Western Medical Terminology lecture 1
History of Medical Language
Main Sources of Medical Terminology
Medical terms originate from various languages, predominantly Greek and Latin.
Greek terms: Used primarily in clinical terminology (e.g., Cardiology, Nephropathy, Gastritis).
Latin terms: Predominantly used in anatomical terminology (Nomina Anatomica) (e.g., cor, ren, ventriculus).
Other origins include:
French (e.g., massage, passage, plaque).
Italian (e.g., varicella, belladonna, influenza).
Statistical Overview
Approximately ¾ of medical terminology is derived from Greek.
The historical context:
Greeks are considered the founders of rational medicine; dominant theories from the 5th Century B.C. were defined by the Hippocratic School and later Galen (2nd century A.D.).
Greek Influence on Medical Terminology
The Hippocratic School first described diseases through observation.
Many terms introduced from this era still persist, such as:
Arthritis (inflammation of the joints)
Nephritis (inflammation of the kidneys)
Pleuritis (inflammation of the pleura).
Greek language suitability:
Facilitates the derivation of compound words (e.g., appendicitis, creatinine, cystoscope, epinephrine, streptococcus).
Serves as an international language for medical discourse.
Latin Influence on Medical Terminology
Greek medicine spread to Rome early, introducing many Latin terms into medical usage.
Latin was regarded as the language of science from the Christian era to the 18th century, with medical texts primarily in Latin.
Notable anatomical work: Andreas Vesalius, De humani corporis fabrica (1543) solidified Latin's dominance in anatomical terminology.
The Role of English in Medical Terminology
Modern developments: Most influential medical journals are now published in English.
English as the international standard has paralleled the historical dominance of Latin.
Current trend towards English-derived medical terms (e.g., bypass operation, clearance, screening).
Modern Pronunciation of Medical Terms
Pronunciation inconsistencies exist in modern English medical terms borrowed from Greek and Latin.
Current pronunciations tend to be approximative of classical articulations.
Categories of Medical Terms
Medical terms consist of Greek or Latin roots and elements, illustrated through the following:
Eponyms: Naming based on the physician's or scientist's name (e.g., Alzheimer's disease, Parkinson's disease).
Acronyms: Formed from initial letters, pronounced as a whole word, typically containing a vowel (e.g., LASER - Light Amplification by Stimulated Emission of Radiation).
Modern Language: Terms derived from English (e.g., nuclear medicine scanner).
Approaching Medical Language
Understanding medical jargon likened to playing with LEGOs:
Assemble complex structures with basic components.
Learn to connect and disconnect elements effectively.
Objectives in Studying Medical Terminology
Analyze terms by identifying component parts.
Develop skills to recognize and manipulate 'LEGO pieces' (elements of terms).
Create new terms using learned components.
Relate terminology to human body structure and functions:
Understanding terminological connections with physiological systems.
Recognize common pronunciation and spelling issues,
Example: ilium vs ileum (different meanings).
Anatomy of Medical Terms
Elements of a Medical Word
Comprised of:
Word Root: Foundation of meaning.
Combining Form: Base plus a combining vowel; enables word connection (e.g., gastr/o, cardi/o).
Suffix: Added end part altering the term's meaning (e.g., -itis for inflammation).
Prefix: Initial element altering the meaning (e.g., hyper- for excessive).
Word Roots in Medical Terms
Essential for understanding; every medical term includes at least one root.
Derived mainly from Greek or Latin:
Example: Greek dermatos and Latin cutane both refer to skin.
General rules:
Greek roots are for diseases, conditions, treatments.
Latin roots are for anatomical structures.
Combining Forms
Formed by combining a root with a vowel, typically an o or sometimes an i (e.g., gastr/o).
Acts as a basic foundation to which other elements are added.
Suffixes
Added to word roots or combining forms to modify meaning (e.g., -ectomy means surgical removal).
Example analysis:
tonsill/itis → tonsill (tonsil) + itis (inflammation).
tonsill/ectomy → tonsill (tonsil) + ectomy (removal).
Prefixes
Elements affixed to the start of words or roots,
Not mandatory in all medical terms.
Addition or change of a prefix alters the term's meaning (e.g., macrocyte (large cell) vs microcyte (small cell)).
Defining Medical Words
Methodology for breaking down a term such as gastroenteritis:
Suffix analysis: -itis (inflammation).
First part (prefix/root/combining form): gastr/o (stomach).
Middle part: enter (intestine).
Overall meaning: Inflammation of the stomach and intestine.
Building Medical Words
Rule #1: A root links to a suffix beginning with a vowel.
Rule #2: A combining form links to a suffix beginning with a consonant.
Rule #3: A combining form links one root to another root to form compound words.
Example: osteoarthritis (osteo + arthr + itis).
Types of Medical Suffixes
Surgical Suffixes: Indicate invasive procedures.
Diagnostic Suffixes: Denote tests/procedures to identify illnesses.
Pathological Suffixes: Describe disease conditions.
Commonly Used Suffixes
The significance of mastering major suffix categories for effective comprehension of medical terminology.
Plural Suffixes and Grammatical Variations
Singular/plural rules derived from Greek and Latin origins are important for accurately adapting medical terms.
Various English endings are also used in medical nomenclature.
Grammatical Suffixes
Attached to establish parts of speech: adjectives, nouns, or singular/plural forms.
Example: tubule—a diminutive form of tube.
Understanding Prefixes in Medical Terminology
Major types of prefixes include:
Position Prefixes: Indicate location.
Number/Measurement Prefixes: Clarify amount or degree.
Direction Prefixes: Describe a trajectory or route.
Substituting prefixes changes term meanings.
Body Structure
Levels of Organization
Various levels of structure from simplest to most complex:
Cell → Tissue → Organ → System → Organism.
Each structure supports the functions of the whole.
Cell Structure and Function
Cytology: Study of cells.
Cell: Basic unit performing life activities:
Utilizing nutrition, waste elimination, reproductive functions.
Consists of:
Cell membrane (protective barrier), cytoplasm (gel-like contents), and nucleus (genetic information center).
Nucleus Functions
Manages:
Metabolism, growth, reproduction.
Houses DNA (deoxyribonucleic acid) organized into chromatin and chromosomes.
Each cell (excluding sperm and egg) contains 46 chromosomes (23 pairs).
Tissues
Histology: The study of tissues, comprised of specialized cells.
Types of Tissue:
Epithelial: Covers organ surfaces (e.g., skin).
Connective: Supports and connects tissues/organs (e.g., blood, fat).
Muscle: Responsible for movement.
Nervous: Transmits electrical impulses.
Organs
Functionally specialized from at least two tissue types.
Example: Stomach consists of connective, muscle, epithelial, and nervous tissue working cohesively.
Systems
Organ systems group for complex functions (e.g., GI system includes esophagus, stomach, intestines).
Organism
The highest level of structure; a complete living entity with interdependent systems supporting life.
Anatomical Position and Directional Terms
Anatomical Position
Standardized reference position for anatomical studies.
Establishes consistent directional terms (e.g., superior, inferior).
Planes of the Body
Used for structural identification:
Midsagittal (median), Coronal (frontal), and Transverse (horizontal).
Clinical Use of Body Planes
Modern imaging techniques like MRI and CT scans allow for three-dimensional assessments of anatomical structures across multiple planes, overcoming limitations of traditional single-plane x-ray imagery.