Elbow, wrist and hand Flashcards
Function of the elbow
to shorten the length of the arm
to allow the hand to be moved towards and away from the body
holds elbow at 90 degrees
Bones that make up the elbow?
Humerus
Radius
Ulna
Humero-ulnar joint
Bones
Joint type
Movement
Bones - humerus and ulnar
Joint type - hinge
Movements - flexion/extension
Humero-radial joint
Bones
Joint type
Movement
Bones: humerus and radius
joint type: hinge
Movements: flexion/extension
Where is the synovial membrane for the elbow attached?
Attaching to the articular margins of the humerus and ulna lining the joint capsule, reflected onto the humerus to cover the coronoid and radial fossae anteriorly and the olecranon fossa posteriorly.
What is the posterior fat pad of the elbow
the visualisation of a lucent crescent of fat located in the olecranon fossa on a true lateral view of an elbow joint with the elbow flexed ata right angle indicating and elbow joint effusion.
Medial collateral ligament of the elbow.
- Runs from medial epicondyle of humerus to the medial side of coranoid process and olecranon process
- Between humerus and ulna
- Prevents side ways movement
- Resist varus and valgus strain
Lateral collateral ligament of the elbow
Attaches proximally to the lateral epicondyle and distally to the lateral ulna and annular ligament
Annular ligament of elbow
Encompasses radial head at the radial notch and hold it against the ulna
Interosseous membrane of the elbow
o Broad flat membrane is located between the radius and ulna for most of their length
o Connective fibres between ulna and radius
Ligaments of the elbow
medial collateral ligament
lateral collateral ligament
annular ligament
Elbow flexors muscles
Bicep brachia short head
bicep brachia long head
brachialis
brachioradialis
Bicep brachii (short head) origin, insertion, nerve supply. main actions
Origin: coracoid process of the scapula
Insertion: Radial tuberosity
Nerve supply: Musculocutaneous nerve
main actions: flexion, supination, abduction, internal rotation
Bicep brachii (long head) origin, insertion, nerve supply. main actions
Origin: Supraglenoid tubercle of the scapula
Insertion: Radial tuberosity
Nerve supply: musculocutaenous nerve
Main actions: flexion, supination, abduction, internal rotation
Brachialis
origin, insertion, nerve supply. main actions
origin: Distal anterior surface of the humerus
insertion: Coranoid process of the ulna
nerve supply: musuloccuntaneous nerve
main actions: Flexion,
Brachioradialis
origin, insertion, nerve supply. main actions
origin: distal lateral supracondylar ridge of the humerus and the lateral intermuscular septum
insertion: Lateral part of the styloid process of the radius
nerve supply: radial nerve
main actions: Flexion, Supination, pronation
Elbow extensor muscles
Tricep Brachii (medius) Tricep brachii (long head) Tricep brachia (lateral head) Anconeus
Tricep Brachii (medial head) origin, insertion, nerve supply. main actions
origin, Posteromedial surface of the distal humerus below the radicle groove and the medial intermuscular septum
insertion, Olecranon process of the ulna via the triceps tendon
nerve supply, radial nerve
main actions, extension
Tricep brachii (long head) origin, insertion, nerve supply. main actions
origin, Infraglenoid tubercle of the scapula
insertion, Olecranon process of the ulna via the triceps tendon
nerve supply, Radial never
main actions extension, adduction