Download - The Elbow and Radioulnar Joints
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The Elbow and Radioulnar Joints
Anatomy and Kinesiology420:024
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The Elbow and Radioulnar Joints Usually grouped together due to close anatomical
relationship Elbow joint movements may be clearly distinguished
from those of the radioulnar joints Often grouped together due to proximity Entirely different
Structurally = 2, functionally = 1 Elbow joint distal attachment:
Ulna Radioulnar joint distal attachment:
Radius
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Objectives Bones, bony landmarks and joints Muscles Movements
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The Elbow and Radioulnar Joints Elbow Joint
Diarthrodial uniaxial hinge joint Plane? Axis? Movements? Articulation? Bony Stops?
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Radioulnar Joint Radioulnar Joint
Diarthrodial uniaxial pivot joint
Plane? Axis? Movements? Articulations?
From Seeley RR, Stephens TD, Tate P: Anatomy & physiology, ed 7, New York, 2006, McGraw-Hill; Shier D, Butler J, Lewis R: hole’s human anatomy & physiology, ed 9, New York, 2002, McGraw-Hill.
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Objectives Bones, bony landmarks and joint Muscles Movements
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Biceps Brachii
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Brachialis
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Brachioradialis
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Triceps Brachii
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Anconeus
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Pronator Teres
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Pronator Quadratus
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Supinator
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Objectives Bones, bony landmarks and joint Muscles Movements
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Movements Flexion:
Movement of forearm to shoulder by bending the elbow to decrease its angle Extension
Extension: Movement of forearm
away from shoulder by straightening the elbow to increase its angle
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Movements Pronation
Internal rotary movement of radius on ulna that results in hand moving from palm-up to palm-down position
Supination External rotary movement of
radius on ulna that results in hand moving from palm-down to palm-up position
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FLEXION Superior movement of the forearm in the
sagittal plane
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FLEXION
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FLEXION Biceps brachii Brachialis Brachioradialis Pronator teres
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EXTENSION Inferior movement of the foremarm in the
sagittal plane
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EXTENSION
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EXTENSION Triceps
Long head also extends the shoulder Anconeus
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PRONATION Internal rotary movement of the palm to the
down position
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Pronator Quadratus
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PRONATION
Supinated position
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PRONATION Brachioradialis Pronator teres Pronator quadratus
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SUPINATION External rotary movement of the palm to the up
position
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Supinator
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SUPINATION
Supinated position
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SUPINATION
Pronated position
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SUPINATION Biceps brachii Brachioradialis Supinator