Podcast
Questions and Answers
What is the total number of bones in the upper limb?
What is the total number of bones in the upper limb?
- 30 bones
- 32 bones (correct)
- 28 bones
- 34 bones
How many major arteries are found in the upper limb?
How many major arteries are found in the upper limb?
- 8 major arteries
- 2 major arteries
- 4 major arteries (correct)
- 6 major arteries
Which component is NOT typically included when describing the upper limb?
Which component is NOT typically included when describing the upper limb?
- Joints
- Thigh Muscles (correct)
- Arteries
- Veins
What is the approximate number of major nerves in the upper limb?
What is the approximate number of major nerves in the upper limb?
How many muscles are found in the upper limb?
How many muscles are found in the upper limb?
Which of the following is the correct number of joints in the upper limb, excluding intercarpal joints?
Which of the following is the correct number of joints in the upper limb, excluding intercarpal joints?
What anatomical structure is primarily responsible for communication within the upper limb?
What anatomical structure is primarily responsible for communication within the upper limb?
How many major veins are present in the upper limb?
How many major veins are present in the upper limb?
Which movement is NOT associated with the shoulder joint?
Which movement is NOT associated with the shoulder joint?
What is the primary function of the radioulnar joints?
What is the primary function of the radioulnar joints?
Which joints allow for adduction and abduction movements in the hand?
Which joints allow for adduction and abduction movements in the hand?
Which statement about the wrist joint is incorrect?
Which statement about the wrist joint is incorrect?
Which joint is primarily responsible for flexion and extension of the fingers?
Which joint is primarily responsible for flexion and extension of the fingers?
Which tendon is most likely to be involved in shoulder pain during initial abduction of the arm?
Which tendon is most likely to be involved in shoulder pain during initial abduction of the arm?
In cases of shoulder pain that affects arm abduction, which muscle can be implicated apart from the supraspinatus?
In cases of shoulder pain that affects arm abduction, which muscle can be implicated apart from the supraspinatus?
Which of these tendons primarily supports the supraspinatus tendon in shoulder movement?
Which of these tendons primarily supports the supraspinatus tendon in shoulder movement?
Which condition is least likely to cause pain during the initial abduction of the arm?
Which condition is least likely to cause pain during the initial abduction of the arm?
What is the most likely mechanism of injury associated with supraspinatus tendon pain?
What is the most likely mechanism of injury associated with supraspinatus tendon pain?
Which nerve supplies the anterior compartment of the arm?
Which nerve supplies the anterior compartment of the arm?
What is the main action of the posterior compartment in the forearm?
What is the main action of the posterior compartment in the forearm?
Which of the following compartments in the hand is responsible for the movement of the little finger?
Which of the following compartments in the hand is responsible for the movement of the little finger?
Which of the following nerves supplies the median and ulnar nerves in the forearm?
Which of the following nerves supplies the median and ulnar nerves in the forearm?
What is the primary bone that forms the middle segment of the upper limb?
What is the primary bone that forms the middle segment of the upper limb?
What primary action is associated with the anterior compartment of the arm?
What primary action is associated with the anterior compartment of the arm?
Which structures form the pectoral (shoulder) girdle?
Which structures form the pectoral (shoulder) girdle?
Which of the following actions is primarily performed by the muscles supplied by the radial nerve?
Which of the following actions is primarily performed by the muscles supplied by the radial nerve?
Which bones are included in the composition of the upper limb?
Which bones are included in the composition of the upper limb?
What is the total number of phalanges present in the upper limb?
What is the total number of phalanges present in the upper limb?
How many groups of bones make up the radius area in the upper limb?
How many groups of bones make up the radius area in the upper limb?
Which joint movement is associated with the elevation of the upper limb?
Which joint movement is associated with the elevation of the upper limb?
Identify the correct structure associated with the term 'cubital fossa' in the upper limb.
Identify the correct structure associated with the term 'cubital fossa' in the upper limb.
What is the role of the scapula in the upper limb structure?
What is the role of the scapula in the upper limb structure?
Which of the following is true regarding the metacarpal bones?
Which of the following is true regarding the metacarpal bones?
Which region is directly associated with the humerus?
Which region is directly associated with the humerus?
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Study Notes
Upper Limb Overview
- The upper limb consists of 32 bones, 26 joints (excluding intercarpal joints), 60 muscles, 17 major nerves, 4 main arteries (excluding branches) and 4 main veins (excluding tributaries)
Regions and Compartments
- The upper limb is divided into the arm, forearm, and hand
- The arm has anterior (flexor) and posterior (extensor) compartments
- The anterior compartment is responsible for flexion and is supplied by the musculocutaneous nerve
- The posterior compartment is responsible for extension and is supplied by the radial nerve
- The forearm also has anterior (flexor) and posterior (extensor) compartments
- The anterior compartment is responsible for flexion and is supplied by the median and ulnar nerves
- The posterior compartment is responsible for extension and is supplied by the deep radial nerve
- The hand has thenar, central, and hypothenar compartments
- The thenar compartment is responsible for thumb movement and is supplied by the median nerve
- The central compartment is responsible for finger movement and is supplied by the median and ulnar nerves
- The hypothenar compartment is responsible for little finger movement and is supplied by the ulnar nerve
Upper Limb Bones
- The upper limb is divided into four segments:
- Pectoral (Shoulder) Girdle: Consists of the clavicle (anteriorly) and scapula (posteriorly)
- Arm: Contains the humerus
- Forearm: Contains the ulna (medially) and the radius (laterally)
- Hand: Consists of three groups
- 8 carpal bones
- 5 metacarpal bones
- 14 phalanges
Upper Limb Joints
- Shoulder (Pectoral) Girdle: allows for elevation and depression of the shoulder region
- Shoulder Joint: allows for flexion, extension, adduction, abduction, medial and lateral rotation, and circumduction of the arm
- Elbow: allows for flexion and extension of the forearm
- Radioulnar Joints: allows for pronation and supination of the forearm
- Wrist Joint: allows for flexion, extension, adduction, abduction, and circumduction of the hand
- Metacarpophalangeal Joints (MCPJ): allows for flexion, extension, adduction, and abduction of the fingers
- Interphalangeal Joints (IPJ): allows for flexion and extension of the phalanges
Key Facts
- The Supraspinatus tendon is commonly affected in cases of severe pain during initial abduction of the arm.
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