A neural impulse; a brief electrical charge that travels down the axon of a neuron.
Controls emotional responses, such as fear and anger.
The extension of a neuron through which neural impulses are sent.
The oldest part and central core of the brain; it begins where the spinal cord swells as it enters the skull and is responsible for automatic survival functions.
A brain area of the left frontal lobe that directs the muscle movements involved in speech.
The "little brain" attatched to the rear of the brainstem; it helps coordinate voluntary movements and balance.
The large band of neural tissue that connects the two brain hemispheres and allows them to communicate with each other.
CT or Cat Scan
A series of x-ray photographs taken from different angles and combined by computer into a composite representation of a slice through the body.
The branching extensions of a neuron that receive information and conduct impulses toward the cell body.
The portion of the cerebral cortex lying just behind the forehead that is involved in planning and judgement; it includes the motor cortex
A neural center located in the limbie system that wraps around the back of the thalamus; it helps process new memories for permanent storage.
A neural structure lying below the thalamus; it helps regulate many of the body's maintenetance activities, such as eating, drinking, and body temperatures, and is linked to emotion.
Located at the base of the brainstem, it controls basic life-support functionsnlike heartbeat and breathing.
A strip of brain tissue area at the rear of the frontal lobes that controls voluntary movements.
MRI (Magnetic Resonance Imaging)
A technique that use magnetic fields and radio waves to produce computer-generated images that distinguish among types of soft tissue; this allows us to see structures within the brain.
A nereve cell; the basic building block of the nervous system.
A chemical messenger that travels across the synapse from one neuron to the next and imfluences whether a neuron will generate an action potential.
The portion of the cerebral cortex lying at the back if the head; it includes the primary visual processing areas of the brain.
The portion of the cerebral cortex lying at the top of the head and toward the rear; it includes the somatosensory cortex and general association areas used for processing information.
The "recharging phase" during which a neuron, after firing, cannot generate another action potential.
The state of a neuron when it is at rest and capable of generating an action potential.
the area at the front of the parietal lobes that registers and processes body touch and movement sensations
Somatic Nervous System
The division of the peripheral nervous system that controls the body's skeletal muscles.
The tiny, fluid-fill gap between the axon terminal of one neuron and the dendrite of another.
The portion of the cerebral cortex lying roughly above the ears; it includes the auditory areas of the brain.
The brain's sensory switchboard, located on top of the brainstem; it directs messages to the sensory receiving areas in the cortex.
A brain area of the left temporal lobe involved in language comprehension and expression.