Upper limb (muscles of the shoulder) Flashcards
What muscles insert onto the lesser tubercle?
Subscapularis
What muscles insert onto the greater tubercle?
- Supraspinatus
- Infraspinatus
- Teres minor
What muscles insert in the intertubercular sulcus?
- Pectoralis major: Lateral lip
- Latissimus dorsi: Floor
- Teres major: Medial lip
What are the origin of trapezius?
- Spinous processes of C7-T12
- Superior nuchal line
- External occipital protuberance
What are the origins of latissimus dorsi?
Lower 6 thoracic vertebrae
What are the origins of serratus anterior?
Lateral surface of upper 8-9 ribs
What are the origins of Levator scapulae?
Transverse processes of C1-C4
What are the origins of rhomboid major?
Spinous processes ofT2-T5
What are the origins of rhomboid minor?
- Ligamentum nuchae
- Spinous processes of C7 and T1
Which muscles are responsible for flexion of the arm at shoulder joint?
- Biceps brachii
- Pectoralis major
- Anterior fibres of deltoid
- Coracobrachialis
Which muscles are responsible for extension of the arm at shoulder joint?
- Posterior fibres of deltoid
- Latissius dorsi
- Teres major
Which muscles are responsible for abduction of the arm at shoulder joint?
0-15 degrees: Supraspinatus
15-120 degrees: Lateral fibres of deltoid
>120 degrees: Upwards rotation of the scapula, trapezius and serratus anterior
Which muscles are responsible for adduction of the arm at shoulder joint?
- Pectoralis major
- Latissimus dorsi
- Teres major
Which muscles are responsible for medial rotation of the arm at shoulder joint?
- Subscapularis
- Latissimus dorsi
- Teres major
- Pectoralis major
- Anterior fibres of deltoid
Which muscles are responsible for lateral rotation of the arm at shoulder joint?
- Infraspinatus
- Teres minor
