Elbow, wrist and hand
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- Created by: LM
- Created on: 09-11-16 15:40
What three joints make up the elbow joint capsule?
Humeroulnar, humeroradial and proximal radioulnar
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What type of joint is the elbow joint?
Hinge joint
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How is the elbow joint formed?
Articulation of semilunar notch of ulna and trochlea of humerus
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What are the positions of the radius and ulna relative to each other?
Radius lateral and ulna medial
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The humeroradial joint is often termed as a gliding joint, what is it jore accurately described as?
Restricted ball and socket joint
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How is the humeroradial joint formed?
Articulation between capitulum of humerus with head of radius
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What restricts movement in the humeroradial joint?
Annular ligament
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How is the proximal radioulnar joint formed?
Articulation of head of radius with the radial fossa on ulna
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Which movements occur at the proximal radioulnar joint?
Pronation and supination
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What are the typical carrying angles of the elbow joint in men and women?
10-15 in men and 20-25 in women
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What ligaments are involved in the stability of the elbow joint?
Ulnar collateral ligament, radial collateral ligament and annular ligament
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What are the elbow flexor muscles?
Brachialis, biceps brachii, brachioradialis and pronator teres
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What are the elbow extensor muscles?
Triceps brachii and anconeus
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What are the elbow pronator muscles?
Pronator teres and pronator quadratus
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What are the elbow supinator muscles?
Supinator and biceps brachii
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What are the origins of Brachialis?
Shaft of the humerus anterior aspect
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What are the insertions of Brachialis?
Coronoid process and tuberosity of ulna
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What are the origins of Biceps Brachii long head?
Supraglenoid tubercle and superior glenoid rim of scapula
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What are the origins of Biceps Brachii short head?
Coronoid process pf scapula
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What are the insetions of Biceps Brachii?
Radial tuberosity and bicipital aponeurosis
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What are the origins of Brachioradialis?
Lateral supraconylar ridge of humerus
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What are the insetions of Brachioradialis?
Styloid process of radius
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What are the origins of pronator teres?
Common flexor tendon into the medial epicondyle of the humerus and the corocoid process of the ulna
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What are the insertions of pronator teres?
Lateral surface of the shaft of the radius
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What are the is the origin of the long head of triceps brachii?
Infraglenoid tubercle of scapula
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What are the origins of the medial and lateral heads of triceps brachii?
Medial and lateral shafts of the humerus
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What are the origins of aconeus?
Lateral epicondyle of the humerus
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What are the insertions of the aconeus?
Shaft and olecranon of the ulna
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What are the origins of pronator quadratus?
Oblique ridge of the shaft of the ulna
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What are the insertions of pronator quadratus?
Anterior surface of the shaft of the humerus
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What are the origins of supinator?
Lateral epicondyle of the humerus, fossa and supinator crest of ulna, radial and collateral ligaments
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What are the insertions of supinator?
Lateral surface of the shaft of the radius
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What type of joint is the distal radioulnar joint?
Pivot joint
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What is the function of the distal radioulnar joint?
Allows for radius to rotate around the ulna during pro/supination
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How are the radius and ulna joined?
Ligamentous syndarthrosis
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What type of joint is the radiocarpal joint?
Condyloid joint
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What are the functions of the radiocarpal joint?
Flexion, extension, radial and ulnar deviation
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What types of joints are the midcarpal and intercarpal?
Diarthrodial joints- adds up to produce modified hinge type joint
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What type of joints are the carpometacarpal joints?
Modified saddle joints
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How are the metacarpophalangeal joints formed?
Articulation between metacarpal and proximal phalanx.
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What type of joint is the metacarpophalangeal joint?
Condyloid joint
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What type of joints are the interphalangeal joints?
Hinge joints
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How many interphalangeal joints does the thumb have?
One
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What are the names of the wrist flexors?
Flexor carpi ulnaris, flexor carpi radialis, Flexor digitorum superficialis
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What is the common flexor origin?
The medial epicondyle
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Where are the wrist extensors located?
The posterior aspect of the forearm
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Where do the wrist extensors originate?
At the lateral epicondyle
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What muscles are involved in radial deviation?
Extensor carpi radialis longis and brevis along with flexor carpi radialis
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What muscles are involved in ulnar deviation?
Flexor carpi ulnaris working with extensor carpi ulnaris
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The humeroulnar joint is what type of joint?
Hinge joint
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How is the humeroulnar joint formed?
Articulation of semilunar notch of ulna and trochlea of humerus
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Actions of Brachialis
Flexes the elbow
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Actions of Biceps Brachii
Supination, flexion of elbow, flexion of shoulder
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Actions of Brachioradialis
Flexes elbow with forearm in neutral position, supinates radioulnar joint
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Actions of Triceps brachii
Extensor of elbow joint, long head weak shoulder extensor, contributes inferior stability of shoulder joint
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Actions of Aconeus
Assists elbow extension
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Actions of Pronator teres
Forearm pronation
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Actions of Supinator
Forearm supination
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What muscles are the wrist flexors assisted by?
Palmaris longus (not always present), flexor pollicis longus (FPL) and flexor digitorum profundus (FDP)
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What are the names of the wrist extensors?
Extensor carpi ulnaris (ECU); Extensor carpi radialis longus (ECRL); Extensor carpi radialis brevis (ECRB) Extensor digitorum (ED); Assisted by pollicis longus, extensor indicies and extensor digiti minimi
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Other cards in this set
Card 2
Front
Hinge joint
Back
What type of joint is the elbow joint?
Card 3
Front
Articulation of semilunar notch of ulna and trochlea of humerus
Back
Card 4
Front
Radius lateral and ulna medial
Back
Card 5
Front
Restricted ball and socket joint
Back
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