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Masculoskeletal Gross Anatomy
MOINA2
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Cards (20)
What is the origin of the Pectoralis major muscle?
Clavicle
,
sternum
, and
upper six costal cartilages
Where does the Pectoralis major muscle insert?
Lateral lip
of
bicipital groove
of
humerus
What is the nerve supply for the Pectoralis major muscle?
Medial
and
lateral pectoral
nerves from
brachial plexus
What are the nerve roots associated with the Pectoralis major muscle?
C5
,
6
,
7
,
8
;
T1
What action does the Pectoralis major muscle perform?
Adducts
arm and
rotates
it
medially
; clavicular fibers also
flex
arm
What is the origin of the Pectoralis minor muscle?
3rd
,
4th
, and
5th
ribs
Where does the Pectoralis minor muscle insert?
Coracoid process
of
scapula
What is the nerve supply for the Pectoralis minor muscle?
Medial pectoral
nerve from
brachial plexus
What are the nerve roots associated with the Pectoralis minor muscle?
C6, 7, 8
What action does the Pectoralis minor muscle perform?
Depresses
point of
shoulder
; if the
scapula
is
fixed
, it
elevates
the
ribs
of
origin
What is the origin of the Subclavius muscle?
1st costal cartilage
Where does the Subclavius muscle insert?
Clavicle
What is the nerve supply for the Subclavius muscle?
Nerve to subclavius from upper trunk of brachial plexus
What are the nerve roots associated with the Subclavius muscle?
C5, 6
What action does the Subclavius muscle perform?
Depresses
the
clavicle
and
steadies
this
bone
during
movements
of the
shoulder girdle
What is the origin of the
Serratus anterior
muscle?
Upper eight ribs
Where does the Serratus anterior muscle insert?
Medial border
and
inferior angle
of
scapula
What is the nerve supply for the Serratus anterior muscle?
Long thoracic
nerve
What are the nerve roots associated with the Serratus anterior muscle?
C5, 6, 7
What action does the Serratus anterior muscle perform?
Draws
the
scapula forward
around the
thoracic wall
;
rotates scapula