BISC 320 Lecture Notes - Lecture 8: Motor Neuron, Diffusion Mri, Brain Damage
29 Mar 2017
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Neural plasticity, changes in neural pathways or connections between neurons, synaptic plasticity: ability to change the strength of an existing synapse b. i. Intrinsic plasticity: changes in the strength of a synapse that are brought about by its own activity b. ii. Extrinsic plasticity: changes in the strength of a synapse that are brought about by the activity in another pathway b. iii. Synaptic pruning: removal of existing synapses: ex of a simple neural pathway: the startle response circuit of the cockroach c. i. Sensory input from touch receptors send action potentials to integrating interneurons in the nervous system, which send messages to motor neurons, which in turn send messages to effectors, such as muscle cells, causing muscle contractions c. ii. He chose them because their nervous system is relatively simple and every neuron and neural circuit had already been mapped out d. ii. Habituation: decrease in intensity of a response with repeated exposure to an innocuous or uninformative stimulus d. ii. 2.
