PSYC 1001 1st Edition Lecture 13 Outline of Last Lecture I. NeuronsII. Parts of a Neurons?III. What is the neural message?Outline of Current Lecture I. Axon Signala. Refractory Period Current LectureI. Axon Signala. Resting Potential: Is about 70 millivolts (millivolt= 1/1000 of a volt).b. Action Potential: Brief reversal in an axon’s electrical charge.i. Neural Messageii. Outside becomes negative and the inside becomes positive.iii. Excitation near axon opening/beginning causes channels to open. 1. Positive ions rush in a. Reverses the chargec. All or none transmission: Either an axon fired (sends an action potential) or it does not. i. No big or small action potentials, they are all the same size.1. Message is number of firings per second that are happening.ii. Speed1. From 2 mph to 200 mph2. 200: Mylenated axon (sped up axon)iii. Refractory Period: Brief period (1-2 milliseconds) after an action potentialduring which another action potential cannot occur. These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a
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