The Elbow and Forearm Complex. Joints of the Elbow and Forearm.
The Elbow and Radioulnar Joints
description
Transcript of The Elbow and Radioulnar Joints
The Elbow and Radioulnar Joints
Anatomy and Kinesiology420:024
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