Lab 5 Flashcards
CAT
pectoantebrachialis
origin: manubrium of sternum
Insertion: fascia of the antebrachium
Action: adducts and protracts humerus
CAT
pectoralis major and minor
origin: sternum
Insertion: humerus
action: adducts humerus
CAT
xiphihumeralis
origin: xiphoid * process of sternum
insertion: humerus
action: adducts and retracts humerus
CAT
clavotrapezius
origin: spinous process
insertion: clavical
action: pulls scapula dorsally
CAT
acromiotrapezius
origin: spinous process
insertion: acromion
action: pulls scapula dorsally
CAT
spinotrapezius
origin: spinous process
insertion: spine of scapula
action: protracts humerus
CAT
latissimus dorsi
origin: spinous process through lumbodorsal fascia
insertion: humerus
action: retracts humerus
CAT
levator scapulae ventralis
origin: atlas
insertion: scapula
action: pulls scapula cranially
CAT
spinodeltoid
origin: spine of scapula
insertion: mid-humerus
action: retracts humerus
CAT
acromiodeltiod
origin: acromion
insertion: mid-humerus
action: retracts humerus
CAT
clavobranchialis
origin: clavicle
insertion: mid-humerus
action: protracts humerus
where is the clavicle
it is not attached to any bone, and it floats in the connective tissue at the insertion of the clavotrapezius and the clavobranchialis
what would be the advantage of having these several distinct muscles, rather than a single muscle
more subtle variety of movement
define protraction of the humerus
extending outwards
define retraction of the humerus
bringing toward the body
what are the rhomboid group and settates ventralis homologous with
portions of the external oblique muscles of amphibians
CAT
subscapularis
origin: subscapular fossa
insertion: lesser tuberosity
action: adducts humerus
CAT
supraspinatus
origin: supraspinatus fossa
insertion: greater tuberosity
action: protracts humerus
CAT
infraspinatus
origin: infraspinatus fossa
insertion: greater tuberosity
action: lateral rotation
CAT
teres minor
origin: cranial border of scapula
insertion: greater tuberoisity
action: medial rotation
CAT
teres major
origin: caudal border of scapula
insertion: proximal humerus
action: retracts humerus
CAT
rhomboideus (capitis, cervices, and thoracis parts)
origin: spinous process
insertion: vertebral (superior) border of scapula
action: pulls scapula cranially, or toward cervical/yhoracic vertebrae
CAT
serratus ventralis
origin: ribs
insertion: vertebral (superior) border of scapula
action: protracts scapula (pulls it downard)
when standing, which muscle of a quadrupedal mammal, like a cat, bears the weight of the body on the forelimb?
serratus ventralis
