Retaining Information 4. Describe the limited nature of sensory and short-term memory. Information first enters the memory system through the senses. Iconic memory is a momentary sensory memory of visual stimuli, a photographic or picture-image memory lasting less than a second. Echoic memory is a momentary sensory memory of auditory stimuli. Even if attention is elsewhere, sounds and words can still be recalled within 3 or 4 seconds. 1. Describe the capacity and duration of long-term memory, and discuss the biological changes that may underlie memory formation and storage. While we know that our capacity for storing information permanently is essentially unlimited, we are not sure how and where we store it. The search for the physical basis of memory has recently focused on the synapses and their neurotransmitters and on the long-term potentiation (LTP) of brain circuits, such as those running through the hippocampus. In response to increased activity in neural pathways, neural interconnections form or strengthen. Studies of the sea snail indicate
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This note was uploaded on 12/04/2011 for the course PSY 2012 taught by Professor Scheff during the Fall '08 term at Broward College.