Podcast
Questions and Answers
How many bony articulations are contained within the elbow complex?
How many bony articulations are contained within the elbow complex?
Which type of joint is the humero-ulnar and humero-radial joint?
Which type of joint is the humero-ulnar and humero-radial joint?
What provides the most structural strength to the elbow joint?
What provides the most structural strength to the elbow joint?
The capitulum of the humerus articulates with the.....
The capitulum of the humerus articulates with the.....
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When does the coronoid process fit into the coronoid fossa?
When does the coronoid process fit into the coronoid fossa?
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Which ligaments contribute to the structural strength of the elbow joint?
Which ligaments contribute to the structural strength of the elbow joint?
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Which muscle is responsible for the flexion of digits 2 to 5?
Which muscle is responsible for the flexion of digits 2 to 5?
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Which muscle is involved in the extension of thumb?
Which muscle is involved in the extension of thumb?
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Which muscle is involved in the opposition of digits V?
Which muscle is involved in the opposition of digits V?
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What muscle is involved in the extension of digits 2 to 5?
What muscle is involved in the extension of digits 2 to 5?
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Which muscle performs the abduction of digits 2 to 5?
Which muscle performs the abduction of digits 2 to 5?
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Which ligament is attached to the styloid process of the radius and the scaphoid bone?
Which ligament is attached to the styloid process of the radius and the scaphoid bone?
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Which joint has a synovial saddle joint with 3 degrees of freedom?
Which joint has a synovial saddle joint with 3 degrees of freedom?
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Which muscle is NOT involved in wrist flexion?
Which muscle is NOT involved in wrist flexion?
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How many degrees of flexion do the PIP joints of digits 2-5 have?
How many degrees of flexion do the PIP joints of digits 2-5 have?
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What type of joint are the metacarpophalangeal joints?
What type of joint are the metacarpophalangeal joints?
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How many degrees of flexion does the interphalangeal (IP) joint of the thumb have?
How many degrees of flexion does the interphalangeal (IP) joint of the thumb have?
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Which muscles are acting on the thumb's MCP joint?
Which muscles are acting on the thumb's MCP joint?
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What is the range of motion for MCP hyperextension of the thumb?
What is the range of motion for MCP hyperextension of the thumb?
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What is the carrying angle of the elbow, and why do women typically have a more pronounced angle?
What is the carrying angle of the elbow, and why do women typically have a more pronounced angle?
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What is cubitus varus and cubitus valgus?
What is cubitus varus and cubitus valgus?
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What is the range of motion for active flexion at the elbow joint?
What is the range of motion for active flexion at the elbow joint?
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What type of joint is the proximal (superior) radio-ulnar joint?
What type of joint is the proximal (superior) radio-ulnar joint?
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What allows for the movements of supination and pronation at the elbow joint?
What allows for the movements of supination and pronation at the elbow joint?
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Which joint allows for abduction/adduction and flexion/extension motions with a possible rotation of 15° to 20° due to joint laxity?
Which joint allows for abduction/adduction and flexion/extension motions with a possible rotation of 15° to 20° due to joint laxity?
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Which type of joint are the 2nd to 5th carpometacarpal (CMC) joints?
Which type of joint are the 2nd to 5th carpometacarpal (CMC) joints?
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What type of joint are the interphalangeal (IP) joints in the hand?
What type of joint are the interphalangeal (IP) joints in the hand?
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Which muscles are involved in wrist adduction?
Which muscles are involved in wrist adduction?
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Which ligaments contribute to the structural strength of the radio-carpal joint?
Which ligaments contribute to the structural strength of the radio-carpal joint?
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Which joint is a synovial planar joint between the proximal and distal rows of carpal bones ?
Which joint is a synovial planar joint between the proximal and distal rows of carpal bones ?
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What is the carrying angle of the elbow?
What is the carrying angle of the elbow?
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Which muscle is mainly responsible for the extension of the elbow?
Which muscle is mainly responsible for the extension of the elbow?
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What is the function of the supinator and pronator muscles at the elbow joint?
What is the function of the supinator and pronator muscles at the elbow joint?
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What is cubitus varus?
What is cubitus varus?
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What is the range of motion for elbow extension?
What is the range of motion for elbow extension?
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What is the function of the middle radioulnar joint?
What is the function of the middle radioulnar joint?
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Which of the following ligaments supports the articulation of the head of the radius with the radial notch of ulna?
Which of the following ligaments supports the articulation of the head of the radius with the radial notch of ulna?
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The axis for flexion/extension of the elbow is not ________ to the humeral shaft
The axis for flexion/extension of the elbow is not ________ to the humeral shaft
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The medial and lateral collateral ligaments of the elbow are considered extrinsic ligaments
The medial and lateral collateral ligaments of the elbow are considered extrinsic ligaments
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The short head of triceps is the strongest out of all 3 heads
The short head of triceps is the strongest out of all 3 heads
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The mid-carpal joint is a synovial planar joint between the distal and proximal rows of carpal bones except for _______ (which carpal bone?)
The mid-carpal joint is a synovial planar joint between the distal and proximal rows of carpal bones except for _______ (which carpal bone?)
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The intercarpal and midcarpal joints are both synovial ______ joints (what type?)
The intercarpal and midcarpal joints are both synovial ______ joints (what type?)
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What is the purpose of the articular disk in the distal radio-ulnar joint?
What is the purpose of the articular disk in the distal radio-ulnar joint?
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A hole in the articular disk can lead to.....
A hole in the articular disk can lead to.....
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The palmar and dorsal _________ ligaments support the radio-ulnar joint
The palmar and dorsal _________ ligaments support the radio-ulnar joint
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The radiocarpal joint is supported by....
The radiocarpal joint is supported by....
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The radiocarpal (lateral) ligaments are relaxed during _________(what type of movement?)
The radiocarpal (lateral) ligaments are relaxed during _________(what type of movement?)
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Which of the following radio-carpal ligaments are stretched during extension?
Which of the following radio-carpal ligaments are stretched during extension?
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Study Notes
Elbow Joint Anatomy and Function
- The proximal ends of the two bones of the forearm have surfaces that correspond to those of the humerus for articulation.
- The elbow joint has two functional joints: the true elbow joint and the superior radioulnar joint.
- The carrying angle of the elbow ranges from 5° to 19°, with women typically having a more pronounced angle due to wider pelvic girdle.
- Cubitus varus is a deformity in which the extended forearm is deviated towards the midline of the body, while cubitus valgus is a deformity in which the elbow is turned outwards.
- The elbow joint is supported by ligaments, including the medial and lateral collateral ligaments, and anterior ligaments.
- The extension of the elbow depends mainly on the triceps brachii, while flexion involves the brachialis, brachioradialis, and biceps brachii muscles.
- The range of motion for elbow extension is 0°, with active flexion having a range of 145° and passive flexion 160°.
- The proximal (superior) radio-ulnar joint is a synovial pivot joint with cylindrical surfaces that allows rotation about the axis of the two cylinders in contact.
- The inferior (distal) radio-ulnar joint is a synovial pivot joint with one degree of freedom for rotation and is supported by the articular disc and ligaments.
- The middle radioulnar joint is a ligamentous connection, the interosseous membrane, which lies between the bodies of the radius and ulna.
- The supinator and pronator muscles allow for the movements of supination and pronation at the elbow joint.
- The elbow joint complex functions to stabilize the elbow and proximal attachments of the dynamometer finger and wrist muscles, and to maximize the force produced at the fist.
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Description
Test your knowledge of the anatomy and function of the elbow joint, including its bony features, ligament support, muscle involvement, and range of motion. Learn about common deformities and the joints associated with the elbow complex.
