Attachments of Muscles Connecting Trunk To The Upper Extremity (SIL)

Question 1

Latissimus Dorsi (C6-8)

Answer 1

Attachments: From lower thoracic spinous processes, thoracolumbar fascia and iliac crest to the floor of the intertubercular sulcus of the humerus.

Question 2

Levator Scapulae (C4-5)

Answer 2

Attachments: from transverse processed of C1-C4 to the superior angle & superomedial border of the scapula

Question 3

Pectoralis Major (clavicular head C5-6; sternocostal head C7-T1)

Answer 3

Attachments: from clavicle, costal cartilages, sternum & aponeuroris of the external oblique to the lateral lip of the intertubercular sulcus of the humerus.

Question 4

Pectoralis Minor (C5-T1)

Answer 4

Attachments: outer surfaces of ribs 3-5 to the coracoid process

Question 5

Rhomboids Major (C4-5)

Answer 5

Attachments: from spinous processes T2-5 to the medial border of the scapula

Question 6

Rhomboids Minor (C4-5)

Answer 6

Attachments: From ligamentum nuchae & spinous processes C7-T1 to the medial border of the scapula

Question 7

Serratus Anterior (C5-7)

Answer 7

Attachments: From the outer surfaces and superior borders of upper eight-ten ribs to the costal surface of the medial border of the scapula.

Question 8

Subclavius (C5-6)

Answer 8

Attachments: from 1st rib & cartilage to the undersurface of the clavicle

Question 9

Trapezius (Accessory n [CN XI] motor; C3-4 sensory)

Answer 9

Attachments - from the superior nuchal line, external occipital protuberance, ligamentum nuchae & cervical & thoracic spinous processes to the clavicle, acromion & scapular spine