Axial Skeleton Muscles test task with
correct answers
Buccinator - CORRECT ANSWERS-D: main muscle of the cheek deep to the masseter
O: posterior maxillary bone and mandible
I: orbicularis oris
A: compresses cheeks as in whistling, blowing or sucking
*muscles of mastication
Deltiod - CORRECT ANSWERS-D; triangular muscle atop the shoulder
O: acromion and spine of scapula, lateral third of clavicle
I: deltoiid tuberosity of humerus
A: abduction of the arm at the shoulder
* ant. trunk muscles that move arm and shoulder
Diaphragm - CORRECT ANSWERS-D: broad, flat, circular muscle forming the floor of
the thoracic cavity
O: xiphoid process of sternum; costal cartialge of last 6 ribs and lumbar vertebae
I: central tendon of diaphragm (no bone)
A: flattens to increase the volume of the thoracic cavity; inspiration
*muscles of respiration
Erector spinae - CORRECT ANSWERS-D: long back muscle with three columns (I/L/S)
from pelvis to head
O: illiac crest, transverse processes of cervical, throacic and lumbar vertebrae, and/or
ribs 3-6
I: ribs and transvers processes of vertebrae about 6 segments above origin
A: extends and laterally rotates the vertebral column
*posterior trunk muscles that move vertebral column
External intercostals - CORRECT ANSWERS-D: 11 pairs extended from rib to rib in
oblique downward direction
O: inferior border of each rib
I: superior border of rib below
A: pulls ribs to one another to elevate thoracic cavity: inspiration
*muscles of respiration
, External oblique - CORRECT ANSWERS-D: lateral, superficial muscle of the abdomen
extending from pubis to thoracic cage
O: ribs 4/12
I: linea alba, pubic crest, costal cartilages of ribs 9-12
A: flexes and roates vertebral columb
*ant. trunk muscles - move abdomen/vertebral column
Frontalis - CORRECT ANSWERS-D: Two muscles connected via an aponeurosis
O: At cranial aponeurosis
I: at skin of eyebrow and root of nose
A: raises eyebrows
*facial expression
Infraspinatus - CORRECT ANSWERS-D: deep to traps w/in infraspinous fossa, rotator
cuff muscle
O: infraspinous fossa
I: greater tubercle of humerus
A: lateral rotation of the arm
*post. trunk muscles that move arm and shoulderf
Internal intercostals - CORRECT ANSWERS-D: 11 pairs extended from rib to rib in
direction opposite to external
O: superior border of each rib
I: inferior border of rib above
A: draws ribs together to depress thorax expiration
*Muscles of respiration
Internal oblique - CORRECT ANSWERS-D: deep to the external oblique with fibers
extending in opposite direction
O: illiac crest, lumbar fascia
I: linea alba, pubic crest, costal cartilages of ribs 9-12
A: flexes and rotates vertebral column
*ant. trunk muscles - move abdomen/vertebral column
Latissimus dorsie - CORRECT ANSWERS-D: broad, flat muscle of lower back
O: spinous processes of lower 6 thoracic vertebrae, all lumbar vertebrae, ribs 8-12,
lumbodorsal fascia
I: intertubercular groove of humerus
A: extends, adducts, and medially rotates shoulder
*post. trunk muscles that move arm and shoulder
Levator scapulae - CORRECT ANSWERS-D: between the shoulder and neck deep to
the trap
O: transverse processes of the first 4 cervicle vertebrae
I: vertebral border of scapula
A: elevates the scapula
correct answers
Buccinator - CORRECT ANSWERS-D: main muscle of the cheek deep to the masseter
O: posterior maxillary bone and mandible
I: orbicularis oris
A: compresses cheeks as in whistling, blowing or sucking
*muscles of mastication
Deltiod - CORRECT ANSWERS-D; triangular muscle atop the shoulder
O: acromion and spine of scapula, lateral third of clavicle
I: deltoiid tuberosity of humerus
A: abduction of the arm at the shoulder
* ant. trunk muscles that move arm and shoulder
Diaphragm - CORRECT ANSWERS-D: broad, flat, circular muscle forming the floor of
the thoracic cavity
O: xiphoid process of sternum; costal cartialge of last 6 ribs and lumbar vertebae
I: central tendon of diaphragm (no bone)
A: flattens to increase the volume of the thoracic cavity; inspiration
*muscles of respiration
Erector spinae - CORRECT ANSWERS-D: long back muscle with three columns (I/L/S)
from pelvis to head
O: illiac crest, transverse processes of cervical, throacic and lumbar vertebrae, and/or
ribs 3-6
I: ribs and transvers processes of vertebrae about 6 segments above origin
A: extends and laterally rotates the vertebral column
*posterior trunk muscles that move vertebral column
External intercostals - CORRECT ANSWERS-D: 11 pairs extended from rib to rib in
oblique downward direction
O: inferior border of each rib
I: superior border of rib below
A: pulls ribs to one another to elevate thoracic cavity: inspiration
*muscles of respiration
, External oblique - CORRECT ANSWERS-D: lateral, superficial muscle of the abdomen
extending from pubis to thoracic cage
O: ribs 4/12
I: linea alba, pubic crest, costal cartilages of ribs 9-12
A: flexes and roates vertebral columb
*ant. trunk muscles - move abdomen/vertebral column
Frontalis - CORRECT ANSWERS-D: Two muscles connected via an aponeurosis
O: At cranial aponeurosis
I: at skin of eyebrow and root of nose
A: raises eyebrows
*facial expression
Infraspinatus - CORRECT ANSWERS-D: deep to traps w/in infraspinous fossa, rotator
cuff muscle
O: infraspinous fossa
I: greater tubercle of humerus
A: lateral rotation of the arm
*post. trunk muscles that move arm and shoulderf
Internal intercostals - CORRECT ANSWERS-D: 11 pairs extended from rib to rib in
direction opposite to external
O: superior border of each rib
I: inferior border of rib above
A: draws ribs together to depress thorax expiration
*Muscles of respiration
Internal oblique - CORRECT ANSWERS-D: deep to the external oblique with fibers
extending in opposite direction
O: illiac crest, lumbar fascia
I: linea alba, pubic crest, costal cartilages of ribs 9-12
A: flexes and rotates vertebral column
*ant. trunk muscles - move abdomen/vertebral column
Latissimus dorsie - CORRECT ANSWERS-D: broad, flat muscle of lower back
O: spinous processes of lower 6 thoracic vertebrae, all lumbar vertebrae, ribs 8-12,
lumbodorsal fascia
I: intertubercular groove of humerus
A: extends, adducts, and medially rotates shoulder
*post. trunk muscles that move arm and shoulder
Levator scapulae - CORRECT ANSWERS-D: between the shoulder and neck deep to
the trap
O: transverse processes of the first 4 cervicle vertebrae
I: vertebral border of scapula
A: elevates the scapula
