a nerve cell; basic building block of the nervous system
branching extentions of a neuron that recieve messages and conduct impulses toward the cell body
a layer of fatty tissue segmentally encasing the fibers of many neurons; enables vastly greater transmission speed of neural impulses as the impulse hops from one node to the next.
a neural impulse; a brief electrical charge that travels down an axon.
the positive-outside\negative-inside state of the axon
a resting pause when the neuron pumps the positively charged sodium atoms back outside
the junction between the axon tip of the sendinig neuron and the dendrite or cell body of the recieving neuron.
a process when the sending neuron resbsorbs the excess neurotransmitter
neurotransmitter; movement, learning, attention, emotion
neuroransmitter; mood, hunger, sleep, arousal
neurotransmitter; alertness, arousal
symathetic nervous system
the division of the autonomic nervous system that arouses the body, mobilizing its energy in stressful situations
somatic nervous system
the division of the peripheral nervous system that controls the body's skeletal muscles.
autonomic nervous system
part of the peripheral nervous system that controls glands and the muscles of internal organs.
parasympathetic nervous system
division of the autonomic nervous system that calms the body, conserving its energy
chemical messengers, mostly manufactured by the endocrine gands
a system for regulating activities in the body by means of glandular secretions
an amplified recording of the waves of electrical activity that sweep across the brain's surface. measured by electrodes placed on scalp.
megnetic resonance imaging; a technique that uses magnetic fields and radio waves to produce computer generated images that distinguish different structures in the brain (tissues)
the brains sensory switchboard, located on top of the brain stem; directs messages to the sensory recieving areas in the cortex and transmits replies to the cerebellum and medulla.
lies below the thalamus, governs the endocrine system and helps direct several maitenance activities.
two almond shped structures neutral clusters that are components of the limbic system and are linked to emotion.
a neural center located in the limbic system that helps process explicit memories for storage.
portion of cerebral cortex that lies just behind the forehead. involved in speaking and muscle movements, and making plans and decisions
portion of cerebral cortex lying at the top of the head toward the rear that includes the sensory cortex
portion of cerebral cortex that lies at the back of the head; includes visual areas
portion of cerebral cortex lying roughly above the ears; includes auditory areas
controlls language expression, an area of the frontal lobe, usually in the left hemisphere, directs muscle movements involved in speech.
controlls language reception , brain area involved in language comprehension and expression
large band of neural fibers connecting the two brain hemispheres and carrying messages between them