Psychology 1000 Lecture Notes - Lecture 5: Myelin, Afferent Nerve Fiber, Reflex Arc

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

Problem: the first experiment may containment the second. Informed consent must be given in the experiment. The nervous system: descartes- reflex arc- stimuli transferred from periphery to brain and reflected back. Animal spirits - importance of pineal gland (center of the brain: swammerdam"s. Motor nerves = efferent fibers (got to effectors= muscle/gland) How does the brain distinguish stuff: speed of impulse. Muller 9000 ft/ min to 57 billion ft/ sec. Helmholtz- 50-100 meters /second (he"s right: reaction time. Dendrites- branches off cell body, takes information in (100"s) Axon terminals- transmitter (sends information out) (synaptic knobs) Those that have it transmit faster than those that don"t. Bipolar- two poles with cell body in the middle. Classify by function: sensory neurons afferent, motor neuron efferent, inter neurons relay stations. If a neuron depolarizes in threshold sodium rushes (holes expand) in and mv increases and goes above 0 and can go up until +40 mv.