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Details

Muscles
Origins, Insertions, and Actions
31
Medical
Not Applicable
08/12/2006

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Cards

Term
Trapezius Origin
Definition
External Occipital Protuberance
Superior Nuchal lines
Nuchal Ligament
Spinous Processes of C7-T12
Term
Trapezius Insertion
Definition
Lateral one third of clavicle
acromion process
scapular spine
Term
Trapezius Action
Definition
Extends neck and head (bilateral)
Elevates the scapula
Upwardly rotates scapula
Retracts scapula
Depresses the scapula
Laterally flexes the neck (unilateral)
Rotates the head (unilateral)
Term
Levator Scapulae Origin
Definition
Transverse Processes of C1-C4
Term
Levator Scapulae Insertion
Definition
Medial border of scapula (superior angle to root of spine)
Term
Levator Scapulae Action
Definition
Elevates scapulae
Downwardly rotates scapula
Laterally flexes the neck
Term
Rhomboids Major Origin
Definition
Spinous Processes of T2-T5
Term
Rhomboids Major Insertion
Definition
Medial border of the scapula, from root of scapular spine to inferior angle
Term
Rhomboids Major Action
Definition
Retracts Scapula
Downwardly Rotates scapula
Term
Rhomboids Minor Origin
Definition
Spinous Processes of C7-T1
Term
Rhomboids Minor Insertion
Definition
Medial border of the scapula, from root of scapular spine to inferior angle
Term
Rhomboids Minor Action
Definition
Retracts the scapula
Downwardly rotates scapula
Term
Serratus Anterior Origin
Definition
Ribs 1-8 (lateral to costal cartilage)
Term
Serratus Anterior Insertion
Definition
Anterior medial border of scapula
Term
Serratus Anterior Action
Definition
Protracts scapula
Upwardly rotates scapula
Term
Pectoralis Minor Origin
Definition
Ribs 3-5 (lateral to costal cartilage)
Term
Pectoralis Minor Insertion
Definition
Coracoid process of scapula
Term
Pectoralis Minor Action
Definition
Depresses scapula
Protracts scapula
Downwardly rotates scapula
Assists in forced inspiration
Term
Latissimus Dorsi Origin
Definition
Spinous processes of T6-L5
Ribs 9-12 (posterior surface)
Posterior iliac crest
Posterioir sacrum
Term
Latissimus Dorsi Insertion
Definition
intertubercular groove of the humerus
Term
Latissimus Dorsi Action
Definition
Extends the shoulder
Medially rotates the shoulder
Adducts the shoulder
Term
Teres Major Origin
Definition
Inferior half of lateral border of scapula
Term
Teres Major Insertion
Definition
Intertubercular groove of the humerus
Term
Teres Major Action
Definition
Extends shoulder
Medially rotates shoulder
Adducts shoulder
Term
Supraspinatus Origin
Definition
Supraspinatus fossa of scapula
Term
Supraspinatus Insertion
Definition
Greater tubercle of humerus
Term
Supraspinatus Action
Definition
Abducts shoulder
Term
Infraspinatus Origin
Definition
Infraspinatus fossa of scapula
Term
Infraspinatus Insertion
Definition
Greater tubercle of humerus
Term
Infraspinatus Action
Definition
Laterally rotates shoulder
Term
Infraspinatus Action
Definition
Laterally rotates shoulder
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