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ANATOMY
Medicine Made Simple
, Muscles of Upper Limb
Muscles of shoulder
Muscle Origin Insertion Innervation Function
Trapezius Superior nuchal line, Superior edge of the Motor: spinal Upper fibres: Powerful
* external occipital crest of the spine of part of elevator of the scapula
protuberance, the scapula, accessory during abduction of
medial margin of the medial margin of nerve (XI) humerus above horizontal
ligamentum nuchae, acromion, Sensory level
spinous process of C7 to posterior border of (proprioceptio middle fibres: retract
T12 and the related lateral one third of n): scapula
supraspinous ligaments clavicle anterior rami lower fibres: depress
of C3 and C4 scapula
Deltoid* Posterior fibers- Inferior Deltoid tuberosity of Axillary nerve Major abductor of arm
edge of the crest of the humerus (C5, C6) (abducts arm beyond
spine of the scapula initial 15 done by
Middle fibers- lateral supraspinatus)
margin of the acromion clavicular fibres: assist in
Anterior fibers- anterior flexing the arm
border of lateral one third posterior fibres: assist in
of clavicle extending the arm
Levator Transverse process of C1 Posterior surface of Branches Elevates the scapula
Scapulae and C2 vertebrae and medial border of directly from
posterior surface of scapula from anterior rami
transverse processes of superior angle to of C3 and C4
C3 and C4 vertebrae root of spine of the spinal nerves
scapula and by
branches (C5)
from dorsal
scapular nerve
Rhomboid Lower end of the Posterior surface of Dorsal Elevates and retracts the
minor ligamentum nuchae and medial border of scapular nerve scapula
spinous process of C7 and scapula at the root (C4, C5)
T1 vertebrae of the spine of the
scapula
Rhomboid Spinous process of T2-T5 Posterior surface of Dorsal Elevates and retracts the
major vertebrae and intervening medial border of scapular nerve scapula
supraspinous ligaments scapula from the (C4, C5)
root of the spine of
the scapula to the
inferior angle
1
ANATOMY
Medicine Made Simple
, Muscles of Upper Limb
Muscles of shoulder
Muscle Origin Insertion Innervation Function
Trapezius Superior nuchal line, Superior edge of the Motor: spinal Upper fibres: Powerful
* external occipital crest of the spine of part of elevator of the scapula
protuberance, the scapula, accessory during abduction of
medial margin of the medial margin of nerve (XI) humerus above horizontal
ligamentum nuchae, acromion, Sensory level
spinous process of C7 to posterior border of (proprioceptio middle fibres: retract
T12 and the related lateral one third of n): scapula
supraspinous ligaments clavicle anterior rami lower fibres: depress
of C3 and C4 scapula
Deltoid* Posterior fibers- Inferior Deltoid tuberosity of Axillary nerve Major abductor of arm
edge of the crest of the humerus (C5, C6) (abducts arm beyond
spine of the scapula initial 15 done by
Middle fibers- lateral supraspinatus)
margin of the acromion clavicular fibres: assist in
Anterior fibers- anterior flexing the arm
border of lateral one third posterior fibres: assist in
of clavicle extending the arm
Levator Transverse process of C1 Posterior surface of Branches Elevates the scapula
Scapulae and C2 vertebrae and medial border of directly from
posterior surface of scapula from anterior rami
transverse processes of superior angle to of C3 and C4
C3 and C4 vertebrae root of spine of the spinal nerves
scapula and by
branches (C5)
from dorsal
scapular nerve
Rhomboid Lower end of the Posterior surface of Dorsal Elevates and retracts the
minor ligamentum nuchae and medial border of scapular nerve scapula
spinous process of C7 and scapula at the root (C4, C5)
T1 vertebrae of the spine of the
scapula
Rhomboid Spinous process of T2-T5 Posterior surface of Dorsal Elevates and retracts the
major vertebrae and intervening medial border of scapular nerve scapula
supraspinous ligaments scapula from the (C4, C5)
root of the spine of
the scapula to the
inferior angle
1
