Articulations Flashcards
TMJ
temporomandibular joint
articular capsule surrounds joint
articular disc; fibrocartilage; creates two different joints ( temporal, disc, mandibular condyle)
2 joints:
-hinge joint (depression/elevation)
-gliding (planar) joint (protraction/retraction)
TMJ pain is associated with pain throughout the face, because of intervation of sensory nerves of the trigeminal nerve
intervertebral articulations
symphysis and gliding (planar) joints
intervertebral discs
symphysis articulation
two parts:
-anulus fibrosus
-nucleus pulposus
anulus fibrosus
tough outer layer of fibrocartilage; covers disc; binds disc to adjacent vertebral bodies
nucleus pulposus
inner gelatinous core of disc; shock absorber/resilience composed of water and supportive fibers with age, water is gradually lost: -greater chance of vertebral injury and -shortening of vertebral column
gliding joint articulations
sup. & inf. articular processes
restricted movement individually, but as a whole column, flexion, extension, and lateral flexion are all possible
ligamentum nuchae
extends from C7 to base of skull
stabilize skull
sternoclavicular joint
saddle joint
b/n manubrium and clavicle
elevation, depression, circumduction
clavicle usually breaks before joint dislocating
acromioclavicular
AC joint
gliding joint
strengthened and supported by the acromioclavicular ligament
bound to coracoid process by coracoclavicular ligament
“shoulder separation” coracoclavicular ligament torn
glenohumeral joint
ball and socket joint
greatest range of motion; most dislocated
strength from rotator cuff (SITS)
supraspinatus, infraspinatus, teres minor, subscapularis
glenoid labrum
fibrocartilage lip surrounding glenohumeral joint;
deepens concavity of joint to help stabilize
rotator cuff
SITS supraspinatus, infraspinatus, teres minor, subscapularis
