Bicipital Groove Anatomy Quiz

Questions and Answers

What is the primary function of the sternoclavicular joint in relation to the upper extremity?

To increase the range of motion of the shoulder for greater reach (correct)

To provide a direct connection between the upper extremity and the lumbar spine

To facilitate the movement of the lower extremity during walking

To support the weight of the upper body during lifting movements

How many degrees of rotation occur at the sternoclavicular joint during upward and downward movements?

60 degrees (correct)

45 degrees

120 degrees

90 degrees

Which ligaments are involved in maintaining the stability of the sternoclavicular joint?

Coracoclavicular ligament and posterior SC ligament

Acromioclavicular ligament and anterior SC ligament

Costoclavicular ligament and anterior SC ligament (correct)

Posterior SC ligament and supraspinatus tendon

What type of joint movement does the sternoclavicular joint NOT facilitate?

Lateral flexion Signup and view all the answers

In terms of degrees of freedom (DOF), how many degrees of freedom does the sternoclavicular joint have?

3 DOF Signup and view all the answers

Which component of the sternoclavicular joint helps in shock absorption?

Fibrocartilage disc Signup and view all the answers

What role does the transverse rotation of the scapula at the sternoclavicular joint play?

Provides glenohumeral stability in overhead positions Signup and view all the answers

The position of the disk and clavicle at the sternoclavicular joint primarily relates to which movements?

Elevation and depression Signup and view all the answers

What characteristic shape of the shoulder girdle is described?

Pear-shaped Signup and view all the answers

What is the angular value of shoulder girdle elevation?

60 degrees Signup and view all the answers

Which ligament connects the glenoid labrum to the humeral neck?

Z ligament Signup and view all the answers

What does protraction of the shoulder girdle involve?

Movement away from the midline Signup and view all the answers

What is the maximum range of motion for upward rotation of the shoulder girdle?

Occurs with full shoulder flexion Signup and view all the answers

How far can the scapula retract in degrees?

25 degrees Signup and view all the answers

What is Sprenger's deformity characterized by?

Congenital high scapula Signup and view all the answers

What is the function of the transverse humeral ligament?

Links the lesser and greater tubercle Signup and view all the answers

What is the angular value of shoulder girdle depression?

5-10 degrees Signup and view all the answers

What is the distance associated with Sprenger's deformity in terms of scapula position?

5-6 inches Signup and view all the answers

What is the primary function of the bicipital groove?

Allows for the passage of the tendon of the long head of the biceps. Signup and view all the answers

Which structure connects the right and left clavicle?

Interclavicular ligament Signup and view all the answers

What type of joint is the scapulothoracic joint classified as?

False joint Signup and view all the answers

Which of the following movements does the scapulothoracic joint NOT permit?

Flexion Signup and view all the answers

The suprahumeral joint is also known as what?

Supraspinatus outlet Signup and view all the answers

What is the main action of the trapezius muscle?

Elevation and upward rotation of the scapula Signup and view all the answers

Which nerve innervates the trapezius muscle?

Spinal accessory nerve Signup and view all the answers

Where is the muscle origin for the upper fibers of the trapezius located?

Ligamentum nuchae Signup and view all the answers

Which muscle is typically involved in palpation techniques during shoulder examinations?

Supraspinatus Signup and view all the answers

What degree of elevation does the scapulothoracic joint permit?

10 cm Signup and view all the answers

Study Notes

Bicipital Groove

Prevents superior motion/elevation of the humerus.
Located between the lesser and greater tubercle of the humerus.
Allows for inferior motions/depression, accommodating the tendon of the long head of the biceps.

Interclavicular Ligament

Connects the right and left clavicle, contributing to shoulder stability.

False Joints

Defined as pseudo or functional joints; lack direct bone-to-bone articulation.

Scapulothoracic Joint

Articulates between the thoracic fascia and the fascia of the serratus anterior.
Allows for 3 degrees of freedom (DOF):
- Elevation (up to 10 cm)
- Depression (up to 2 cm)

Suprahumeral Joint

Also known as the supraspinatus outlet; facilitates movement between the humeral neck and coracoacromial arch.
Named musculus cucularis, commonly referred to as the shawl muscle.
Palpation performed in an inclined forward or prone position, assisting with shoulder abduction and scapular retraction.

Trapezius Muscle

Divided into three parts:
- Upper: arises from occipital bone
- Middle: originates from ligamentum nuchae
- Lower: attaches to spinous processes of C7-T12
Insertions:
- Upper: acromial end of clavicle
- Middle: spine of scapula
- Lower: acromion process
Innervated by the spinal accessory nerve (C3-C4, CN XI).
Actions include elevation and upward rotation of the shoulder.

True Joints

Characterized by the meeting of two or more bones to allow movement.
Synovial joints provide flexibility and range of motion.

Shoulder Girdle

Comprises scapula, clavicle, and manubrium with an anterior, lateral, and superior orientation.
Angular value of elevation is approximately 60 degrees.
Features a pear shape, characterized by a wide inferior and narrow superior structure (WINS).
Sprenger’s deformity refers to a congenital high scapula condition, measuring 5-6 inches (13-15 cm) in vertical positioning.

Glenohumeral Ligament

Known as the Z ligament; connects the glenoid labrum to the humeral neck and lesser tubercle.
The weakest shoulder ligament with superior, middle, and inferior parts.

Transverse Humeral Ligament

Connects the lesser and greater tubercle of the humerus, providing additional stability.

Sternoclavicular Joint

Articulation between the sternum and sternal end of the clavicle.
The only joint directly connecting the upper extremity to the axial skeleton.
Provides 3 degrees of freedom:
- Protraction and retraction
- Elevation and depression
- Transverse rotation of the scapula
Features fibrocartilage/meniscus in its capsule for stability and shock absorption.

Ligaments of the Sternoclavicular Joint

Anterior SC ligament resists anterior motions.
Posterior SC ligament resists posterior motions.
Costoclavicular ligament connects the clavicle to the first rib, enhancing joint stability and function.

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Description

Test your knowledge on the bicipital groove and its components in human anatomy. This quiz covers the functions and anatomy related to the bicipital groove, including its role in motion and the interclavicular ligament. Perfect for students studying anatomy or related fields!