L33 Psych 100B Lecture Notes - Lecture 3: Resting Potential, Autonomic Nervous System, Peripheral Nervous System
12 Dec 2018
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Parts of the nervous system: central nervous system, brain & spinal cord, peripheral nervous system, somatic nervous system (motor/sensory, autonomic nervous system (breathing, heart rate, within the autonomic nervous system, sympathetic nervous system (rest & digest, parasympathetic nervous. Neurons: the basic unit of the nervous system. Sensory (afferent) neurons send signals to the spinal cord. Motor (efferent) neurons receive messages from the spinal cord. Interneurons act within the spinal cord as a go between . Anatomy of neurons: cell body (nucleus, dendrite, axon, myelin sheath (glial cells, nodes of ranvier, terminal buttons. The myelin sheath transmits the signal much faster by passing over the nodes of. This is a graph of the membrane potential of a neuron, representing what happens when it is fired. First, there is a resting membrane potential, and then there is a sensory output, resulting in depolarization . This ends in the action potential, the tip of the potential for neurons.
