Podcast
Questions and Answers
Which of the following are motions of the elbow?
Which of the following are motions of the elbow?
- Pronation (correct)
- Flexion (correct)
- Supination (correct)
- Extension (correct)
What type of joint is the elbow for flexion and extension?
What type of joint is the elbow for flexion and extension?
Hinge joint
What type of joint is responsible for supination and pronation?
What type of joint is responsible for supination and pronation?
Pivot joint
What are the three bones of the elbow?
What are the three bones of the elbow?
What is the medial ligament called on the elbow?
What is the medial ligament called on the elbow?
What is the lateral ligament called on the elbow?
What is the lateral ligament called on the elbow?
What is the job of the annular ligament in the elbow?
What is the job of the annular ligament in the elbow?
What is the main supinator of the elbow?
What is the main supinator of the elbow?
What do the biceps brachii help with?
What do the biceps brachii help with?
What is the main extensor of the elbow?
What is the main extensor of the elbow?
Which muscles attach to the medial epicondyle?
Which muscles attach to the medial epicondyle?
What muscles are known as the wrist flexors?
What muscles are known as the wrist flexors?
Which muscles attach to the lateral epicondyle?
Which muscles attach to the lateral epicondyle?
What muscles are considered the extensors of the wrist?
What muscles are considered the extensors of the wrist?
What is the function of the capitellum?
What is the function of the capitellum?
Where are the medial and lateral epicondyles located?
Where are the medial and lateral epicondyles located?
What is the ulnar nerve on the elbow commonly referred to as?
What is the ulnar nerve on the elbow commonly referred to as?
Where is the ulnar nerve located on the elbow?
Where is the ulnar nerve located on the elbow?
What two nerves are protected on the elbow?
What two nerves are protected on the elbow?
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Study Notes
Elbow Motions
- Elbow allows four primary motions: flexion, extension, pronation, and supination.
Joint Types
- The elbow's joint for flexion and extension is a hinge joint, allowing movement primarily in one plane.
- Supination and pronation occur at a pivot joint, enabling rotation of the forearm.
Bones of the Elbow
- Three main bones form the elbow structure: humerus, radius, and ulna.
Ligaments
- The medial ligament of the elbow is known as the UCL (ulnar collateral ligament) or MCL (medial collateral ligament) and is prone to tears.
- The lateral ligament is referred to as RCL (radial collateral ligament) or LCL (lateral collateral ligament) and is more resilient against tears.
Annular Ligament
- The annular ligament secures the radius and ulna together by encircling the radius.
Primary Muscles
- The biceps brachii serves as the main supinator, aiding in flexion and supination of the forearm.
- The triceps brachii acts as the primary extensor of the elbow.
Epicondyles and Muscle Attachment
- Muscles associated with the medial epicondyle include those supporting the MCL or UCL.
- Wrist flexors also attach to the medial epicondyle.
- Muscles that attach to the lateral epicondyle include LCL and other superficial extensor muscles.
- Extensors of the wrist are associated with the LCL and superficial extensor muscles.
Functionality of the Capitellum
- The capitellum allows for smooth bending of the elbow.
Epicondyles Location
- Medial and lateral epicondyles are located on the humerus.
Ulnar Nerve
- Commonly referred to as the “funny bone,” the ulnar nerve is situated at the back (posterior side) of the elbow near the skin surface.
Nerve Protection
- The median nerve and radial nerve are both protected at the elbow joint, crucial for avoiding injury during movement.
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