Chapter 9 Flashcards
Arthrology
The study of joints
Gliding Motion
Two opposing surfaces sliding back-and-forth or side-to-side; angle between bones unchanged; limited movement (plane joints)
Angular Motion
Either increases or decreases angle between two bones
Flexion
Movement in an anterior-posterior plane; decreases angle between bones
Extension
Increases angle between articulating bones; opposite of flexion
Hyperextension
Joint extended more than 180 degrees
Lateral Flexion
Trunk of body moving in coronal plane laterally; occurs primarily between vertebrae in the cervical and lumbar region
Adduction
Medial movement of body part toward midline
Abduction
Lateral movement of body part away from midline
Circumduction
Proximal end of appendage relatively stationary; dital end makes a circular motion; Occurs as a result of flexion, abduction, extension, adduction
Lateral Rotation
turns anterior surface of femur or humerus laterally
Medial Rotation
turns anterior surface of femur or humerus medially
Pronation
Medial rotation of forearm so palm of the hand posterior
Supination
lateral rotation of the forearm so palm of the hand anterior
Depression
Inferior movement of a part of the body
Elevation
Superior movement of a body part
Dorsiflexion
Talocrural (ankle) joint bent so the dorsum of the foot moves toward the leg (toes up)
Plantar Flexion
Talocrural joint bent so the dorsum is pointed inferiorly (toes down)
Inversion
Sole turns medially; occurs at the intertarsal joints of the foot only
Eversion
Occurs at the intertarsal joints only; sole turns laterally
Protraction
Anterior movement from anatomic position (chin forward)
Retraction
Posterior movement from anatomic position (chin back)
Meniscus
partially stabilize joint medially and laterally; act as cushioning between articular surfaces
Anterior Cruciate Ligament
extends from posterior femur to anterior tibia; prevents hyperextension; prevents tibia moving too far anteriorly on the femur
Posterior Cruciate Ligament
Runs from anteroinferior femur to posterior tibia; prevents hyperflexion; prevents posterior displacement of tibia on the femur
Fibular collateral ligament
reinforces lateral surface of the joint; prevents hyperadduction of leg at the knee
Tibial collateral ligament
Reinforces the medial surface of the knee joint; extends from femur to tibia; prevents hyperabduction of leg at the knee
Tibiofemoral joint
between condyles of femur and condyles of tibia
Patellofemoral joint
between patella and patellar surface of femur
Patellar ligament
extends from patella to the tibial tuberosity
Quadriceps femoris tendon
Passes over knee’s anterior surface; patella embedded here
Plane Joint
Between tarsal bones, slides along one plane, uniaxial
Hinge Joint
elbow, uniaxial
Pivot Joint
turning, uniaxial
Condylar Joint
biaxial, joystick, allows rotation but no movement
Saddle Joint
biaxial and movable joint that allows movements on two planes-flexion or extension and abduction or adduction
Ball and Socket
a rounded bone moving within a depression of another bone