Q32 Latissimus Dorsi Flashcards

1
Q

State the attachments of this muscle

A

The proximal attachment of latissimus dorsi is to by the thorocolumbar fascia to spinous processes of T6-T12, all of the lumbar and sacral vertebrae as well as the intervening supraspinous and interspinous ligaments, iliac crest, lower 3-4 ribs and inferior angle of Scapula. The distal attachment is to the floor of the inter tubercular sulcus (bicipital groove) on the humerus between pectoralis major and teres major

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2
Q

Give the actions of this muscle

A

Extension of the flexed arm, adducts and medially rotates the humerus at the shoulder joint

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3
Q

State 2 functional activities in which this muscle plays an important role

A

Functional activities: pulls the arm down and back from elevation against resistance so activities such as swimming and rowing are possible. When using crutches it pulls the trunk forward in relation to the arms lifting the pelvis making this possible.

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