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Questions and Answers
What is the function of the deltoid muscle in the upper limb?
What is the function of the deltoid muscle in the upper limb?
What is the type of joint between the scapula and thoracic cage?
What is the type of joint between the scapula and thoracic cage?
What is the main artery of the upper limb?
What is the main artery of the upper limb?
What is the function of the median nerve in the upper limb?
What is the function of the median nerve in the upper limb?
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What is the type of joint between the radius and ulna?
What is the type of joint between the radius and ulna?
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What is the function of the triceps brachii muscle in the upper limb?
What is the function of the triceps brachii muscle in the upper limb?
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What is the network of nerves formed by the C5-T1 spinal nerves?
What is the network of nerves formed by the C5-T1 spinal nerves?
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What is the type of joint between the metacarpals and phalanges?
What is the type of joint between the metacarpals and phalanges?
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Study Notes
Upper Limb Structure
- The upper limb consists of the scapula, humerus, radius, ulna, carpals, metacarpals, and phalanges.
- The scapula is a flat, triangular bone that forms the posterior wall of the thoracic cage.
- The humerus is the longest bone in the upper limb, extending from the scapula to the elbow.
Joints of the Upper Limb
- Scapulothoracic joint: a plane joint between the scapula and thoracic cage.
- Glenohumeral joint: a ball-and-socket joint between the scapula and humerus.
- Elbow joint: a hinge joint between the humerus and radius/ulna.
- Radioulnar joints: pivot joints between the radius and ulna.
- Wrist joint: a condyloid joint between the radius/ulna and carpals.
- Metacarpophalangeal joints: condyloid joints between the metacarpals and phalanges.
- Interphalangeal joints: hinge joints between the phalanges.
Muscles of the Upper Limb
- Deltoid: abducts the arm
- Biceps brachii: flexes the forearm
- Triceps brachii: extends the forearm
- Forearm muscles: flex, extend, and rotate the wrist and fingers
- Intrinsic muscles of the hand: flex, extend, and rotate the fingers
Nerve Supply of the Upper Limb
- Brachial plexus: a network of nerves formed by the C5-T1 spinal nerves.
- Axillary nerve: supplies the deltoid muscle.
- Radial nerve: supplies the extensor muscles of the forearm.
- Median nerve: supplies the flexor muscles of the forearm and hand.
- Ulnar nerve: supplies the flexor carpi ulnaris and flexor digitorum profundus muscles.
Blood Supply of the Upper Limb
- Subclavian artery: the main artery of the upper limb.
- Axillary artery: a continuation of the subclavian artery.
- Brachial artery: a branch of the axillary artery.
- Radial and ulnar arteries: branches of the brachial artery that form the palmar arches.
Upper Limb Structure
- The upper limb consists of scapula, humerus, radius, ulna, carpals, metacarpals, and phalanges.
- Scapula is a flat, triangular bone forming the posterior wall of the thoracic cage.
- Humerus is the longest bone in the upper limb, extending from the scapula to the elbow.
Joints of the Upper Limb
- Scapulothoracic joint is a plane joint between the scapula and thoracic cage.
- Glenohumeral joint is a ball-and-socket joint between the scapula and humerus.
- Elbow joint is a hinge joint between the humerus and radius/ulna.
- Radioulnar joints are pivot joints between the radius and ulna.
- Wrist joint is a condyloid joint between the radius/ulna and carpals.
- Metacarpophalangeal joints are condyloid joints between the metacarpals and phalanges.
- Interphalangeal joints are hinge joints between the phalanges.
Muscles of the Upper Limb
- Deltoid muscle abducts the arm.
- Biceps brachii muscle flexes the forearm.
- Triceps brachii muscle extends the forearm.
- Forearm muscles flex, extend, and rotate the wrist and fingers.
- Intrinsic muscles of the hand flex, extend, and rotate the fingers.
Nerve Supply of the Upper Limb
- Brachial plexus is a network of nerves formed by the C5-T1 spinal nerves.
- Axillary nerve supplies the deltoid muscle.
- Radial nerve supplies the extensor muscles of the forearm.
- Median nerve supplies the flexor muscles of the forearm and hand.
- Ulnar nerve supplies the flexor carpi ulnaris and flexor digitorum profundus muscles.
Blood Supply of the Upper Limb
- Subclavian artery is the main artery of the upper limb.
- Axillary artery is a continuation of the subclavian artery.
- Brachial artery is a branch of the axillary artery.
- Radial and ulnar arteries are branches of the brachial artery that form the palmar arches.
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Description
This quiz covers the bones and joints of the upper limb, including the scapula, humerus, radius, and more. Learn about the structure and function of these important body parts.
