Ch. 4 Muscular System Flashcards
muscul/o, my/o, myos/s
muscle
fasci/o
fascia
ten/o, tend/o, tendin/o
tendons
muscle functions
hold body erect, generate 85% heat, move food through digestive system, movement, walking, move fluid through body
muscle fibers
long slender cells that make muscles. held together by connective tissue
fascia
sheets of fibrous connective tissue that covers, supports, and separates muscles. flexible to allow muscle movement
tendons
narrow band of nonelastic, dense connective tissue. connect muscle to bone
skeletal muscle
attached to bones. make movement possible
smooth muscle
in walls of organs. vessels, GI tract, ducts leading from glands
myocardial muscle
walls of heart
muscle innervation
stimulation by motor nerve impulse. when stimulation stops, muscle relaxes.
neuromuscular
pertaining to nerve/muscle
antagonistic pairs
muscle pairs work in opposition. one contracts while other relaxes
contraction
tightening.becomes shorter and thicker, causing center of muscle to enlarge
relaxation
when muscle returns to original form. becomes longer and thinner
abduction
movement away from midline
adduction
movement toward midline
flexion
decreasing angle between 2 bones. bending limb at joint
extension
increasing angle. straightening of joint
elevation
raising/lifting body part
depression
lowering body part
circumduction
circular movement at far end of limb
rotation
circular movement around axis
supination
rotation of arm/leg so palm/sole is facing upward/forward
pronation
rotation of arm/leg so palm/sole is facing backward/downward
dorsi flexion
bends foot upward at ankle
plantar flexion
bends foot downward at ankle
origin
less movable attachment. where muscle begins. nearest midline on less movable part of skeleton
insertion
more movable attachment. where muscle ends
oblique
slanted, at an angle
sphincter
ring shaped muscle. constricts opening of passageway
rectus
straight alignment with vertical axis of body
transverse
crosswise
gluteus maximus
largest muscle of buttocks
deltoid
shaped like inverted triangle
chronic fatigue syndrome
unknown cause. not improved by bed rest and lasts longer than 2 months
adhesion
band of fibrous tissue. hold structures together abnormally. forms in muscles/organs
atrophy
weakness or wearing away. caused by pathology or disuse
myalgia
tenderness/pain in muscle
myocele
herniation through tear in fascia surrounding
myolysis
degeneration of muscle tissue
momalacia
abnormal softening of muscle
myorrhexis
rupture or tearing of muscle
polymyositis
muscle disease characterized by simultaneous inflammation and weakening
sarcopenia
loss of muscle mass, strength, and function. comes with aging
muscular dystrophy
progressive weakness and degeneration of skeletal muscles. doesnt affect CNS
carpal tunnel syndrome
tendons pass through the carpal tunnel. chronic overuse causes inflammation
-tonic
pertaining to muscle tone
muscle tone
state of balanced muscle tension
a-
without
-tax
coordination
-ia
condition
atonic
lacking muscle tone
dystonia
abnormal tone. impairment of voluntary muscle movement
hypertonia
excessive muscle tone
hypotonia
diminished muscle tone
myotonia
neuromuscular disorder. causes slow relaxation of muscle
ataxia
inability to coordinate
dystaxia
mild form of ataxia
contracture
permanent tightening of fascia, muscles, and tendons
intermittent claudication
pain in leg muscles during exercise
spasm
sudden muscle contraction
cramp
localized spasm
spasmodic torticollis
stiff neck