Joints and Movement Flashcards
(ACJ) acromioclavicular joint
between acromion process of scapula and acromial end of clavicle. Has two parts, one connects to conoid and the other the trapezoid part.
Fibrous Joints
articulating bones that are United by fibrous connective tissue. Almost all are classified as synarthroses but this depends on fibre length.
synarthroses/synarthrotic
immovable joint
cartilaginous joints are…
articulating bones that are fused/unoted by cartilage. Mostly amphiarthroses but there are a few that are synarthroses.
amphiarthroses
slight movement of the joint is possible
diarthrosis
full movement of joint
synovial joints
complex and with the features:
- a joint cavity
- synovial fluid
- articular cartilage
- articular capsule/joint capsule
Hinge Joint
synovial join type a
- moves in one axis, allows extension/flexion
- eg elbow joint
pivot joint
synovial joint type b
- joint is uniaxial but allows pro/supination
- proximal radio-ulnar joint
planar joint
synovial joint type c
- joints glide, non-axial movement
- inter carpal and inter tarsal joints
condylar joint
synovial joint type d
- bi-axial
- eg metacarpophalangeal joints (knuckles)
saddle joint
synovial joint type e
- thumb MCPJ (metacarpophalangeal joint)
Ball and socket joint
synovial joint type f
- can move along multiple axis
- eg hip and shoulder
Bursae
flattened fibrous sacs lined with synovial membrane and a thin film of synovial fluid
tendon sheaths
elongated bursae that wrap around tendons
tendons provide
Dynamic support to muscles and are supporting joints of muscles
atlanto-occipital joint
lies between the occipital condyle and superior facet of the atlas.
Atlanta-occipital joint movement and classification
synovial, diarthrotic
Atlanto-axial joints x3
2x between atlas and axis lateral (on superior and inferior facets)
1x medial pivot joint with dens and facet of dens
Atlanto-axial joints movement and classification
synovial, diarthrotic
facet joints- diarthroses
articular synovial joints between each vertebra. each vertebra has two sets of superior and inferior facet articulations
Where is an Intervertebral joint (cartilaginous joint) found
Between two vertebral bodies.
Eg intervertebral disc which attaches adjacent bodies and provides cushioning and shock absorbency (only 2 fibre directions)
Anterior and posterior longitudinal ligament (run the whole way down)
Continuous supporting bands cover the ventral and dorsal aspects of vertebral body from neck to sacrum
Interspinous ligament
Between the spinous process of the vertebrae and stabilised extension and flexion
Ligamentum flavum
Join vertebral lamina together segmentally
Supraspinous ligament
Cord-like band connecting spinous process from lower cervical region to sacrum. Merges with the Michal ligament superiorly
Ligamentum nuchae
Large, sheet like elastic ligament connecting cervical vertebrae to skull. Attaches from external occipital protein wrench to cervical spinous process. Finished at C7
Costovertebral joint- synovial and diarthrotic
Head of rib and two vertebral bodies