PSYB64H3 Lecture Notes - Lecture 9: Occipital Lobe, Caudate Nucleus, Cortisol
Document Summary
Increased neurotransmitter release by sensory neuron: classical conditioning in aplysia, sequential activation of sensory neurons by cs and ucs leads to greater neurotransmitter release. Major anatomical features involved w learned responses. Gill, head, siphon and tail are major areas. Many learned responses involve neurons in the abdominal ganglion. P9 is the largest nerve serving the tail. P9 is the largest & goes the furthest (simpler to work w and study the connections) Memory of event (shock) is a function of the number of trials you shock the aplysia. Normal situation sensory neuron releases normal amount of neurotransmitters. Habituation (ignoring) sensory neuron releases less neurotransmitters. Sensitization (heightened response/awareness) sensory neuron releases increased neurotransmitters to interneurons/motor neurons. Habituation reduces the number of terminals whereas sensitization increases the number. Classical conditioning in aplysia classical conditioning: making connection btn elements that were not normally connected. Water jet alone on mantle: withdrawal of gill learned that water jet was once paired w the shock.
