Muscles of Thorax & Abdomen Flashcards
Insertion, Origin, & Action
pectoralis major origin
sternum
clavicle
costal cartilages
pectoralis minor origin
ribs 3-5
deltoid origin
clavicle
trapezius origin
superior nuchal line
C7-T12 vertebrae
serratus anterior origin
ribs 1-8
respiratory diapraghm origin
rib cage
sternum
lumbar vertebrae
latissimus dorsi origin
thoracic & lumbar vertebrae
ribs
iliac crest
subscapularis origin
scapula
rhomboids origin
C7-T5 vertebrae
levator scapulae origin
C1-C4 vertebrae
supraspinatus & infraspinatus origin
scapula
teres major & minor origin
scapula
external oblique origin
lower 8 ribs
internal oblique origin
iliac crest
rectus abdominis origin
pubis
transverse abdominis origin
last 6 ribs
iliac crest
Which 3 muscles insert at the linea alba?
external oblique
internal oblique
transverse abdominus
Which 3 muscles insert at the greater tubercle of the humerus?
supraspinatus
infraspinatus
teres minor
Which 5 muscles insert at the humerus (not greater tubercle)?
pectoralis major
deltoid
latissimus dorsi
subscapularis
teres major
Which muscle inserts at both the clavicle & scapula?
trapezius
Which muscle originates at C7-T5 vertebrae?
rhomboids
Which muscle originates at the superior border of the rib below (goes upwards)?
internal intercostals
pectoralis major insertion
humerus
pectoralis minor insertion
scapula
deltoid insertion
deltoid tuberosity of humerus
trapezius insertion
scapula & clavicle
respiratory diaphragm insertion
central tendon
serratus anterior insertion
scapula
latissimus dorsi insertion
humerus
subscapularis insertion
lesser tubercle of humerus
rhomboids insertion
scapula
levator scapulae insertion
scapula
supraspinatus & infraspinatus insertion
greater tubercle of humerus
teres major & minor insertion
major - humerus
minor - greater tubercle of humerus
The external oblique, internal oblique and transverse abdominis insert at the…
linea alba
rectus abdominis insertion
xiphoid process & ribs
transverse abdominis insertion
linea alba
Which muscles compress the abdominal contents?
obliques
rectus & transverse abdominis
Which muscles stabilize the shoulder joint?
subscapularis
supraspinatus & infraspinatus
teres minor
2 muscles that abduct the arm
deltoid
supraspinatus
3 muscles that adduct the arm
pectoralis major
latissimus dorsi
teres major
one action that the rhomboids do
retract the scapula
or: stabilizes the scapula
one action the trapezius does
rotates the scapula
or: elevates the scapula
or: retracts the scapula
What actions does the deltoid do for the arm?
flexes, extends, abducts, medially rotates
Which muscles can laterally rotate the arm?
infraspinatus
teres minor
Which 5 muscles can medially rotate the arm?
- pectoralis major
- deltoid
- latissimus dorsi
- subscapularis
- teres major
Which muscle can rotate the scapula?
trapezius
Which muscle allows us to forcefully inhale?
external intercostals
Which 2 muscles can flex the arm (move it forward)?
pectoralis major
deltoid
Which 3 muscles can extend the arm (move it back)?
latissimus dorsi
deltoid
teres major
Which muscle can flex the vertebral column?
rectus abdominus
Which muscles can rotate the vertebral column?
obliques