Chapter 9 - Musculoskeletal System Disorders Flashcards
epimysium
the thick, dense collagenous connective tissue that surrounds an entire muscle
perimysium
a sheath of connective tissue that groups muscle fibers into bundles or fascicles
fascicle
(1) a small or slender bundle (as of pine needles or nerve fibers)
(2) one of the divisions of a book published in parts
endomysium
meaning within the muscle, it is a wispy layer of areolar connective tissue that ensheaths each individual muscle fiber, or muscle cell. It also contains capillaries and nerves
wisp (adjective: wispy)
(1) a small handful (as of hay or straw)
(2) a thin strip or fragment
(3) a thread-like streak (e.g. smoke)
(4) something frail, slight, or fleeting
anabolic steroids
synthetic hormones similar to testosterone
Crohn’s disease
chronic inflammation that typically involves the lower portion of the ileum, often spreads to the colon, and is characterized by diarrhea, cramping, loss of appetite and weight, and the development of abscesses and scarring
tetany
a condition of physiological calcium imbalance marked by tonic spasm of muscles and often associated with deficient parathyroid secretion
tonic (muscular system)
marked by prolonged muscular contraction
proprioception
Proprioception, also referred to as kinaesthesia or kinesthesia, is the sense of self-movement and body position. It is sometimes described as the “sixth sense”. Proprioception is mediated by proprioceptors, mechanosensory neurons located within muscles, tendons, and joints.
electromyography (EMG)
A diagnostic test that measures how the muscles and nerves work. Providers insert thin needles through the skin and into the muscles. When you move your muscles, electrodes on the end of the needles measure activity in the muscles. Providers use EMG to diagnose injuries, muscle disease and neuromuscular disorders.
complete fracture
when the bone is broken to form two or more separate pieces
incomplete fracture
when the bone is only partially broken
greenstick fracture
an incomplete fracture, common in the softer bones of children, in which the shaft of the bone is bent, tearing the cortical bone (outer layer of compact bone) on one side but not extending all the way through the bone
simple fracture
a single break in the bone in which the bone ends maintain their alignment and position
segmental fracture
a bone break in which several large bone fragments separate from the main body of a fractured bone
comminuted fracture
a fracture in which there are multiple fracture lines and bone fragments
compression fracture
a fracture, common in the vertebrae, occurring when a bone is crushed or collapses into small pieces
impacted fracture
a fracture that occurs when one end of the bone is forced or telescoped into the adjacent bone; for example, the neck of the femur is crushed against the pelvis
pathologic fracture
a fracture that results from a weakness in the bone structure due to conditions such as a tumor or osteoporosis. The break occurs spontaneously or with very little stress on the bone.
stress fracture
also called a fatigue fracture; a fracture that results from repeated excessive stress, commonly in the tibia, femur, or second and third metatarsals.
depressed fracture
a fracture that occurs in the skull when the broken section is forced inward on the brain
transverse fracture
a fracture across the bone, at a right angle to the long axis
linear fracture
a break along the long axis of the bone
oblique fracture
a break at an angle to the diaphysis of the bone
spiral fracture
a break that angles around the bone, usually due to a twisting injury
Colles fracture
a break in the distal radius at the wrist, commonly occurring when a person attempts to break a fall by extending the arm and open hand. Sometimes the ulna is also damaged
Pott fracture
a fracture of the lower fibula due to excessive stress on the ankle, such as occurs when stepping down with force. The tibia may be damaged as well
long axis of the bone
the long part of the bone (e.g. from the top to the bottom of the femur)
five stages of bone healing
(1) hematoma forms at site of fracture
(2) granulation tissue forms
(3) fibrocartilage callus forms a soft callus
(4) fibrocartilage callus hardens into a hard callus
(5) body remodels the bone to make it like new, slowly breaking down excess bone