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Actions of Shoulder & Back muscles
Gross Anatomy, LLUSOM 2014
16
Medical
Professional
09/19/2010

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Cards

Term
Trapezius
Definition
Accessory n.

elevates scapula, depresses scapula, retracts scapula,
superior rotation of scapula
Term
Latissumus Dorsi
Definition
Thoradodorsal n.

Extension of arm, adduction of arm, medial rotation of arm, raises body towards arm
Term
Levator scapulae
Definition
Dorsal scapular n.
C3-5
Elevates scapula, inferior rotation of scapula
Term
Rhomboids
Definition
Dorsal scapular
C4-5

Retracts scapula, inf. Rotation of scapula, fix scapula to thoracic wall
Term
Serratus anterior
Definition
Long thoracic n.
C5-7

Protracts scapula, rotation of scapula, fixes scapula to thoracic wall
Term
Deltoid
Definition
Long thoracic n.

Protracts scapula, rotation of scapula, fixes scapula to thor. wall
Term
Subscapularis
Definition
Upper & lower subscapular n

Medially rotates arm, holds humerus in place
Term
Supraspinatus
Definition
Suprascapular n. (thru subrascapular notch under ligament)

Aids in abduction of arm, holds humerus in place
Term
Infraspinatus
Definition
Suprascapular n.

Laterally rotates arm, holds humerus in place
Term
Teres minor
Definition
Axillary n.

Laterally rotates arm, holds humerus in place
Term
Teres major
Definition
Subscapular n.

Adducts arm, medially rotates, extension
Term
Splenius capitis
Definition
Dorsal rami C2-C6

Extends and laterally bends neck/head, rotates head to same side
Term
Erector Spinae
Definition
Dorsal Rami

Extends and laterally bends trunk and neck
Term
Rectus capitus posterior major and minor
Definition
suboccipital n.

extends head
Term
obliquus capitis superior and inferior
Definition
suboccipital n.

rotates head to same side
Term
sternocleidomastoid
Definition
Accessory n.
C2-3

Ear to shoulder, chin up and down
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