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Chapter 6

Studying The Brain

TermDefinition
Central Nervous System (CNS) The brain and spinal cord
Spinal Cord Nerves that run up and down the length of the back and transmit most messages between the body and the brain
Peripheral Nervous System (PNS) Nerves branching out from the spinal cord
Neurons The long, thin cells of nerve tissue along which messages travel to and from the brain
Synapse The gap that exist between individual nerve cells
Neurotransmitters The chemicals released by neurons, which determine the rate at which neurons fire
Somatic Nervous System (SNS) The part of the peripheral nervous system that controls voluntary movement of the skeletal muscles
Autonomic Nervous System (ANS) The part of the peripheral nervous system that controls internal biological functions
Hindbrain A part of the brain located at the rear base of the skull that is involved in the basic process of life
Midbrain A small part of the brain above the pons that integrates sensory information and relays it upward
Forebrain A part of the brain that convers the brain's central core
Lobes The different regions into which the cerebral cortex is divided
Electroencephalograph (EEG) A machine used to record the electrical activity of large portions of the brain
Computerized Axial Tomography (CAT) An imaging technique used to study the brain to pinpoint injuries and brain deterioration
Positron Emission Tomography (PET) An imaging technique used to see which brain areas are being activated while performing task
Magnetic Resonance Imaging (MRI) An imaging technique used to study brain structure and activity
Endocrine System A chemical communication system, using hormones, by which messages are sent through the blood stream
Hormones Chemical substances that carry messages through the body in blood
Pituitary Gland The center of control of the endocrine system that secretes a large number of hormones
Heredity The genetic transmission of characteristics from parents to their offspring
Identical Twins Twins who come from one fertilized egg; twins having the same heredity
Genes The basic building blocks of heredity
Fraternal Twins Twins who come from two different eggs fertilized by two different sperm
Created by: hollha78