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Superficial layer - Posterior Pectoral Girdle
Trapezius
Middle Trapezius
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Created by
Hiri P
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Cards (5)
O (origin)
Extensive
medial
attachment from the
base
of the
medial
1
/3 of the
superior nuchal line
and the
occipital
bone
Ligamentum nuchae
Spinous processes
of
C7
to
T12
and the
intervening
supraspinous ligament
A)
Middle Trapezius
1
R (direction)
Almost
horizontally
A)
Middle Trapezius
1
I (insertions)
Medial
border of the
acromion
and the
upper
border
of the
crest
of the
scapula spine
A)
Middle Trapezius
1
A (actions)
Retraction
of
scapula
A)
Middle Trapezius
1
NS (nerve supply)
Motor:
Spinal
part of
cranial
nerve
11
(‘Accessory’ nerve)
Sensory:
Ventral rami
C3
,
C4
A)
Middle Trapezius
1