Articulations Flashcards
(27 cards)
joint is the meeting-place of two or more bones
articulation
refers to the normal extent of mobility for a specific joint movement,
and typically refers to the movement possible at the freely movable synovial joints
Range of motion (ROM)
the number of axes at which movement in a joint occurs
the more likely it is to get injured
degrees of freedom (DOF)
is a group of connective tissue disorders that can be caused by mutations on one of more than a dozen different gene
Euler- Danlos Syndrome (EDS)
Three mayor structural categories of joints
fibrous, cartilaginous and synovial
raises limbs forward (anterior) to the sagittal plane
flexion
moves limbs backwards (posterior) to the sagittal plane
extension
special terminology for ankle
dorsiflexion and plantar flexion
moves the foot from anatomical position in a superior direction toward the shin
dorsiflexion
which is the equivalent of extension, moves the foot in an inferior direction, as in standing on the toes
plantar flexion
movement away from the midline,
Abduction
movement towards the midline
Adduction
can refer to the body’s midline (as in abduction–adduction of the shoulder) or it can refer to the midline of other structures
midline
combination if movements in a cone like shape
circumduction
of a joint occur around the longitudinal axis of the moving segment, and include rotation of the head on the neck, rotation of the intervertebral joints of the spine, and rotations possible at the ball-and-socket joints
Rotation
is capable of a specialized rotation at the proximal and distal radioulnar joints
supinated and pronation
moves upward (superior direction)
Elevation
moves downward or inferiorly
Depression
possible at the temporomandibular (jaw) and scapulothoracic joints
Protraction and retraction
connect the membranous bones of the skull
immovable
Sutures
Incompletely ossified membranous areas presented in fetal and infant skull
Become ossified by age 2
Fontanels
bones are connected by an interosseous ligament.
allow slight shift o “give” movement
Syndesmoses
how teeth articulate with the mandibular and maxillary sockets
Gomphosis
Hyaline cartilage connects bones or parts of bones
reveals development history
Synchondroses