PSYC 1000 Lecture Notes - Lecture 3: Psych, Myelin, Artificial Neural Network
15 Oct 2014
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*neuron signals do not travel like our electronics. It doesn"t matter how long the signal has to travel, it won"t lose strength* *multiple sclerosis is a disease where the myelin sheath cells start to deteriorate* K and na ions are involved, creating a charge difference. The nervous system: includes the central (brain) and peripheral systems (nerves). The peripheral system sends signals to the central system. It is responsible for automatic functions such as blood flow. It sends signals through spinal cords to activate movement. Autonomic system, sympathetic system and parasympathetic systems: sympathetic system prepares you for fight of flight. Gets your body is a state of readiness such as dilating the pupil, accelerates heartbeat, etc: parasympathetic system gets your body in a state of rest and relaxation. Central nervous system: includes the brain and spinal cord. The brain is a web of neural networks.
