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Brain parts and functions are emphasized in a user friendly fashion. This posting also highlights the four major regions of the brain. A scenario is also included for analysis.

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Brain Response of Behavior

Part I - The brain works by using electrochemical transmission... the "chemical" aspect is a neurotransmitter (NT) which sends a signal from the presynaptic terminal to the receptors on the postsynaptic terminal. This is the beginning of the "electrical" aspect, an action potential.
NT's are the main method of information transfer from neuron to neuron in the brain. Physically, they are small chemical molecules that act as a key. These keys fit into a specific lock, the receptor. Each NT has its own specific set of receptors, usually there are several subtypes which creates diversity of action and complexity of behavior. So NT's are the signal from neuron to neuron. The beginning of this signal process is a sensory input (vision, touch, etc...). This causes a sensory neuron to create an action potential, the action potential acts to release NT's, NT's cross the synapse and interact with their receptors, these receptors take the chemical ...

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Besides the four major regions of the brain, this posting also explains overall brain parts and functions.

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Techniques for Mapping and Exploring Brain Function

To further understand the different lobes of the cerebral cortex as well as the various neuroimaging techniques such as the fMRI that are available for mapping and exploring brain function, consider the following two case studies:

1. Over the last few weeks, Mr. Roberts has been bothered by nausea, frequent fainting spells, and severe headaches. Describe at least two different ways such as neuroimaging techniques for example, which a physician might seek to determine whether Mr. Roberts' symptoms are a result of brain injury or disorder. Include a rationale for the choice of techniques.

2. After a mild stroke, Mrs. Smith has been showing signs of aphasia. What pattern of symptoms would lead you to believe the damage occurred primarily in (a) Wernicke's area (b) Broca's area?

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