Arm 2 Origins and Insertions

Deltoid tuberosity
humerus

Axillary n. (C5,6)
DAMAGE: right‐
angled shoulder

Abduction (15‐
90) , extension,
lateral rotation
DAMAGE Right angeled shoulder

Superior facet
greater tubercle
humerus

Suprascapular n.
(C4,5,6)
DAMAGE:
abduction
difficult/impossible

Lateral rotation.
Assists abduction
(0 – 15 )

Middle facet of
greater tubercle
humerus

Suprascapular n.
(C4,5,6)

Lateral rotation.
Helps keep head
of humerus in
during abduction

Inferior facet of
greater tubercle
humerus

Axillary n. (C5,6)

Lateral rotation
and adduction

Medial lip of
intertubercular
groove humerus

Lower subscapular n. (C5,6)

Adduction and
medial rotation

Lesser tubercle of
the humerus

Lower and upper
subscapular nerve.
(C5,6)

Medial rotation

Lateral lip of the
intertubercular
groove of
humerus

Lateral and medial
pectoral nerves

Adduction
medial
rotation

Coracoid process
of scapula

Medial pectoral
nerve

Draws
scapula
inferiorly
anteriorly

Nerve to the
subclavius

Anchors
depresses
the clavicle

Long thoracic n.
(C5,6,7)

Holds
scapula
against
thoracic
cage