NMS
7/21/99
Strain
· Injury to ct in b/w muscle cells
· More common than transverse
· Often called occult strains
· Tone—muscle spindles, keep tightened up, myofibrils loaded w/sarcomeres
· Hypotonic—increased distance b/w Z lines
o Lack of exercise
o Antagonist relationship
o Reciprocal inhibition
o Posture problems—external rotation
· Now add stress—weekend warrior
· Eccentric contraction of muscle in a lengthening state—active stretch (more stressful on a muscle compared to concentric)
· Decelerator
· Concentric contraction—active shortening of the muscle
· Longitudinal tears
|
|
Muscle |
Joint |
|
Active |
Negative |
negative |
|
Passive |
Negative |
negative |
|
Eccentric (functional study) |
Positive |
negative |
· Difficult to reproduce the pain
· Treatment
o Increase tone of the muscle
o Exercise w/resistance—in the direction that pain was found
· Trigger points are found w/in the ct that is damaged
· Tear of muscle fiber
· Contraction against resistance
· ROM study
o Active—painful
o Passive—hurt less
o Resisted—painful
o If a joint it would be painful on active and passive motion
· RICE—rest, ice
Muscle Spindles
· Surrounded by capsule
· Have a nuclear chain and nuclear bag
· Nuclear bag
o Quick stress is phasic—Ia fiber wrapped around
o DTR
· Nuclear chain
o Tonic
o Isotonic
o g motor neuron lands on the ends
o internal stretch—brings back to life the muscle spindle to restore tone
· g Motor Neuron—Fusimotor system
o Receives information from two places
1. Higher centers—cerebellum
2. reflexes—
· No Flowerspray on tomorrows test
Barry Wyke
· Subluxate a vertebrae
o One side is stretched and fire Type I or II—muscle spasm
o Go into the cord and land on g--facilitation
o