Muscle Chart Flashcards
Serratus anterior
Action:
- scapular upward rot & protraction, depression (lower fibers), elevation (upper fibers)
- fixation of scapula to the thorax
Origin:
-Ribs 1-8 by digitations
-Aponeurosis of intercostal
muscles
Insertion:
- Costal surfaces of the:
Superior angle of
scauopa, vertebral
boarder of scapula
- inferior angle of scapula
Innervation:
- Long Thoracic
Nerve (C5-C7)
Upper trapezius
Action:
- elevation of scapula & shoulder
-ROT of head to opposite side
- Capital and cervical EXT
Origin:
- Occipital Protuberance
- Superior Nuchal line of the occipital bone
- Upper Portion of the ligamentum nuchae
- Spinous Process of C7
Insertion:
- Distal/lateral one-third
of clavicle
- Acromion
process
- scapular spine
Innervation:
- Accessory XI
Middle trapezius
Action:
- Scapular retraction
- fixation of thoracic spine
Origin:
- T1-T5 (spinous process)
- lower portion of
ligamentum nuchae
Insertion:
- Acromion process
- spine of the scapula (superior,
lateral border)
Innervation:
- Accessory XI
Lower trapezius
Action:
- Scapular depression, upward ROT and retraction
- Ex ROT and Posterior tipping of the scapula
Origin:
- Spinous processes and supraspinal ligaments of T8-T12
Insertion:
- Spine of the scapula
(medial portion)
Innervation:
-Accessory XI
Levator scapulae
Action:
- scapular elevation & downward rot, ext & rot of c-spine
Origin:
- C1-C4 (transverse process)
Insertion:
- Superior medial angle of
the scapula
Innervation:
-Dorsal Scapular (C3,
C4, C5)
Rhomboid major
Action:
- Scapular Retraction,
elevation, and downward
ROT
Origin:
- T2-T5 (spinous process)
Insertion:
- Vertebral border of
scapula (lower two-
thirds)
Innervation:
- Dorsal Scapular (C4,
C5)
Rhomboid minor
Action:
-Scapular retraction and
elevation
Origin:
- C7-T1 (spinous process)
- Ligamentum nuchae
(lower)
Insertion:
-Vertebral border of
scapula (near the
medial border of the
scapular spine)
Innervation:
- Dorsal Scapular (C4,
C5)
Latissimus Dorsi
Action:
- Shoulder EXT, ADD, IR
- Depression of shoulder
girdle
Origin:
- Spinous Processes of T6-
T12 and the lumbar
vertebrae via the
lumbodorsal fascia
- Posterior Iliac Crest
Insertion:
- Floor of the bicipital
groove of the humerus
Innervation:
- Thoracodorsal (C6-
C8)
Pectoralis major
Action:
- Shoulder ADD, IR
- Humeral FLEX (Clavicular
segment), HORIZONTAL
ADD
- Depression of the
hsoulder girdle (clavicular
fibers)
Origin:
- Medial one-half of the
clavicle
- Anterolateral
portion of the sternum
- Costal cartilages of ribs 6-7
Insertion:
- Greater tuberosity of
the humerus
Innervation:
- Lateral and medial
pectoral (C6-C8)
Pectoralis minor
Action:
- Scapular anterior tilt
Origin:
-Costal cartilages of ribs 6-
7
- Anterior portion of 3rd-
5th ribs
Insertion:
-Coracoid process of
scapula
Innervation:
- Lateral Pectoral
(C7, C8, T1)
Anterior deltoid
Action:
- Shoulder ABD, FLEX and IR
and HORIZONTAL ADD
Origin:
- Lateral one-third of the
clavicle
Insertion:
- Deltoid Tuberosity
Innervation:
- Axillary (C5, C6)
Middle deltoid
Action:
- Shoulder ABD and FLEX
Origin:
- Acromion Process
Insertion:
- Deltoid Tuberosity
Innervation:
- Axillary (C5, C6)
Posterior deltoid
Action:
- Shoulder ABD, EXT, ER,
HORIZONTAL ABD
Origin:
- Spine of the Scapula
Insertion:
- Deltoid Tuberosity
Innervation:
- Axillary (C5, C6)
Coracobrachialis
Action:
- Shoulder FLEX, ADD
Origin:
- Coracoid process
Insertion:
- Medial shaft of the
humerus, adjacent to
the deltoid tuberosity
Innervation:
- Musculocutaneous
(C6-C7)
Teres major
Action:
- Shoulder IR, ADD, EXT
Origin:
- Inferior angle of scapula
- lower one-third of the
axillary border of the
scapula
Insertion:
- Medial lip of the
bicipital groove
Innervation:
- Lower subscapular
(C5-C7)
Supraspinatus
Action:
- Shoulder ABD, ER, and
stabilizes GH joint
Origin:
- Supraspinous fossa
(medial two-thirds) of the
scapula)
Insertion:
- Medial aspect of the
greater tuberosity
- GH joint capsule
Innervation:
- Suprascapular (C4-
C6)
Infraspinatus
Action:
- Shoulder ER, HORIZONTAL
ABD and stabilizes GH
joint
Origin:
- Infraspinous fossa of the
scapula
Insertion:
- Lateral portion of
greater tuberosity of
the humerus
- GH joint (capsule)
Innervation:
- Suprascapular (C5,
C6)
There’s minor
Action:
- Shoulder ER and
HORIZONTAL ABD,
stabilizes GH joint
Origin:
- Lateral upper two-thirds
of axillary border of the
scapula
Insertion:
- Lateral aspect of the
greater tuberosity
Innervation:
- Axillary (C5, C6)
Subscapularis
Action:
- Shoulder IR, Stabilization
of GH joint
Origin:
- Anterior surface
(subscapualr fossa) and
axillary border of the
scapula
Insertion:
- Lesser tuberosity of the
humerus
- ventral
portion of the GH
capsule
Innervation:
- Upper and Lower
Subscapular (C5-C7)
