The Elbow Flashcards
Brachialis- location, attachment and movement
Location-Distal humerus Attachment- Coronoid process of ulna Movement- Flexes in all positions
Biceps brachii- location, attachment and movement
Location-Humerus Short head- attaches to corocoid process Long head- Supraglenoid tubercle Insertes onto the Radial Tuberosity of radius Movements: Flexor and Powerful supinator
Function of Coracobrachialis
Flex and adduct shoulder Resists dislocation
Name the muscles in the posterior compartment of the arm
Triceps Anconeus
Triceps reflex nerve routes
C7,C8
Biceps reflex nerve routes
C5,C6
What does the radial nerve pass through? Which muscle does it follow
Radial spiral groove Profunda brachii
Bones which form the elbow joint?
Humerus, radius, ulna
Function of the epicondyles?
Muscle attachment
Name the two articular surfaces of the condyles. Which is larger?
Lateral- capitulum
Medial- trochlea (larger)
How many fossas are at the elbow joint? Where are they located?
3 Altogether
2 anteriorly
1 posteriorly
Which bones form the medial and lateral side of the forarm
Medial- ulna
Lateral- radius
What are the 3 joints which form the elbow joint?
- Spool-shaped trochlea of humerus with trochlear notch of ulna (humero-ulnar)
- Spheroidal capitulum of humerus with head of radius (humero-radial)
- proximal radio-ulnar joint
Name the 3 main ligaments on the elbow joint
Radial collateral ligament
Ulnar collaterla ligament
Anular ligament
Location of the anular ligament?
Wraps around the head of the radius
Which bone in the elbow is most likely to get dislocated?
Radius
Name the 3 bursae in the elbow and there location
- Intratendinous olecranon bursa
–Sometime present in triceps tendon
- Subtendinous olecranon bursa
–Between olecranon and triceps tendon
- Subcutaneous olecranon bursa
–Located in subcutaneous connective tissue
Which bursa is bursitis most likely to affect?
superficial (subcutaneous) bursa
Which mucsles flex the elbow joint?
•Chief elbow flexor
–Biceps brachii (when already flexed to 90o and supine)
–Brachialis
–Brachioradialis
(Rapid and in absence of resistance)
Which muscles extend the elbow? Which nerve innervates these mucles?
•Chief elbow extensor
–Triceps brachii
–Anconeus helps triceps to extend the forearm
•Radial Nerve
What is are the Chief supinator muscles
Biceps brachii
Supinator
What are the Chief pronator muscles? Where are they located?
–pronator teres (at the elbow)
–pronator quadratus (at wrist)
Location of the Musculocutaneous nerve
Travels between biceps and brachialis
Location of radial nerve
Posterior- radial groove
Anterior to lateral epicondyle
Location of median nerve
–Anterior compartment arm
–through cubital fossa
Location of ulnar nerve
–Anterior compartment arm
–POSTERIOR medial epicondyle
What is the blood supply of the elbow?
–Anastomosis of brachial, profunda brachii, radial & ulnar artery
Boundries of the cubital fossa
–Superior imaginary line between medial and lateral epicondyles
–Medially pronator teres
–Laterally brachioradialis
–Floor (base) brachialis and supinator
–Roof brachial and deep fascia reinforced by biciptal aponeurosis
What goes through the cubital fossa?
Median nerve
Brachial artery and vein
