118 Questions
What type of joint is the elbow joint?
Hinge joint
Which ligaments contribute to the structural strength of the elbow joint?
Radial collateral and ulnar collateral ligaments
In the elbow complex, which bony articulation involves the trochlea of the humerus?
Humero-ulnar
What movements are permitted by the typical 'elbow' joint?
Flexion and extension
Which part of the humerus has the trochlea and capitulum as articular surfaces?
Distal end
How many degrees of freedom does the elbow joint typically have?
One degree of freedom
Which ligament becomes taut during wrist flexion at the radiocarpal joint?
Posterior ligament
What type of movement at the radiocarpal joint involves the collateral ligaments?
Adduction
In wrist flexion at the radiocarpal joint, which ligament relaxes?
Anterior ligament
What is the role of the ulno-carpal ligament in wrist movement at the radiocarpal joint?
Relaxes during wrist flexion
Which muscle group is primarily involved in wrist flexion and extension?
Flexor Carpi Ulnaris and Flexor Carpi Radialis
What is the axis of abduction and adduction motions at the radiocarpal joint?
Through the head of the capitate
Which of the following muscles is NOT involved in wrist flexion?
Extensor Carpi Radialis Longus
Which of the following describes the primary motion of the carpometacarpal (CMC) joint of the thumb?
All of the above
Which of the following muscles is involved in both wrist flexion and wrist abduction?
Flexor Carpi Radialis
Which of the following statements about the carpometacarpal (CMC) joint of the thumb is NOT true?
It is a hinge joint.
Which of the following muscles is involved in wrist extension but NOT in wrist abduction?
Extensor Digiti Minimi
Which of the following statements about the carpometacarpal (CMC) joint of the thumb is true?
The joint surface of the 1st metacarpal is convex, and the joint surface of the trapezium is concave.
Which of the following muscles are responsible for flexion of digits 2 to 5?
Flexor digitorum superficialis, flexor digitorum profundus, lumbricals, dorsal interossei
What is the range of motion (ROM) for flexion of the proximal interphalangeal (PIP) joint of the fingers?
120 degrees
Which muscle group is responsible for adduction of digits 2 to 5?
Palmar interossei
What is the range of motion (ROM) for hyperextension of the thumb interphalangeal (IP) joint?
5-10 degrees
Which of the following is NOT an extrinsic muscle acting on the digits?
Adductor pollicis
In what position of the metacarpophalangeal (MCP) joint of the thumb can abduction/adduction occur?
Semiflexion
Which of the following statements about the glenohumeral (shoulder) joint is correct?
Approximately two-thirds of the humeral head fits into the glenoid fossa.
What is the primary function of the glenoid labrum in the glenohumeral joint?
To deepen the glenoid cavity and improve congruence.
Which of the following axes controls the rotational movements of the glenohumeral joint?
Vertical axis
Which of the following structures is closely related to the glenohumeral joint and may be damaged during dislocation?
Axillary nerve
Which of the following statements about the joint capsule of the glenohumeral joint is correct?
It is relatively loose, permitting free movements.
Which of the following movements of the glenohumeral joint is controlled by the antero-posterior axis?
Abduction and adduction
What is the range of motion (ROM) for the 5th carpometacarpal (CMC) joint?
25 to 30 degrees of motion
How many degrees of freedom (DOF) do the metacarpophalangeal (MCP) joints have?
2 DOF
When the MCP joint is in 90 degrees of flexion, what is the state of the collateral ligaments?
Taut
What is the range of motion (ROM) for abduction and adduction of the metacarpophalangeal (MCP) joints?
20 degrees
Which of the carpometacarpal (CMC) joints has the greatest range of motion?
5th CMC joint
What is the range of motion (ROM) for hyperextension of the metacarpophalangeal (MCP) joints?
0 degrees
What is the range of motion (ROM) for flexion of the proximal interphalangeal (PIP) joint of the fingers?
$120^{\circ}$
In what position of the metacarpophalangeal (MCP) joint of the thumb can abduction/adduction occur?
In semiflexion
Which muscle group is responsible for adduction of digits 2 to 5?
Palmar interossei
Which of the following muscles are responsible for flexion of digits 2 to 5?
Flexor digitorum superficialis and flexor digitorum profundus
What is the range of motion (ROM) for hyperextension of the thumb interphalangeal (IP) joint?
$5^{\circ} - 10^{\circ}$
What is the primary function of the transverse humeral ligament?
To convert the intertubercular groove into a canal for the long head of the biceps tendon
What is the primary function of the coracoacromial arch?
To prevent superior displacement of the humeral head from the glenoid cavity
What is the primary function of the bursae around the shoulder joint?
To decrease friction between tendons/muscles and the joint capsule
What is the primary function of the glenohumeral ligaments?
To provide structural support to the shoulder joint capsule
Where is the long head of the biceps tendon positioned within the shoulder joint?
Within the joint capsule, passing through the intertubercular groove
What is the primary function of the coracohumeral ligament?
To connect the coracoid process to the greater tubercle of the humerus
What is the primary role of the Scapulothoracic Joint?
Increases arm ROM at the Shoulder joint
Which movement will result in changes at both the acromioclavicular and sternoclavicular joints?
Adduction of the Scapula
What provides Glenohumeral stability for overhead work?
Scapulothoracic Joint
What is the main function of the Scapulothoracic Joint in relation to the Humerus?
Offers a movable base for the Humerus, enhancing arm ROM at shoulder joint
What is the significance of muscles attached to the scapula with regards to shoulder movements?
Produce movements that are dependent on acromioclavicular and sternoclavicular articulations
Which of the following muscles is NOT involved in wrist extension?
Flexor Carpi Radialis
Which motion at the carpometacarpal (CMC) joint of the thumb involves rotation of the 1st metacarpal on the trapezium?
Opposition
What is the primary function of the joint capsule at the carpometacarpal (CMC) joint of the thumb?
It is thick, but loose to allow a wide range of motion
Which of the following motions is NOT permitted at the carpometacarpal (CMC) joint of the thumb?
Circumduction
Which of the following muscles acts as a synergist for both wrist flexion and wrist abduction?
Flexor Carpi Radialis
Which of the following statements about the articular surfaces of the carpometacarpal (CMC) joint of the thumb is correct?
The surfaces have both convex and concave characteristics
Which of the following muscles is responsible for extension of the digits 2 to 5?
Extensor digitorum
Which of the following muscle groups is responsible for abduction of digits 2 to 5?
Dorsal interossei
What is the range of motion (ROM) for flexion of the metacarpophalangeal (MCP) joint of the thumb?
45 - 60 degrees
Which of the following muscles is responsible for opposition of the thumb?
Opponens pollicis
Which of the following statements about the intrinsic muscles of the hand is true?
The lumbricals are responsible for flexion of digits 2 to 5.
Which of the following muscles is involved in both wrist flexion and wrist abduction?
Flexor carpi radialis
What is the primary purpose of the articular disc in the inferior radio-ulnar joint?
To bind the radius and ulna together and separate different joints
Which ligament provides support to the middle radioulnar joint?
Interosseous membrane
How is the middle radioulnar joint defined in terms of movement?
Amphiarthrosis joint
What is the function of the thickening of the capsule as palmar (anterior) and posterior or dorsal radioulnar ligaments?
To support the joint anteriorly and posteriorly
Which muscles are responsible for Supination and Pronation movements at the forearm?
Supinator & Pronator teres
What is the degree of movement for Pronation compared to Supination at the radio-ulnar joints?
$90^\circ$ Pronation, $80^\circ$ Supination
What is the primary function of the glenoid labrum in the glenohumeral joint?
To widen the glenoid cavity and increase congruence with the humeral head
Which of the following structures is closely related to the glenohumeral joint and may be damaged during dislocation?
Axillary nerve
Which of the following axes controls the rotational movements of the glenohumeral joint?
Vertical axis
Which of the following statements about the joint capsule of the glenohumeral joint is correct?
It is least supported inferiorly, making dislocation more likely in that direction
Which of the following statements about the articular surfaces of the glenohumeral joint is correct?
The head of the humerus is much larger than the glenoid cavity
Which of the following movements of the glenohumeral joint is controlled by the antero-posterior axis?
Abduction and adduction
Which of the following joints is a physiological joint with no true articulation?
Scapulothoracic joint
Which of the following statements accurately describes the role of the scapulothoracic joint?
All of the above.
Which of the following statements regarding the relationship between the scapulothoracic joint and other shoulder joints is correct?
Any movement at the scapulothoracic joint will result in movement at both the acromioclavicular and sternoclavicular joints.
Which of the following muscles is responsible for abduction of the thumb?
Abductor pollicis longus and Abductor pollicis brevis
Which of the following muscles is responsible for opposition of the thumb?
Opponens pollicis
Which of the following muscle groups is responsible for flexion of digits 2 to 5?
Flexor digitorum profundus and Flexor digitorum superficialis
After reaching 90° abduction, the movement of the upper limb:
Brings the upper limb closer to the sagittal plane
In the position of reference, adduction of the shoulder joint is possible when combined with:
Extension and flexion
Which of the following statements about the subacromial bursa is correct?
It may become inflamed and swollen, leading to impingement
The movement of abduction takes place in which plane?
Frontal plane
What is the maximum angle of abduction that can be achieved at the shoulder joint?
180°
Which bursa is located between the deltoid and the fibrous capsule?
Subdeltoid bursa
Which of the following muscle groups is responsible for wrist adduction?
Flexor Carpi Ulnaris and Extensor Carpi Ulnaris
Which of the following motions is permitted at the carpometacarpal (CMC) joint of the thumb?
Rotation of the 1st metacarpal on the trapezium
Which muscle group is responsible for wrist abduction?
Flexor Carpi Radialis, Extensor Carpi Radialis Longus, and Extensor Carpi Radialis Brevis
Which of the following muscles is primarily responsible for opposition of the thumb?
Opponens Pollicis
Which of the following statements about the carpometacarpal (CMC) joint of the thumb is correct?
It is a saddle joint with 3 degrees of freedom
Which of the following muscles is involved in both wrist flexion and wrist abduction?
Flexor Carpi Radialis
What is the primary function of the radial collateral ligament in the elbow complex?
Provide side-to-side stability to prevent varus-valgus stress
Which ligament reinforces the distal part of the joint capsule of the elbow complex to provide additional support?
Annular ligament
In the elbow complex, what is the primary function of the trochlea of the humerus?
Participate in the formation of the humero-ulnar joint for flexion and extension
Which joint within the elbow complex permits rotational movements of the forearm?
Proximal radio-ulnar joint
What anatomical structure primarily limits hyperextension at the elbow joint?
Olecranon process of ulna
Which ligament in the elbow complex is most crucial for preventing abduction-adduction movements?
Ulnar collateral ligament
Which joint provides a movable base for the humerus, increasing the range of motion at the shoulder joint?
Scapulothoracic joint
Which muscle group is primarily responsible for abduction of the thumb?
Abductor pollicis longus and abductor pollicis brevis
Which of the following statements about the joint capsule of the glenohumeral joint is correct?
It is reinforced by the coracohumeral ligament, which provides stability to the joint.
Which muscle is primarily responsible for opposition of the thumb?
Opponens pollicis
Which of the following movements of the glenohumeral joint is controlled by the antero-posterior axis?
Abduction and adduction
What is the primary function of the glenoid labrum in the glenohumeral joint?
To increase the depth of the glenoid fossa and provide stability to the joint.
What is the range of passive flexion for the elbow joint?
160°
Which of the following structures forms a part of the proximal radio-ulnar joint?
Both the radial notch of the ulna and the annular ligament
What is the range of extension for the elbow joint from the position of reference (C)?
0°
Which of the following statements about the head of the radius is correct?
All of the above.
What type of joint is the proximal radio-ulnar joint?
A synovial pivot joint
Which of the following statements about the movement at the proximal radio-ulnar joint is correct?
It allows rotation about the axis of the two cylindrical surfaces in contact.
Which intrinsic muscle group is responsible for abduction of the little finger (digit 5)?
Abductor digiti minimi
Which extrinsic muscle primarily extends the interphalangeal joints of the thumb?
Extensor pollicis brevis
Which muscle group is responsible for flexion of the metacarpophalangeal (MCP) joint of the thumb?
Flexor pollicis brevis
What is the range of motion (ROM) for extension of the distal interphalangeal (DIP) joints of the fingers?
0 degrees
Which muscle group is primarily responsible for adduction of digits 2 to 5?
Palmar interossei
In which position of the metacarpophalangeal (MCP) joint of the thumb can abduction/adduction occur?
Semiflexion
Test your knowledge on the anatomy of the elbow, radioulnar, and hand joints as presented by Dr. M. Doroudi in BMS Anatomy lecture 10. The quiz is based on the content from Moore's Clinically Oriented Anatomy, 9th edition, focusing on the upper limb chapter pages 277-288.
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