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Shoulder Muscles
The Rotator Cuff
Supraspinatus
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Created by
Hiri P
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Cards (7)
O (origin)
Medial
2
/3 of the
supraspinous fossa
A)
Supraspinatus
1
R (direction)
Laterally
A)
Supraspinatus
1
I (insertion)
Tendon
forms
within
the
muscle
as it passes
laterally
below
trapezius
, the
acromion process
and the
coracoacromial ligament
Tendon
blends
in with
superior
aspect of the
glenohumeral
joint
capsule
Inserts into
upper
facet on the
greater tubercle
of
humerus
A)
Supraspinatus
1
A (actions)
Initiates
abduction
of
glenohumeral
joint
A)
Supraspinatus
1
NS (nerve supply)
Suprascapular
nerve (
C4
-
C6
)
A)
Supraspinatus
1
Supraspinatus:
Located on
posterior
aspect of
scapula
above the
spine
of
scapula
,
deep
to
trapezius
Supraspinatus - Function:
Holds the
head
of
humerus
against the
glenoid fossa
to prevent
upward shearing
A)
Supraspinatus
1