The Elbow

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					Chapter 6
Overview
 Bony anatomy
 Joints at the elbow
 Movements at the elbow
 Muscular anatomy
Bony Anatomy
     Humerus
       Medial & lateral
        epicondyles
       Capitulum
       Trochlea
Bony Anatomy
    Radius
      Lateral (thumb side)
      Radial head
      Radial (biceps)
       tuberosity
Bony Anatomy
   Ulna
     Olecranon process
     Coronoid process
     Ulnar tuberosity
Bony Anatomy
 Ulna
 Radius
     Crosses over ulna
     during pronation
Joints at the Elbow
   Humeroulnar
     Ginglymus
      ○ Hinge
     Which plane/axis?
     Olecranon process of
     ulna provides
     stability in extension,
     but does not “lock”
     into olecranon fossa
     of humerus
Joints at the Elbow
   Radioulnar
     Trochoid
      ○ Pivot
     Which plane/axis?
     Annular ligament
     encircles radial head
     but allows the radius
     to “spin” (pronate &
     supinate)
Movements at the Elbow
     Flexion and
      extension at the
      humeroulnar
      joint
Movements at the Elbow
     Pronation and
      supination at the
      radioulnar joint
Muscular Anatomy
   Anterior group
       Biceps brachii
       Brachialis
       Brachioradialis
       Pronator teres
       Pronator quadratus
   Posterior group
     Triceps
     Anconeus
     Supinator
Anterior Group: Biceps Brachii
   O:
     Long head: superior
      glenoid
     Short head: coracoid
 I: Radial tuberosity
 A: Elbow flexion &
  supination, shoulder
  flexion
 N: Musculocutaneous
    Anterior Group: Brachialis
 O: Distal humerus
 I: Proximal ulna
 A: Elbow flexion
 N:
  Musculocutaneous
Anterior Group: Brachioradialis
 O: Lateral distal
  humerus
 I: Distal radius at
  the lateral styloid
  process
 A: Elbow flexion
 N: Radial
Anterior Group: Pronator Teres
 O: Medial distal
  humerus (condyle)
  & ulna
 I: Lateral radius,
  middle 1/3
 A: Elbow pronation
  & flexion
 N: Median
Anterior Group: Pronator
Quadratus
 O: Distal anterior
  ulna
 I: Distal anterior
  radius
 A: Pronation
 N: Median
         Posterior Group: Triceps Brachii
   O:
     Long head: infraglenoid
      lip of scapula
     Lateral head: posterior
      humerus
     Medial head: medial
      posterior humerus
   I: Olecranon process
   A: Elbow extension,
    shoulder extension
   N: Radial
    Posterior Group: Anconeus
 O: Posterior
  humerus, lateral
  condyle
 I: Olecranon
  process
 A: Elbow extension
 N: Radial
Posterior Group: Supinator
 O: Lateral
  epicondyle of
  humerus
 I: Lateral proximal
  radius
 A: Supination
 N: Radial
Motion Analysis Project
 Form FOUR groups
 Develop a team name
 Select a sport movement that is
  agreeable to all members of the group
 Appoint the following team members:
       Director of Research
       Director of Written Project
       Director of Presentation
       Production Assistant

				
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