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Chapter 19: Key Terms
The Skeleton
126
Medical
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11/13/2011

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Term
acetabulum
Definition
Bony socket in the hip bone that holds the head of the femur
Term
articulation
Definition
A joint
Term
atlas
Definition
The first cervical vertebra
Term
axis
Definition
The second cervical vertebra
Term
bone
Definition
A calcified form of dense connective tissue, osseous tissue; also an individual unit of the skeleton
Term
bone marrow
Definition
Soft material that fills bone cavities
Term
bursa
Definition
Fluid-filled sac that reduces friction near a joint
Term
cartilage
Definition
A type of dense connective tissue found in the skeleton, larynx, trachea & bronchi. The precursor to most bone tissue.
Term
diarthrosis
Definition
A freely movable joint; aka synovial joint
Term
diaphysis
Definition
shaft of a long bone
Term
epiphyseal plate
Definition
The growth region of a long bone; located in the metaphysis, between the diaphysis and epiphysis. When bone growth ceases, this area appears as the epiphyseal line
Term
epiphysis
Definition
The irregularly shaped end of a long bone
Term
ilium
Definition
The large, flared, superior portion of the pelvic bone
Term
joint
Definition
The junction between two bones; articulation
Term
ligament
Definition
strong band of connective tissue that joins one bone to another
Term
metaphysis
Definition
region of a long bone between the diaphysis & epiphysis. The growing region of a long bone during development.
Term
ossification
Definition
formation of bone tissue
Term
osteoblast
Definition
cell that produces bone tissue
Term
osteoclast
Definition
cell that destroys bone tissue
Term
osteocyte
Definition
mature bone cell that nourishes and maintains bone tissue
Term
pelvis
Definition
Large ring of bone at the inferior trunk. Formed of the two hip bones joined to the sacrum and coccyx.
Term
periosteum
Definition
The fibrous membrane that covers a bone's surface
Term
resorption
Definition
Removal of bone by breakdown and absorption into the circulation
Term
skeleton
Definition
The body's bony framework, consisting of 206 bones
Term
suture
Definition
An immovable joint
Term
symphysis
Definition
slightly movable joint
Term
synovial fluid
Definition
fluid contained in a freely movable joint
Term
synovial joint
Definition
freely movable joint with a joint cavity containing synovial fluid; a diarthrosis
Term
tendon
Definition
fibrous band of connective tissue that attaches a muscle to a bone
Term
thorax
Definition
upper part of the trunk between the neck and the abdomen; formed by the 12 pairs of ribs and sternum
Term
ankylosing spondylitis
Definition
chronic,progressive inflammatory disease involving the spinal joins and surrounding soft tissue, most common in young males. aka rheumatoid spondylitis
Term
ankylosis
Definition
immobility and fixation of a joint
Term
arthritis
Definition
inflammation of a joint
Term
chondrosarcoma
Definition
malignant tumor of a joint
Term
curvature of the spine
Definition
An exaggerated spinal curve
Term
degenerative joint disease (DJD)
Definition
Osteoarthritis
Term
fracture
Definition
A break in the bone
Term
gout
Definition
A form of acute arthritis caused by deposit of uric acid salts in the joints; usually beginning in the knee or foot
Term
herniated disk
Definition
protrusion of the center (nucleus pulposus) of an intervertebral disk in the spinal canal; aka ruptured or "slipped" disk
Term
kyphosis
Definition
An exaggerated curve of the spine in the thoracic region; hunchback, humpback
Term
lordosis
Definition
An exaggerated curve of the spine in the lumbar region; swayback
Term
osteoarthritis (OA)
Definition
Progressive deterioration of joint cartilage with growth of new bone and soft tissue in and around the joint
Term
osteogenic sarcoma
Definition
A malignant bone tumor; osteosarcoma
Term
osteomalacia
Definition
A softening and weakening of the bones due to vitamin D deficiency or other disease
Term
osteomyelitis
Definition
Inflammation of bone and bone marrow caused by infection, usually bacterial
Term
osteopenia
Definition
A lower-than-average bone density, which may foreshadow osteoprorsis
Term
osteoporosis
Definition
A condition characterized by reduction in bone density
Term
Paget disease
Definition
Skeletal disease of the elderly characterized by bone thickening and distortion with bowing of long bones; osteitis deformans
Term
Pott disease
Definition
Inflammation of the vertebrae, usually caused by tuberculosis
Term
rheumatoid arthritis (RA)
Definition
A chronic autoimmune disease of unknown origin resulting in inflammation of peripheral joints and related structures
Term
rheumatoid factor
Definition
A group of antibodies found in the blood in cases of rheumatoid arthritis and other systemic diseases
Term
rickets
Definition
Faulty bone formation in children, usually caused by a deficiency of vitamin D
Term
sciatica
Definition
Severe pain in the leg along the course of the sciatic nerve, usually related to spinal nerve root irritation
Term
scoliosis
Definition
A sideways curvature of the spine in any region
Term
spondylolisthesis
Definition
A forward displacement of one vertebra over another
Term
spondylolysis
Definition
Degeneration of the articulating portions of a vertebra allowing for spinal distortion, specifically in the lumbar region
Term
alkaline phosphatase
Definition
An enzyme needed in the formation of bone
Term
arthrocentesis
Definition
Aspiration of fluid from a joint by needle puncture
Term
arthrodesis
Definition
Surgical immobilization (fusion) of a joint; artificial ankylosis
Term
arthroplasty
Definition
Partial or total replacement of a joint with a prosthesis
Term
arthroscopy
Definition
Use of an endoscope (arthroscope) to examine the interior of a joint or to perform surgery on the joint
Term
diskectomy
Definition
Surgical removal of a herniated intervertebral disk; aka discectomy
Term
orthopedics
Definition
The study and treatment of disorders of the skeleton, muscles, and associated structures
Term
reduction of a fracture
Definition
Return of a fractured bone to a normal position
Term
traction
Definition
The process of drawing or pulling
Term
antiinflammatory agent
Definition
Drug that induces inflammation; includes steroids & nonsteroidal antiinflammatory drugs (NSAIDs)
Term
bisphosphonate
Definition
Agent used to prevent and treat osteoporosis; increases bone mass by decreasing bone turnover
Term
nonsteroidal antiinflammatory drug (NSAID)
Definition
Drug that reduces inflammation but is not a steroid
Term
selective estrogen receptor modulator (SERM)
Definition
Drug that acts on estrogen receptors
Term
annulus fibrosus
Definition
the outer ringlike portion of an intervertebral disk
Term
calvaria
Definition
the domelike upper portion of the skull
Term
coxa
Definition
hip
Term
cruciate ligaments
Definition
ligaments that cross in the knee joint to connect the tibia and fibula; the anterior cruciate ligament (ACL) & posterior cruciate ligament (PCL)
Term
genu
Definition
the knee
Term
glenoid cavity
Definition
The bony socket in the scapula that articulates with the head of the humerus
Term
hallux
Definition
the great toe
Term
malleolus
Definition
The projection of the tibia and fibula on either side of the ankle
Term
meniscus
Definition
Crescent-shaped disk of cartilage found in certain joints
Term
olecranon
Definition
The process of the ulna that forms the elbow
Term
os
Definition
bone
Term
osseous
Definition
pertaining to the bone
Term
symphysis pubis
Definition
the anterior pelvic joint, formed by the union of the two pubic bones, aka pubic symphysis
Term
achondroplasia
Definition
decreased growth of cartilage in the growth plate of long bones resulting in dwarfism; a genetic disorder
Term
Baker cyst
Definition
mass formed at the knee joint by distention of a bursa with excess synovial fluid resulting from chronic irritation
Term
bunion
Definition
inflammation and enlargement of the metatarsal joint of the great toe, usually with displacement of the great toe toward other toes
Term
bursitis
Definition
inflammation of a bursa, a small fluid-filled sac near a joint
Term
carpal tunnel syndrome
Definition
numbness and weakness of the hand caused by pressure on the median nerve as it passes through a tunnel formed by carpal bones
Term
chondroma
Definition
a benign tumor of cartilage
Term
Ewing tumor
Definition
a bone tumor that usually appears in children 5 to 15 years of age. It begins in the shaft of a bone and spreads readily to other bones. It may respond to radiation, but then it returns. aka Ewing sarcoma
Term
exostosis
Definition
A bony outgrowth from the surface of a bone
Term
giant cell tumor
Definition
a bone tumor that usually appears in children and young adults. The ends of the bones are destroyed, commonly at the knee, by a large mass that does not metastasize
Term
hammertoe
Definition
change in position of the toe joints so that the toe takes on a clawlike appearance and the first joint protrudes upward, causing irritation and pain on walking
Term
hallux valgus
Definition
painful condition involving lateral displacement of the great toe at the metatarsal joint. There is also enlargement of the metatarsal head and bunion formation
Term
Heberden nodes
Definition
small, hard nodules formed in the cartilage of the distal finger joints in osteoarthritis
Term
hemarthrosis
Definition
bleeding into a joint cavity
Term
Legg-Calve-Perthes disease
Definition
degeneration (osteochondrosis) of the femur's proximal growth center. The bone is eventually restored, but there may be deformity and weakness. Most common in young boys; aka coxa plana
Term
multiple myeloma
Definition
a cancer of blood-forming cells in bone marrow
Term
neurogenic arthropathy
Definition
degenerative joint disease caused by impaired nervous stimulation; most common cause is diabetes mellitus; Charcot arthropathy
Term
Osgood-Schlatter disease
Definition
degeneration (osteochondrosis) of the tibia's proximal growth center causing pain and tendinitis at the knee
Term
osteochondroma
Definition
a benign tumor consisting of cartilage and bone
Term
osteochondrosis
Definition
disease of a bone's growth center in children; tissue degeneration is followed by recalcification
Term
osteodystrophy
Definition
abnormal bone development
Term
osteogenesis imperfecta (OI)
Definition
a hereditary disease resulting in the formation of brittle bones that fracture easily. There is faulty synthesis of collagen, the main structural protein in connective tissue
Term
osteoma
Definition
a benign tumor that usually remains small and localized
Term
Reiter syndrome
Definition
Chronic polyarthritis that usually affects young men; occurs after a bacterial infection and is common in those infected with HIV; may also involve the eyes and genitourinary tract
Term
spondylosis
Definition
Degeneration and ankylosis of the vertebrae resulting in pressure on the spinal cord and spinal nerve roots; often applied to any degenerative lesion of the spine
Term
sprain
Definition
trauma to a joint involving the ligaments
Term
subluxation
Definition
a partial dislocation
Term
talipes
Definition
a deformity of the foot, especially one occuring congenitally; clubfoot
Term
valgus
Definition
bent outward
Term
varus
Definition
bent inward
Term
von Recklinghausen disease
Definition
loss of bone tissue caused by increased parathyroid hormone; bones become decalcified and deformed, and fracture easily
Term
allograft
Definition
graft of tissue between individuals of the same species but different genetic makeup; homograft, allogenic graft
Term
arthroclasia
Definition
surgical breaking of an ankylosed joint to provide movement
Term
aspiration
Definition
removal by suction; also inhalation
Term
autograft
Definition
graft of tissue taken from a site on or in the body of the person recieving the graft; autologous graft
Term
calcitonin
Definition
a thyroid hormone that decreases resorption (loss) of bone tissue; used in the treatment of Paget disease and osteoporosis; aka thyrocalcitonin
Term
chondroitin
Definition
a complex polysaccharide found in connective tissue; used as a dietary supplement, usually with glucosamine, for treatment of joint pain
Term
glucosamine
Definition
a dietary supplement used in the treatment of joint pain
Term
goniometer
Definition
a device used to measure joint angles and movements
Term
iontophoresis
Definition
introduction into the tissue by means of electric current, using ions of a given drug; used in the treatment of musculoskeletal disorders
Term
laminectomy
Definition
excision of the posterior arch (lamina) of a vertebra
Term
meniscectomy
Definition
removal of the crescent-shaped cartilage (meniscus) of the knee joint
Term
myelogram
Definition
radiograph of the spinal canal after injection of a radiopaque dye; used to evaluate a herniated disk
Term
osteoplasty
Definition
scraping and removal of damaged bone from a joint
Term
prosthesis
Definition
an artificial organ or part
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