Muscle Attachments of the Clavicle

Study Notes

Clavicle Muscle Attachments

The clavicle, or collarbone, is crucial for muscular attachment, supporting shoulder, arm, and chest movements.
Deltoid Muscle:
- Attaches to the lateral aspect of the clavicle.
- Functions include flexing, extending, and rotating the shoulder joint.
Trapezius Muscle:
- Connects to the lateral aspect of the clavicle.
- Aids in shoulder elevation, depression, and rotation.
Sternocleidomastoid Muscle:
- Attaches to the medial aspect of the clavicle.
- Responsible for head and neck flexion and rotation.
Pectoralis Major Muscle:
- Connects to the medial aspect of the clavicle.
- Involved in shoulder flexion, extension, and adduction.
Subclavius Muscle:
- Attaches to the inferior surface of the clavicle.
- Helps stabilize the clavicle and assist with shoulder movements.
These muscle connections are essential for optimal shoulder and neck functionality.
Terminology and grouping of attachments may vary in different sources.

Scapula Muscle Attachments

The scapula functions as an important anchor for muscles that facilitate shoulder, arm, and chest movements.
Major muscles attached to the scapula include:

Deltoid Muscle

Attaches to the spine of the scapula.
Primary roles include flexing, extending, and rotating the shoulder joint.

Supraspinatus Muscle

Connects to the supraspinous fossa, positioned above the spine.
Aids in shoulder abduction and stability during movement.

Infraspinatus Muscle

Attached to the infraspinous fossa, located below the spine.
Supports shoulder joint rotation and contributes to scapular stabilization.

Teres Minor Muscle

Connects to the lateral border of the scapula.
Assists with shoulder adduction and rotation, enhancing overall mobility.

Teres Major Muscle

Attaches to the medial border of the scapula.
Functions to adduct and rotate the shoulder joint, providing strength to arm movements.

Serratus Anterior Muscle

Attaches to the medial border and anterior surface of the scapula.
Promotes shoulder abduction, enables rotation, and facilitates forward arm movement.

Trapezius Muscle

Connects to the spine and lateral border of the scapula.
Involved in elevating, depressing, and rotating the scapula, impacting upper back posture and movement.

Rhomboid Major and Minor Muscles

These muscles attach to the medial border of the scapula.
Assist in the rotation and stabilization of the scapula, critical for maintaining shoulder integrity.

Levator Scapulae Muscle

Attaches to the transverse processes of cervical vertebrae and the superior angle of the scapula.
Primarily functions to elevate the scapula.

Pectoralis Minor Muscle

Connects to the coracoid process of the scapula.
Plays a role in shoulder movements and the rotation of the scapula, essential for various arm activities.
These attachments are crucial for effective scapular and shoulder function, enabling a wide range of movements.

Description

This quiz explores the main muscle attachments to the clavicle, including the deltoid, trapezius, and sternocleidomastoid muscles. Test your knowledge on how these muscles contribute to shoulder, arm, and chest movements. Perfect for anatomy students looking to solidify their understanding.