Week 3 Quiz Prep Flashcards
Ball and socket joint
-Smooth, hemispherical head fits with cup-like socket
-only multiAxial joints in the body
-shoulder, hip
Plane (gliding) joints
-Flat articular surface; bones slide over each other
-Usually biaxial joints
-Between carpal bones of wrist,
between tarsal bones of ankle,
between articular processes of vertebrae
Sacroiliac (sacrum to hip)
Hinge joints
-One bone with convex surface fits into a concave depression of another bone
-monoaxial-move freely in one plane
-Elbow, knee, joints within finger, toes
Condylar (ellipsoid) joints
Oval, convex surface of one bone fits into a complementary shaped depression on the other
-biaxial-movement in two planes
-Radiocarpal joint (wrist), metacarpophalangeal joints
Tmj signs and symptoms
-Signs, clicking, popping, grating noises -restricted jaw movement
-pain that intensifies with chewing and yawning
TMJ treatments
-Pain medication
-Behavioral therapy to reduce anxiety, depression, and stress
TMJ dysfunction
-A cluster of disorders afflicting 20 to 30% of adults 20-40yrs old
-females 2x more likely
Elbow
Humeroulnar joint-
Trochlea of the humerus joins Trochlear notch of the ulna
Elbow
Humeroradial-
Capitulum of humerus meets head of radius
SITS
Supraspinatus
Infraspinatus
Teres minor
Subscapularis
(Fuse to form rotator cuff)
Shoulder dislocation
Anterior
-95% of all cases, Can be blow from above, Down/forward?
Posterior
-backward
Shoulder dislocation occurs when
- The head of humerus (comes out) of glenoid cavity of the scapula
-Acromioclavicular joint_superior to shoulder joint
Contraction of Muscles
What bands contract?
Actin Shrinks
I band Shrinks
H band disappears
Contraction of muscle
No contractions or limited
A band
Myosin
M-line
Small motor unit
-A fine degree of control
-Eye and hand muscle
-only 3 to 5 muscle fibers each
