4. Learning: Part 1. Lashley sought to find the engram, the physiological representation of learning. In physiological psychology terms, how would you recognize an engram if you saw one? That is, what would someone have to demonstrate before you could conclude that a particular change in the nervous system was really an engram? Part 2. Describe the role of the hippocampus in memory formation. Explain how memories are organized (i.e., the different types of memory) and stored in our brains. If a synapse had already developed LTP once, should it be easier or more difficult to get it to develop LTP again, explain? How is confabulation different from lying? How many different memories are there and how are they different? 5. Sex and Hormones: Part 1. Describe some of the evidence that genetic factors may influence sexual orientation. Part 2.Describe organizing and activating effects of sex hormones and give specific examples. Make sure to clearly demonstrate the difference between organizing and activating effects. 6. Corpus Callosum Facts: Part 1.When a person born without a corpus callosum moves the fingers of one hand, he or she is likely also to move the fingers of the other hand, involuntarily. What possible explanation can you suggest? Explain lateralized functions and give examples of two of those functions. Part 2. Most people with Broca's aphasia suffer from partial paralysis on the right side of the body. Most people with Wernicke's aphasia do not. Why? What is the relationship between language and communication? How can information be transferred between the hemispheres?