The Elbow and Radioulnar Joints Anatomy and Physiology of Human Movement 420:050.
Transcript of The Elbow and Radioulnar Joints Anatomy and Physiology of Human Movement 420:050.
The Elbow and Radioulnar Joints
Anatomy and Physiology of Human Movement
420:050
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
Objectives
Bones, bony landmarks and joints Muscles Movements
The Elbow and Radioulnar Joints
Elbow Joint Diarthrodial uniaxial hinge joint Plane? Axis? Movements? Articulation? Bony Stops?
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.
Objectives
Bones, bony landmarks and joint Muscles Movements
Biceps Brachii
Brachialis
Brachioradialis
Triceps Brachii
Anconeus
Pronator Teres
Pronator Quadratus
Supinator
Objectives
Bones, bony landmarks and joint Muscles Movements
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
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
FLEXION
Superior movement of the forearm in the sagittal plane
FLEXION
FLEXION
Biceps brachii Brachialis Brachioradialis Pronator teres
EXTENSION
Inferior movement of the foremarm in the sagittal plane
EXTENSION
EXTENSION
Triceps Long head also extends the shoulder
Anconeus
PRONATION Internal rotary movement of the palm to the
down position
Pronator Quadratus
PRONATION
Supinated position
PRONATION
Brachioradialis Pronator teres Pronator quadratus
SUPINATION External rotary movement of the palm to the up
position
Supinator
SUPINATION
Supinated position
SUPINATION
Pronated position
SUPINATION
Biceps brachii Brachioradialis Supinator