a. Memory is that faculty which enables an individual to store and retrieve factual items (sensations, impressions, facts, and ideas). Memory is ultimately the result of the unceasing flow of sensory information into the CNS. These items are stored in the CNS; just exactly how and where is the subject of much research and discussion. All sensory inputs are collated against these stored items in order to arrive at an appropriate action decision. (Often, no action is the most appropriate decision.)

b. At present, at least two types of memory are recognized in the human brain--short-term memory and long-term memory.

(1) Short-term memory. A common example of short-term memory is the ability to hold a phone number in mind for a number of seconds without "memorizing" it. Short-term memory is usually limited to about seven bits of information.

(2) Long-term memory. A portion of the cerebral cortex known as the hippocampus is thought to be important in transferring information from short-term memory to long-term memory. If the hippocampus is nonfunctional, the individual can learn nothing, but his previously long-term memory remains intact.

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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