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Chapter 9 B
Joints
27
Anatomy
Undergraduate 1
03/26/2014

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Term
flexion
Definition
Movement that decreases the angle of a joint
Term
extension
Definition
Movement that increases the angle of a joint
Term
hyperextension
Definition
Movement that increases the angle of a joint beyond 180 degrees
Term
abduction
Definition
Movement of a body part away from the midline
Term
adduction
Definition
Movement of a body part toward the midline
Term
elevation
Definition
Movement thatĀ raises a bone vertically
Term
depression
Definition
Movement that lowers a bone vertically
Term
protraction
Definition
Movement of a bone anteriorly
Term
retraction
Definition
MovementĀ of a bone posteriorly
Term
lateral excursion
Definition
Movement of the jaw sideways to the right or left
Term
medial excursion
Definition
Movement of the jaw back to the midline from the right or left
Term
circumduction
Definition
Movement in which one end of an appendage remains relatively stationary while the other end makes a circular motion
Term
rotation
Definition
Movement that twist a bone on its longitudinal axis
Term
supination
Definition
Rotation of the forearm so the palm faces anteriorly in anatomical position
Term
pronation
Definition
Rotation of the forearm so the palm faces posteriorly
Term
opposition
Definition
Movement of the thumb to touch the fingertips
Term
reposition
Definition
Movement of the thumb from touching the fingertips back to anatomical position
Term
dorsiflexion
Definition
Raising of the toes or foot upward
Term
plantar flexion
Definition
Extension of the toes or foot so that they point downward
Term
inversion
Definition
Raising the sole of the foot medially
Term
eversion
Definition
Raising the sole of the foot laterally
Term
lever
Definition
Elongated, rigid object that rotates around a fixed point
Term
flucrum
Definition
The fixed point that an elongated, rigid object rotates around
Term
first-class lever
Definition
Lever in which the fulcrum is in the middle
Term
second-class lever
Definition
Lever in which the resistance is in the middle
Term
third-class lever
Definition
Lever in which the effort is applied between the fulcrum and resistance
Term
temporomandibular joint
Definition
Articulation of the condyle of the mandible with mandibular fossa of the temporal bone
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