KIN: Elbow 1/2 Word Scramble
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Question | Answer |
What type of joint is the elbow joint? | Hinge |
What side of the humerus is the trochlea on? | Medial |
Where is one of the thinnest areas of cartilage in the human body? | Elbow joint |
Where is the coronoid fossa located? | Above the trochlear groove |
What bone articulates with the trochlea? | Ulna |
What bone articulates with the capitulum? | Radius |
Where is the radial fossa located? | Above capitulum |
Where does the biceps brachii insert? | Bicipital tuberosity |
How is the radial articulation with the humerus typically fractured? | FOOSH |
Arthrokinematics of HUJ? | Roll and slide same (Concave on convex) |
Is there much contact in the HRJ at rest in full extension? | No |
What type of joint does the HRJ act like during pronation/supination? | Pivot |
Arthrokinematics for HRJ | Roll and slide same (Concave on convex) |
Does the elbow have very good dynamic stability? | No |
What does the elbow rely on? | Static constraints |
What makes up the elbow stability? | Articular surface - 50% Collateral ligaments - 50% |
Is injury more common to MCL or LCL of elbow? | MCL |
Where does the anterior part of the MCL attach?? | Coronoid process of ulna |
What is the primary stabilizer to valgus stress from 20 - 120 degrees? | Anterior part of MCL |
Which part of the MCL stays on the ulna? | Oblique |
Which band of the MCL is the strongest and stiffest? | Anterior |
When do the posterior fibers become taut? | Deep flexion |
When are the majority of the MCL fibers taut? | Extension |
Does the MCL complex originate at the center of the axis of elbow rotation? | No |
How is the MCL shaped? | Triangular |
How is the LCL shaped? | Fan-shaped |
Which is stronger, MCL or LCL? | MCL |
Where does the LCL run? | Lateral epicondyle of humerus to annular ligament and olecranon process |
Does the LCL complex lie in the center of the joint axis? What does this mean? | Yes Consistent length throughout ROM |
What motions increase tension on the MCL-A? | Valgus Extension>Flexion |
What motions increase tension on MCL-P? | Valgus Flexion |
What motions increase tension on LCL-RC? | Varus |
What motions increase tension on LCL-LUC? | Varus Flexion |
What motions increase tension on Annular? | Distraction of radius |
50% resectino of olecranon process does what for stability? | Decreases |
What are the flexors of the elbow? | Biceps Brachialis Brachioradialis |
What are the extensors of the elbow? | Triceps Anconeus |
O of biceps brachii? | SH - corocoid process LH - supraglenoid tubercle |
I of biceps brachii? | Biceps tuberosity |
Where will the biceps brachii have maximal EMB? | Simultaneous supination and flexion |
O of brachialis? | Anterior surface of lower portion of humeral shaft |
I of brachialis? | Coronoid process of proximal ulna |
Where is the brachialis in relation to biceps brachii? | Deep |
What muscle has the largest cross sectional area of any elbow mucle? | Brachialis |
What is the primary elbow flexor? | Brachialis |
O of brachioradialis? | Lateral supracondyler ridge of distal lateral 2/3 of humerus |
I of brachiradialis? | Lower end of radius just proximal to styloid process |
Do motions of pronation or supination have an effect on brachialis? Why/Why not? | No Because of the attachment to distal ulna |
What position should your arm be in to check biceps brachii? | Supination |
What position should your arm be in to check brachioradialis? | Neutral |
What position should your arm be in to check brachiallis? | Pronation |
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