool. sona-systems. com/ Weber"s law: difference threshold difference in intensity to detect the difference is proportional to the actual intensity of the stimuli. Fechner"s law: measured psychological reactions, used weber"s law to see how psychological reaction (sensation) changes based on the change in intensity, s=klogi (s sensation units, i stimulus units) Biological foundations of sensory perception (chapter 2: where is the mind, aristotle the heart (emotions cause change in heart beat) 4th century, galen spirits in the ventricles 2nd century, descartes pineal gland 1630s. The mind is not material: willis brain 1664, golgi golgi stained neuron 1870s, adrian single neuron recording 1920s, modern neuron networks interacting. Something simple that reacts (either on or off: functional specialization, phrenology. Different parts of the brain are used for different tasks: lateralization. Penfield found the place in the brain where stimulus caused the smell to stop the seizures: phineas gage working in 19th century for railways.
