Human Anatomy: Upper Limb Bones

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Questions and Answers

What anatomical structure forms the pointed portion of the elbow?

Cylindrical head

Inferiorly rounded region

Distal wrist projection

Coronoid process (correct)

Which description accurately characterizes the distal structure at the wrist?

Projects posteriorly

Thick and rounded

Forms a long ridge

Diminishes in diameter (correct)

In relation to the coronoid process, where does the head lie?

Superiorly at the elbow

Inferiorly at the wrist (correct)

Lateral to the shoulder

Proximally on the arm

How does the diameter of the distal wrist structure change?

Diminishes in diameter Signup and view all the answers

What is a long ridge feature of the anterior side of a specific anatomical structure?

Coronoid process Signup and view all the answers

Which bone is NOT part of the upper limb used for differentiation between the right and left sides?

Femur Signup and view all the answers

What feature is NOT commonly used to characterize the humerus?

Coronoid process Signup and view all the answers

Which characteristic is unique to the radius when compared to the ulna?

Has a styloid process Signup and view all the answers

Which of the following is a distinguishing feature between left and right scapulae?

Orientation of the glenoid cavity Signup and view all the answers

Which bone is characterized by its articulations that do NOT include the axial skeleton?

Scapula Signup and view all the answers

What anatomical part becomes detached when a patient has difficulty raising their arm above the head?

The medial border of the scapula Signup and view all the answers

What is primarily impaired when a patient cannot rotate the scapula properly?

Movement of the shoulder girdle Signup and view all the answers

Which symptom is indicative of scapular dyskinesis related to arm elevation?

Difficulty keeping the scapula applied to the chest wall Signup and view all the answers

What functional capability is hindered when the scapula cannot properly rotate during arm elevation?

Full range of motion above the head Signup and view all the answers

What is the shape of the head of the proximal end of the humerus?

Spherical Signup and view all the answers

What movement is primarily affected in the shoulder girdle as a result of scapular dysfunction?

Elevation of the arm Signup and view all the answers

Which of the following statements correctly reflects the proximal end of the humerus?

It has a smooth head that articulates with the glenoid cavity. Signup and view all the answers

In what location is the humerus considered the largest bone?

In the upper limb Signup and view all the answers

What anatomical feature does the head of the humerus interact with?

The glenoid cavity of the scapula Signup and view all the answers

Which part of the humerus is referred to as the body?

Shaft Signup and view all the answers

What is the main function of the cervicoaxillary canal?

To contain nerves supplying the upper limb Signup and view all the answers

What characterizes the inferior surface of the clavicle?

It is rough due to ligament attachments Signup and view all the answers

Which joint does the clavicle form with the acromion of the scapula?

Acromioclavicular joint Signup and view all the answers

Which region of the clavicle is most vulnerable to fractures?

The junction of the middle and lateral thirds Signup and view all the answers

What is the correct anatomical designation for the ends of the clavicle?

Sternal and acromial Signup and view all the answers

What happens to the lateral fragment of the clavicle after a fracture?

It drops because of the weight of the upper limb Signup and view all the answers

What is the anatomical shape of the scapula?

Triangular and flat Signup and view all the answers

How many articulations does the clavicle possess?

Three Signup and view all the answers

What description fits the body (shaft) of the clavicle?

Doubly curved Signup and view all the answers

Study Notes

Upper Limb Bones

Differentiate the bones of the upper limb, including their unique features and right vs. left sides.
Focus on the elbow region: thick processes form the pointed portion; the coronoid process projects anteriorly.
The head of the humerus lies distally at the wrist, reducing in diameter.

Clavicle

The clavicle consists of two ends (sternal and acromial), a doubly curved body, and two surfaces (superior and inferior).
Sternal (medial) end is enlarged and triangular, while the acromial (lateral) end is flattened.
Articulates with the manubrium of the sternum (sternoclavicular joint), acromion of the scapula (acromioclavicular joint), and the first rib (costoclavicular joint).
Covered with smooth cartilage where joints form to allow for smooth articulation.

Clavicle Fractures

Commonly fractured, especially in children due to falls on an outstretched hand.
Fracture typically occurs at the junction of the middle and lateral thirds.
Medial fragment elevates due to the sternomastoid muscle; the lateral fragment drops due to upper limb weight.

Scapula

The scapula, or shoulder blade, is a triangular flat bone, regarded as the largest bone of the upper limb.
Provides attachment points for muscles and ligaments.
Symptoms of dysfunction include difficulty raising the arm above the head, indicating issues with scapular rotation and positioning.

Humerus

The proximal end features a smooth head that forms one-third of a sphere to articulate with the glenoid cavity of the scapula.

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Description

This quiz focuses on the anatomy of the upper limb, specifically the different bones and their unique characteristics. You will learn to identify and differentiate between the bones on the right and left sides. Test your knowledge on this essential aspect of human anatomy!