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Ch 7 - WWCC Medical Terminology
Muscles and Joints
115
Medical
Professional
10/22/2011

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Term
arthralgia
Definition
Pain in the joints; symptom present in many join diseases.
Term
atrophy
Definition
Wasting away; literally "without development."
Term
cardiac muscle
Definition
Specialized type of muscle that forms the wall of the heart. Involuntary muscle.
Term
contract/contraction
Definition
A reduction in size, especially of muscle fibers.
Term
contracture
Definition
An abnormal (usually permanent) bending of a join into a fixed position; usually caused by atrophy and shortening of muscle fibers.
Term
facia
Definition
Thin sheets of fibrous connective tissue that penetrate and cover the entire muscle, holding the fibers together.
Term
insertion
Definition
The point of attachment of a muscle to a bone it moves.
Term
involuntary muscles
Definition
Muscles that act without conscious control. They are controlled by the autonomic nervous system and hormones.
Term
muscle fiber
Definition
The name given to the individual muscle cell.
Term
origin
Definition
The point of attachment of a muscle to a bone that is less movable.
Term
pelvic girdle weakness
Definition
Weakness of the muscles of the pelvic girdle.
Term
psuedohypertrophic muscular dystrophy
Definition
A form of muscular dystrophy that is characterized by progressive weakness and muscle fiber degeneration without evidence of nerve involvement or degeneration of nerve tissue. Also known as Duchenne's muscular dystrophy.
Term
skeletal muscle
Definition
Muscles that attach to the bones of the skeleton; also known as striated muscles. Voluntary muscle.
Term
smooth muscle
Definition
Muscles found in the walls of hollow organs and tubes such as the stomach, intestines, respiratory passageways, and blood vessels; also known as visceral muscles. Involuntary muscles.
Term
striated muscle
Definition
Muscles that have a striped appearance when viewed under a microscope. Examples: skeletal and cardiac muscles.
Term
tendon
Definition
A strong fibrous band of tissue that extends from a muscle, attaching it to the bone by becoming continuous with the periosteum of the bone.
Term
trunk
Definition
The main part of the body, to which the head and the extremities are attached; also called the torso.
Term
visceral muscle
Definition
Muscles of the internal organs; also known as smooth muscle.
Term
voluntary muscle
Definition
Muscles (such as skeletal muscles) that operate under conscious control. Those that are responsible for movement of the face, eyes, tongue, and pharynx are under voluntary control.
Term
buccinator
Definition
Muscle located in the fleshy part of the cheek.
Term
temporal
Definition
Muscle located above and near the ear.
Term
masseter
Definition
Muscle located at the angle of the jaw, also raises the mandible and closes the jaw.
Term
sternomastoid
Definition
Also called the sternocleidomastoid. It extends from the sternum upward along the side of the neck to the mastoid process.
Term
trapezius
Definition
A triangular shaped muscle that extends across the back of the shoulder, covers the back of the neck, and inserts on the clavicle and scapula.
Term
latissimus dorsi
Definition
Originates from the vertebrae of he lower back, crosses the lower half of the thoracic region, and passes between the humerus and scapula to insert on the anterior surface of the humerus. It forms the posterior border of the armpit.
Term
pectoralis major
Definition
A large, fan-shaped muscle that crosses the upper part of the front of the chest. It originates from the sternum and crosses over to the humerus. It forms the anterior border of the armpit.
Term
deltoid
Definition
Covers the shoulder joint. It originates from the clavicle and the scapula and inserts on the lateral side of the humerus. One of the muscles used for intramuscular injections.
Term
biceps brachii
Definition
Muscle has two heads, both of which originate from the scapula and insert on the radius.
Term
triceps brachii
Definition
Muscle has three heads, which originate form the scapula and the humerus and insert onto the olecranon process of the ulna (at the elbow).
Term
gluteus maximus
Definition
Forms most of the fleshy part of the buttock. Originates from the ilium and inserts in the femur.
Term
gluteus medius
Definition
Smaller muscle located above the upper outer quadrant of the gluteus maximus muscle. Originates from the posterior part of the ilium and inserts in the greater trochanter of the femur.
Term
quadriceps femoris
Definition
Four muscles that work together to extend the thigh and form the anterior part of the thigh.
Term
hamstring muscles
Definition
Located in the posterior part of the thigh. Responsible for flexing the leg on the thigh and extending the thigh. Originated from the ischium and insert on the fibula and tibia.
Term
gastrocnemius
Definition
Main muscle of the calf. Attaches to the calcaneus (heel bone) by way of the Achilles tendon. Used in standing on tiptoe (plantar flexing the foot) and in flexing the toes.
Term
tibialis anterior
Definition
Positioned on the front of the left. Responsible for turning the foot inward (inversion) and for dorsiflexing the foot.
Term
muscular dystrophy
Definition
A group of genetically transmitted disorders characterized by progressive symmetrical wasting of skeletal muscles; there is no evidence of nerve involvement or degeneration of nerve tissues.
Term
polymyositis
Definition
A chronic, progressive disease affecting the skeletal (striated) muscles. Characterized by muscle weakness of hips and arms and degeneration.
Term
rotator cuff tear
Definition
A tear in the muscles that form a "cuff" over the upper end of the arm.
Term
strains
Definition
An injury to the body of the muscle or attachment of the tendon, resulting from overstretching, overextension, or misuse.
Term
muscle biopsy
Definition
The extraction of a specimen of muscle tissue, through either a biopsy needle or an incisional biopsy, for the purpose of examining it under a microscope.
Term
electromyography
Definition
The process of recording the strength of the contraction of a muscle when it is stimulated by an electric current.
Term
abduction
Definition
Movement of a bone away from the midline of the body.
Term
adduction
Definition
Movement of a bone toward the midline of the body.
Term
articular cartilage
Definition
Thin layer of cartilage protecting and covering the connecting surfaces of the bone.
Term
articulation
Definition
The point at which two bones come together; a joint.
Term
ball-and-socket joint
Definition
A joint that allows movement in many directions around a central point.
Term
bunion
Definition
Abnormal enlargement of the join at the base of the great toe.
Term
bunionectomy
Definition
Surgical removal of a bunion; removing the bony overgrowth and the bursa.
Term
bursa
Definition
A small sac that contains synovial fluid for lubricating the area around the join where friction is most likely to occur.
Term
closed manipulation
Definition
The manual forcing of a joint back into its original position without making an incision; also called a closed reduction.
Term
crepitation
Definition
Clicking or cracking sounds heard upon joint movement.
Term
dorsiflextion
Definition
Bending of the foot backward, or upward, at the ankle. Narrows the angle between the leg and the top of the foot.
Term
extension
Definition
A straightening motion that increases the angle between two bones.
Term
flexion
Definition
A bending motion that decreases the angle between two bones.
Term
ganglionectomy
Definition
Surgical removal of a ganglion.
Term
hinge joint
Definition
A joint that allows movement in one direction; a back-and-forth motion.
Term
joint cavity
Definition
The space between two connecting bones.
Term
kyphosis
Definition
Humpback
Term
ligaments
Definition
Connective tissue bands that join bone to bone, offering support to the joint.
Term
malaise
Definition
A vague feeling of weakness.
Term
needle aspiration
Definition
The insertion of a needle into a cavity for the purpose of withdrawing fluid.
Term
photosensitivity
Definition
Increased reaction of the skin to exposure to sunlight.
Term
plantar flexion
Definition
Bending of the foot downward, at the ankle, as in ballet dancing. Increases the angle between the leg and the top of the foot.
Term
pronation
Definition
The act of turning the palm down of backward.
Term
rotation
Definition
The turning of a bone on its own axis.
Term
sciatica
Definition
Inflammation of the sciatic nerve, marked by pain and tenderness along the path of the nerve through the thigh and leg.
Term
subluxation
Definition
An incomplete dislocation.
Term
supination
Definition
The act of turning the palm up or forward.
Term
suture
Definition
An immovable joint.
Term
synovial fluid
Definition
A thick lubricating fluid located in synovial joints.
Term
synovial membrane
Definition
The lining of a synovial joint cavity.
Term
viscous
Definition
Sticky; gelatinous.
Term
fibrous joint
Definition
The surfaces of the bone fit closely together and are held together by fibrous connective tissue. An immovable joint.
Term
cartilaginous joint
Definition
The bones are connected by cartilage, as in the symphysis. Allows limited movement.
Term
synovial joint
Definition
The bones have a space between them called the joint cavity. Bones are held together by ligaments. Free movement joint.
Term
circumduction
Definition
Movement of an extremity around in a circular motion. Can be performed with ball-and-socket joints.
Term
adhesive capsulitis
Definition
A shoulder condition characterized by stiffness of the shoulder, limited shoulder movement, and pain; also known as "frozen shoulder."
Term
arthritis
Definition
Inflammation of joints.
Term
ankylosing spondylitis
Definition
A type of arthritis that affects the vertebral column and causes deformities of the spine.
Term
bunion (hallux valgus)
Definition
An abnormal enlargement of the joint at the base of the great toe.
Term
dislocation
Definition
The displacement of a bone from its normal location within a joint, causing loss of function of the joint.
Term
ganglion
Definition
A cystic tumor developing on a tendon; sometimes occurring on the back of the wrist.
Term
gout
Definition
A form of acute arthritis that is characterized by inflammation of the first metatarsal join of the great toe.
Term
herniated disk
Definition
The rupture of the central portion, or nucleus, of the disk through the disk wall and into the spinal canal. Also called a ruptured disk or slipped disk.
Term
Lyme disease
Definition
An acute, recurrent, inflammatory infection transmitted through the bite of an infected deer tick.
Term
osteoarthritis
Definition
Also known as degenerative join disease. It is the most common form of arthritis and results from wear and tear on the joints, especially weight bearing joints such as the hips and knees.
Term
rheumatoid arthritis
Definition
A chronic, systemic, inflammatory disease that affects multiple joints of the body, mainly the small peripheral joints such as in those of the hands and feet.
Term
sprains
Definition
An injury involving the ligaments that surround and support a joint, caused by a wrenching or twisting motion.
Term
systemic lupus erythematosus
Definition
A chronic inflammatory connective tissue disease affecting the skin, joints, nervous system, kidneys, lungs, and other organs. A "butterfly rash" appears on both cheeks, joined by a narrow band across the nose.
Term
arthrocentesis
Definition
The surgical puncture of a joint with a needle for the purpose of withdrawing fluid for analysis.
Term
arthrogram
Definition
An X-ray of a joint after injection of a contrast medium.
Term
arthrography
Definition
The process of X-raying the inside of a joint after a contrast media has been injected into the joint.
Term
arthroplasty
Definition
The surgical reconstruction of a joint.
Term
arthroscopy
Definition
The visualization of the interior of a joint by using an endoscope.
Term
rheumatoid factor
Definition
A blood test that measures the presence of unusual antibodies that develop in a number of connective tissue diseases, such as rheumatoid arthritis.
Term
erythrocyte sed rate
Definition
A blood test that measures the rate at which erythrocytes settle to the bottom of a test tube filled with unclotted blood.
Term
DIP
Definition
distal interphalangeal (join)
Term
ESR (sed rate)
Definition
erythrocyte sedimentation rate
Term
HNP
Definition
herniated nucleus pulposus
Term
MCP
Definition
metacarpophalangeal (joint)
Term
MTP
Definition
metatarsophalangeal (joint)
Term
OA
Definition
osteoarthritis
Term
PIP
Definition
proximal interphalangeal (joint)
Term
RA
Definition
rheumatoid arthritis
Term
RF
Definition
rheumatoid factor
Term
SLE
Definition
systemic lupus erythematosus
Term
IM
Definition
intramuscular
Term
MD
Definition
muscular dystrophy
Term
DTR
Definition
deep tendon reflexes
Term
EMG
Definition
electromyography
Term
perineum
Definition
The area between the scrotum and the anus in the male and between the vulva and anus in the female.
Term
myositis
Definition
Inflammation of muscle tissue, especially voluntary muscles caused by infection, trauma, autoimmunity, or infestation by parasites.
Term
ankylosis
Definition
Immobility of a joint.
Term
dystonia
Definition
Prolonged involuntary muscular contractions that may cause twisting of body parts, repetitive movements, and increased muscular tone.
Term
rhabdomyosarcoma
Definition
A malignant neoplasm (a new and abnormal formation of tissue as a tumor or growth) originating in skeletal muscle.
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