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Arthrology
Study of joints
Synarthrodial Joints
Immoveable, Tightly connected by fibrous tissue or cartilage, lacks articular cavity
Suture
type of synarthrodial joint characterized by a thin layer of dense fibrous tissue
Synchondrosis
type of synarthrodial joint found between diaphysis and epiphysis in the long bones of children
Amphiathrodial joint
slightly moveable joint
Symphysis
type of amphiathrodial joint that is joined by a pad of fibrocartilage (ex. symphysis pubis, intervertebral discs)
Syndesmosis
a type of amphiathrodial joint that are bones held together by collagenous fibers or interosseous ligaments (ex. distal ends of tibia and fibula, distal ends of radius and ulna)
Diathrodial Joint
freely moveable, have joint capsules that contains synovial fluid
Gliding
Type of diarthrodial joint that allows gliding/sliding movement, articulating surfaces are flattened or slightly curved, and are nonaxial (no specific axis of movement) (ex. intercarpals, vertebral bodies)
Hinge
type of diarthrodial joint that permits bending in one place, one articulating surface is concave while other is convex, and is unaxial (one axis of movement) (ex. humeroulnar, interphalangeal (fingers and toes))
Pivot
Type of diarthrodial joint that permits rotation in one place, articular surface of one bone is round and fits into depression on another bone, unaxial (one axis of movement) (ex. radioulnar, atlanto-axial)
Condyloid (ellipsoidal)
type of diarthrodial joint that permits movement in two places, one articulating surface is convex ad other is concave, biaxial (2 axes of movement) (ex. radiocarpal, metacarpophalangeal, tibiofemoral)
Saddle (sellar)
Type of diarthrodial joint that permits movement in two planes, one articulating surface is concave in one direction and other surface is convex in another direction, biaxial (2 axes of movement) (ex. carpometacarpal (base of thumb))
Ball and Socket
Type of diarthrodial joint that permits movement in three planes, one articulating surface is rounded and other is a cup-like cavity, multiaxial (3 axes of movement) (ex. hip, shoulder)
Flexion
movement of the body that decreases the joint angle
Extension
movement of the body that increases a joint angle
Abduction
movement of the body away from the midline
Adduction
movement of the body moving toward the midline of the body
Horizontal Abduction (transverse extension)
horizontal movement away from the midline
Horizontal Adduction (transverse flexion)
horizontal movement towards the midline
External Rotation (outward rotation)
rotating axis of bone away from the body
Internal Rotation (inward rotation)
rotating axis of bone towards the body
Eversion
Turning sole of foot outward
Inversion
Turn sole of foot inwards
Dorsiflexion
Top of foot towards the shin
Plantarflexion
top of foot away from the shin (toe raise)
Supination
turning palm upward (holding a bowl of soup)
Pronation
turning palm downwards
Circumduction
proximal end of limb remains stationary, distal end moves in circular pattern
Cranial Bones
(8): Frontal, Parietal(2), Occipital, Temporal(2), Sphenoid, Ethomoid
Facial Bones
(12): Maxilla(2), Palatine(2), Zygomatic(2), Lacrimal(2), Nasal(2), Vomer, Mandible
Coronal
Suture of skull. Separates Frontal from Parietal.
Sagittal
Suture of the skull. Divides Parietals in half.
Lambdoidal
Suture of skull. Separates Occipital from Parietal.
Squamous
Suture of skull. Separates Temporal from Parietal.

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