PSY 106 Chapter Notes - Chapter 4: Substantia Nigra, Extracellular Fluid, Resting Potential
Document Summary
Ch 4 - neural conduction and synaptic transmission. Parkinson"s disease - the lizard : appears much older than his actual age, rigid muscles, marked poverty of spontaneous movement, difficulty in starting to move, and slowness in executing voluntary movements once they have been initiated. Membrane potential - the difference in electrical charge between the inside and the outside of a call: record by positioning the tip of one electrode inside the neuron (intracellular electrode. = microelectrode) and the tip of another electrode outside the neuron in the extracellular fluid. In its resting state, a neuron is said to be polarized: more na+ and cl- ions are outside the neuron than inside, more k+ ions and negatively charged protein ions are inside the neuron than outside. In resting neurons, k+ and cl- ions pass readily through the neural membrane, na+ ions pass through it with difficulty, and the negatively charged protein ions do not pass through it at all.
