ANATOMY
Lecture 1-12-99
Aristotle – “A change in the state of the soul results in a change in the state of the body and a change in the state of the body results in a change in the state of the soul.”
Science is the systematic observation of natural events for the purpose of determining the cause of natural events.
Classification of Man:
Homo sapiens means “man the intelligent”
Man is of the Phylum chordata. We have a notochord ( =flexible rod of tissue ) nucleus propulsus and a dorsal hollow nerve tube that contains the brain and spinal chord. Man also at one time had pharyngeal pouches, the remnants of which are the Eustachian tubes.
Man belongs in the Class Mammalia, characterized by hair, mammary glands, 3 auditory ossicles, teeth, diaphragm, and an 4 chambered heart.
Man is of the Order Primate, along with limas, monkeys, and the great apes.
The Family Hominidae is the family of man ( people ).
Medical terminology
Suffixes:
-dyne – pain
-oid – resembling
-penia – few, small
-trophy – nourishment
Prefixes:
Dys – painful
READ MEDICAL TERMS –SUFFIX, PREFIX, THEN WORD ROOT
Structural levels of the body:
Atoms and molecules
Cellular level – 60-100 trillion cells / body
Tissue level – epithelial, connective, muscle, nervous tissue – layers of cells of common function.
Organ level – 2 or more organs that perform common function
System level – 2 or more organs that perform common function, integumentary, endocrine, CV, Urinary…
Planes of reference
Sagittal
Frontal
Transverse
Longitudinal – parallel to long axis
Directional terms
Rostral – toward the nose
Body regions
Head
Neck
Trunk
Thorax
Abdomen ( regions and quadrants )
Pelvic region – pubic, perineum, lumbar, sacral, gluteal.
Upper extremity – shoulder, brachium, cubital, antebrachium, carpus, Manus
Lower extremity – hip, thigh, patellar, popliteal, crural region( leg ), pes
Body membranes
Mucous membranes line body cavities open to the exterior.
Serous membranes line body cavities NOT open to the exterior.
1-14-99
Terms for the day:
-oma – denoting a tumor or neoplasm
iatrogenic - denoting an unfavorable response to medical or surgical treatment, induced by the treatment itself
dysplasia – abnormal tissue develoment
hyperplasia – quantitative hypertrophy;an increase in number of cells in a tissue or organ, excluding tumor formation, whereby the bulk of the part or organ may be increased. See also hypertrophy.
hypertrophy – general increase in bulk of a part or organ, not due to tumor formation.
cyanosis – A dark bluish or purplish coloration of the skin and mucous membrane due to deficient oxygenation of the blood
etiology – The science and study of the causes of disease and their mode of operation.
idiopathic – denoting a primary disease of unknown cause
prognosis – A forecast of the probable course and/or outcome of a disease.
neuropathy - A classical term for any disorder affecting any segment of the nervous system
Terms related to movement of the body
1. Flexion - decrease in joint angle, if thigh or shoulder it means bringing it anteriorly
a. lateral flexion - bending of a joint, decrease of a joint angle
2. Extension - increase in joint angle
In anatomic position most joints are in extension
3. Abduction - away from the main axis
4. Adduction - toward the main axis
5. Rotation - movement of a body part around its own axis
a) medial rotation - internal rotation
b) lateral rotation - external rotation
c) supination of the forearm – anatomical position
d) pronation - rotation of the forearm so that the palm is rotated in a medial and posterior direction
or rotation of the radius on the ulna
6. Circumduction - circular movement of a body part
7. Inversion of the foot - ( sometimes called supination ) turning the sole of the foot inward
8. Eversion of the foot – ( sometimes called eversion ) turning the sole of the foot outward/laterally
9. Protraction - movement of the body part anteriorly
10. Retraction - movement of the body part posteriorly
11. Elevation - movement which raises a body part
12. Depression - lowering of a body part
Select topics relating to anatomy
1. Homeostasis - equilibrium - balance within the body. Disease results from a disruption of homeostasis
2. Fluids of the body
a) Extracellular fluids
1) plasma
2) interstitial fluid - intercellular fluid
3) synovial fluid
4) cerebrospinal fluid
b) Intracellular fluids
1) cytoplasm - cytosol
2) nucleus – nucleoplasm
There is a constant exchange between extracellular and intracellular fluids in the body.
3. Stress - reactions to disturbance in homeostasis, things that disturb the homeostasis of the body.
4. Disease - inappropriate response to stress, the body’s inappropriate response to stress
a) Signs - objective evaluation made by a trained person
b) Symptoms – subjective: “I don’t feel good”
c) Etiology - cause of disease, cause of disease
d) Diagnosis
Diagnosis
S – subjective – complaint of the patient
O – objective – clinical findings
A – assessment – put it all together
P – plan – what to do given the above information
D – degenerative
A – anomalies or auto-immune
M – metabolic
N – Neoplasm
I – infectious
T – trauma or toxic
Eponyms, pros and cons – an eponym is the use of a person’s name to describe anything scientific, it doesn’t tell you anything!
Different Approaches to the Healing Arts
Allopathic Medicine - create conditions antagonistic to the causative factor
Homeopathic Medicine - like treats like, medicines which evoke similar symptoms ( eg. Extract of jalapeno to treat hemorrhoids.)
Chiropractic - maintain neurological and musculoskeletal balance
Medicine - treatment and prevention of disease using nonsurgical means
The Metric System
Deciliter = 100 ml
mg% = mg/100ml
1 cup = 8 oz. = 1/2 pint
1 meter = 100 centimeters = 1000 mm = 3.28 ft.
1 grain = 64.8 mg.
Organization of the skeletal system
The Axial Skeleton
Skull – cranial and facial bones
Auditory ossicles – 3 bones total per side
Hyoid bone – below the larynx
Vertebral column – 26 bones in the adult
Rib cage/sternum -
The Appendicular Skeleton
Pectoral Girdle - scapula & clavicles - cingulum membri superioris - girdle - articulates with sternum & vertebral column
Upper Extremities - humerus, radius, ulna, carpal bones, metacarpals and phalanges
Pelvic Girdle - 2 ossa coxae, cingulum membri inferioris - articulates with sacrum
Lower Extremities - femur, tibia, fibula, tarsal bones, metatarsals and phalanges
Functions of the skeletal system
Support – it is an internal rigid framework to our structure
Protection – of internal organs
Body movement – levers for muscles to pull against
Provide an anchoring point of muscles
Calcium/phosphorus storage and metabolism
Hematopoiesis
Terminology
Condyle – a large rounded projection or a knob usually on the end of a long bone. Provides smooth articulation point
Facet – a flattened or shallow articulating surface – ribs, vertebrae
Head – a prominent rounded articulating bone end
Alveolus – deep pit or a socket – teeth
Foramen – a hole or rounded opening
Fissure – a narrow, slit-like opening
Sinus – a cavity or a hollow space in a bone
Sulcus – a groove
Crest – a narrow, ridgelike projection
Epicondyle – a projection located superior to a condyle
Process – any bony protuberance
Spine – a sharp, slender process – scapula
Trochanter – a massive, big process, only on the femur: greater, lesser, and gluteal tuberosity
Tubercle – a small rounded process
Tuberosity – a small roughened process
Fossa – a flattened or shallow surface, depression
Shapes of bones
Long bones – are longer than wide – femur
Short bones – somewhat cube shaped – wrist
Flat bones – cranial bones, ribs, scapula
Irregular bones – vertebrae and certain bones of the skull
Accessory bones – extra bones
Wormian bones – after Olas W. – sutural bones in the skull, extra bones
Structure of a typical long bone
Shaft – diaphysis – long tubular
periosteum – dense regular CT
Sharpey’s fibers – perforating fibers that connect periosteum to bone
Epiphysis – spongy bone on each end of the diaphysis
Epiphyseal plate – the growth center of the bone, covered with hyaline cartilage
Articular cartilage – hyaline cartilage
Red marrow – hematopoiesis/hemopoiesis
Medullary cavity – a central cavity within the diaphysis
endosteum – lines the medullary cavity
yellow marrow – fills it
Bone cells
Osteogenic cells – in periosteum and endosteum, osteoblasts or osteoclasts
Osteoblasts – lay down the osteoid, make bone
Osteocytes – mature bone cells, reside in the lacunae, regulate calcium release into the blood stream maintain bone
Osteoclasts – break down bone
Bone lining cells – derived from osteoblasts along the surface of most bones, regulate Ca/P movement
Spongy and Compact Bone
Spongy bone – lacy network of trabeculae (= supporting bundles of fibers), located deep to compact bone
Compact bone – very dense, forms external portion of bone composed of cylindrical columns of bone.
Haversian system – osteon
lamellae – concentric rings of bone
central canal – contains artery, vein, and lymphatics
lacunae – spaces where osteocytes reside
canaliculi – small channels which connect lacunae
perforating channels – Volkmann’s canal
Bone Growth
Endochondral ossification – long bones, etc. preexisting, most bone is made like this
Intramembranous ossification – flat bones, within a membrane
Homeostasis and Physiologic function of bone
Hematopoiesis – in the bone marrow, RBCs, WBCs, Platelets (thrombocytes)
Calcium storage and release
Function of calcium in the body
blood clotting
nerve transmission
muscle contraction
Control of calcium levels in the blood
bone
kidney
parathyroid glands
diet/GIT Disorders of calcium metabolism
hypocalcemia – tetany, spasm/seizures of muscles
pH is proportional to HCO3/CO2 ( story about his wife in labor- hypocalcemic – paperbag over her mouth )
hypercalcemia
Essential nutrients for normal bone development and function
Calcium, phosphorus, magnesium
Vitamin D – absorption of calcium
Vitamin A – osteoblast function
Vitamin C – necessary for osteoid synthesis
Protein
The Axial Skeleton
Skull
Divisions of the skull
Cranial bones – 8 bones in all
Cranial cavity – where the brain is
Calvaria – roof of the cranial vault
Cranial fossa – floor of the cranial cavity
Facial bones – 14 bones are not in contact with the brain. All are paired except the vomer and mandible
Fontanels – means literally fountain
Anterior fontanel – bregmatic fontanel closes by 18-24months bregma
Posterior or occipital fontanel – closes by 2 months lambda
Anterolateral or sphenoidal fontanel – closes by 3 months of age pterion ( 4 bones come together here )
Posterolateral or mastoid fontanel – closes by 12 months asterion
Sutures – means seam
Sagittal suture – separates parietal bones, bregma lambda
Coronal suture – anterolateral fontanel bregma anterolateral fontanel
Lambdoid suture – posterolateral to posterolateral fontanel, asterion to lambda
Squamous suture - anterolateral posterolateral fontanel, pterion asterion
Metopic suture – bregma intranasal sutures, anterior fontanel rostrally to glabella, closes by age 6
FORAMINA OF THE SKULL
Foramen Location Netters plate # Structures that pass through it
Carotid canal foramen Petrous temporal bone 7 Internal carotid artery
Internal carotid nerve plexus
Greater palatine foramen palatine bone 5 greater palatine nerve
Hypoglossal canal superior and anterolateral hypoglossal nerve XII to the occipital condyles 5, 7
Incisive foramen anterior region of palatine e nasopalatine nerve
process of maxilla 5
Inferior orbital fissure btwn maxilla & greater wing maxillary division of trigeminal nerve V2,
of sphenoid bone 2 zygomatic nerve
Infraorbital foramen inferior to the orbit 1 infraorbital nerve
Jugular foramen btwn the petrous portion of sigmoid sinus, Glossopharyngeal IX, temporal & occipital b. posterior Vagus X, to carotid canal 5, 7 Spinal accessory nerve XI
Foramen lacerum btwn petrous portion of the loop of the internal carotid artery -does not go thru
Temporal bone and sphenoid 5
Foramen magnum occipital bone 5, 7 spinal cord, vertebral arteries, spinal accessory nerve roots XI, meninges
Mandibular foramen medial surface of ramus of V3 inferior alveolar nerve ( once it goes thru here)
mandible 10
Mental foramen inferior to first molar on Inf. Alveolar mental nerve ( once it goes thru here) Lateral side of mandible 2
Nasolacrimal foramenbony canal lacrimal bone 44 nasolacrimal (tear) duct
Cribriform plate or cribriform plate of the ethmoid olfactory nerve I
Olfactory foramina bone 7
Optic canal sphenoid bone 7 optic nerve II
Foramen ovale sphenoid bone 5, 7 mandibular division of trigeminal nerve V3,
Foramen rotundum sphenoid bone 5, 7 maxillary division of the trigeminal nerve V2
Foramen spinosum sphenoid bone 5, 7 middle meningeal vessels ( a and v ),
Stylomastoid foramen btwn styloid and mastoid facial nerve VII
process of temporal bone 5
Superior orbital fissure btwn greater and lesser wings oculomotor III, trochlear IV, ophthalmic division of
of the sphenoid bone 1 trigeminal nerve V1, Abducens VI
Supraorbital notch (foramen) supraorbital arch of frontal b. 1 supraorbital nerve
Zygomaticofacial foramen anterolateral surface of the zygomaticofacial nerve
zygomatic bone 1
Internal acoustic meatus temporal bone 7 Facial VII, Vestibulocochlear VII (does not exit!)
1-19-99
Terms for the day
cytology - the study of the anatomy, physiology, pathology, and chemistry of the cell.
Fibrous tissue - a tissue composed of bundles of collagenous white fibers between which are rows of connective tissue cells; the tendons, ligaments
Erythro- - Combining forms meaning red or denoting relationship to redness
Chromo- - Combining form meaning color
Hyper- - Prefix denoting excessive or above the normal;
Hypo- - Prefix denoting deficient or below the normal;
Meta- - a prefix denoting the concept of after, subsequent to, behind, or hindmost; corresponds to L. post-.
Prefix denoting joint, action sharing.
Dia- - Prefix meaning through, throughout, completely
Dys- - Prefix meaning bad or difficult.
Genetic - Relating to 1) genetics; 2) ontogeny.
-coid – like
-osis – denotes primarily any production or increase, physiologic or pathologic, and secondarily an invasion, and increase within the organism, of parasites;
-plasia - Suffix meaning formation.
-stasis - Stagnation of the blood or other fluids.
Words of the day 1-26-99
Petechiae- minute hemorrhagic spots, of pinpoint to pinhead size, in the skin, which are not blanched by pressure.
Pallor , jaundice, rhinorrhea, vesicle, alopecia, hypoxia,
Cicatrix – scar
Hypercapnia – increased arterial CO2
Anodyne – compound less potent than a narcotic, but capable of relieving pain.
Ligaments of the Spine 1/26/99
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