a. Intracellular unit recording – technique where a microelectrode is placed inside a cell to register membrane potential as a neuron fires.
b. Extracellular unit recording – technique where a microelectrode is planted in the fluid next to a neuron to measure electrical activity coming from the firing of a neuron next to it.
c. Multiple unit recording – method where a small electrode is used to record the electrical activity of many nearby neurons.
d. Invasive EEG recording – method where intracranial electrodes are placed surgically and used to measure general changes in electrical activity in the brain.

2. Describe and compare these three techniques commonly used for obtaining information about the living human brain: fMRI, EEG and CT.

CT (Computed Tomography) – A computerized tomography scan of the head which is a …show more content…
Its technology uses a powerful magnet to measure changes in the distribution of oxygenated blood during and after the subject performs certain tasks.

EGG (Electroencephalography) - The electroencephalogram is a procedure that monitors and records brainwaves. Electrodes, are placed on the patient’s scalp and signals are sent to a computer to record the results. The normal electrical activity of the brain forms a recognizable pattern. Doctors use this technique to look for abnormal patterns that indicate seizures or other problems.

3. Which structures comprise the limbic system? What are the motivated behaviors that the limbic system is responsible for regulating?
The limbic system is formed by several brain structures that manage physiological responses to emotional stimuli. It consists of the fornix, amygdala, hippocampus, cingulate cortex, septum and mammillary body. The limbic system is related to the regulation of behaviors such as feeding, fighting, fleeing and sexual