Ch.6 Flashcards
T/F Elbow joint movements ≠ radioulnar joints movements ≠ wrist movements
True
What type of joint is elbow joint?
Ginglymus or hinge-type joint
Bony landmarks in elbow (Msr,Op,Cp,Rt)
• Medial supracondylar ridge
• Olecranon process
• Coronoid process
• Radial tuberosity
Only movements from elbow joint
Only flexion and extension
2 interrelated joints in elbow joint and which is primary?
• Humeroulnar joint -Primary elbow movements
• Radiohumeral joint
T/F Radial head has a relatively small amount of contact with
humerus
True
What is considered full extension in elbow joint?
olecranon process is received by olecranon fossa
T/F Joint stability increases as elbow flexes
False
• ↑ joint stability in full extension
• ↓ joint stability as elbow flexes
What is considered full flexion?
coronoid process fits into
coronoid fossa
T/F Stability in elbow flexion is primarily independent on the radial collateral ligament (RCL) and the ulnar collateral ligament (UCL)
False, dependent
T/F Females commonly have ↑ carrying angle than men
True
Type of joint of radioulnar joint
Trochoid or pivot-type joint
• Radial head rotates at _____ulna
• Distal radius rotates around
____ ulna
Proximal; distal
What ligament maintains radial head in its joints?
Annular
Movements of elbow joint
Flexion and extension
Radioulnar movements
Pronation - internal rotary movement involving palms down
Supination - external rotary movement involving palms up
Primarily damaged ligament
ulnar collateral ligament (UCL)
Two epicondyle elbow injuries
• Lateral epicondylitis: tennis elbow -Associated with gripping and lifting activities
• Medial epicondylitis: golfer’s elbow -Less common of a problem near the medial
epicondyle
What are the three nerves where all elbow and radioulnar joints are innervated from?
Median, musculotaneous, and radial nerves of the brachial plexus
Anterior muscles primarily known for flexion and supination
• Biceps brachii
• Brachialis
• Brachioradialis
• Pronator teres
• Pronator quadratus
Posterior muscles primarily known for extension and pronation
• Triceps brachii
• Anconeus
• Supinator
O&I of biceps brachii
• O: scapula (glenoid &
coracoid)
• I: radius
O&I of brachialis muscle
• O: humerus
• I: ulna
O&I of the Brachioradialis muscle
• O: humerus
• I: radius
O&I of triceps brachii muscle
• O: scapula and humerus
• I: ulna
O&I of anconeus muscle
• O: humerus
• I: ulna
O&I of pronation teres muscle
O: humerus and ulna
I: Radius
O&I of pronator quadratus muscle
• O: ulna
• I: radius
O&I supinator muscle
O: humerus and ulna
• I: radius
Elbow flexion agonists
• Biceps brachii
• Brachialis
• Brachioradialis
Elbow extension agonists
• Triceps brachii
• Anconeus
Radioulnar pronation
• Pronator teres
• Pronator quadratus
• Brachioradialis
Radioulnar supination agonists
• Biceps brachii
• Supinator
• Brachioradialis
