section 2, chapter 8: joint movements

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Information about section 2, chapter 8: joint movements
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Published on February 4, 2014

Author: MichaelWalls1

Source: slideshare.net

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joint movements

Section 2, Chapter 8 Types of Joint Movements

Types of Joint Movements Movement at a joint occurs when a muscle contracts and its fibers pull its moveable end (insertion) towards its fixed end (origin). Abduction = movement away from the midline (think of someone being abducted, or taken away) Adduction = movement towards the midline (think of adding together)

Types of Joint Movements Flexion = decreases the angle of a joint • Bend elbow Extension = increases the angle of a joint • Extend elbow Hyperextension = extension beyond the anatomical position • bend hand back, bend head back beyond anatomical position

Types of Joint Movements Rotation = movement around a central axis • Twisting the head from side to side Circumduction = movement so end follows a circular path • moving the finger in a circular motion without moving the hand.

Types of Joint Movements Supination = turning the hand so the palm faces upward or anteriorly Example: turning a doorknob clockwise with your right hand. Pronation = turning the hand so the palm faces downward or posteriorly Dorsiflexion = movement at the ankles that points toes towards the sky Plantar flexion = movement at the ankles that points toes towards the ground

Types of Joint Movements Elevation = raising a part • Shrugging the shoulders Depression = lowering a part • Drooping the shoulders Protraction = moving a part forward • thrusting head forward Retraction = moving a part backward • pulling the head backward

Types of Joint Movements Eversion = turning the foot so the planter surface faces laterally Inversion = turning the foot so the plantar surface faces medially End of Chapter 8, Section 2

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