Axial musculature Flashcards
Pectoantebrachialis
Origin: Manubrium
insertion: fascia of ulna
Pectoralis Major
origin: sternum
insertion: humerus
innervation: medial and lateral pectpral n.
action: flexes and adducts the arm, medially rotates the arm
Pectoralis minor
largest pectoral muscle in cat
origin: sternum
insertion: humerus
innervation: medial pectoral n.
action: draws the scapula forward, medialward, and downward
Xiphihumeralis
most posterior
origin: xiphoid process of sternum
insertion: humerus
external oblique
internal oblique
serratus ventralis
moves the scapua bentrally and anteriorly
origin: ribs
insertion: scapula
inervation: long thoracic n.
Anterior to posterior:
clavotrapezius (insert on clavicle)
acromiotrapezius (insert on scapula)
spinotrapezius (insert on scapula)
origin: skull–> thoracic
Accessory n.
levator scapulae ventralis
superficial between clavotrapezius and acromiotrapezius
moves scapula anteriorly
origin: occipital bone
insertion: scapula
innervation: dorsal scapular n.
latissimus dorsi
action: moves the forelim posteriorly
origin: lumbodorsal fossa
insertion: humerus
innervation: thoracodorsal n
teres major
action: rotates humerus and moves forearm posteriorly
origin: scapula
insertion: humerus
innervation: lower subscapular n.
anterior to posterior:
clavodeltoid
acromiodeltoid
spinodeltoid
origin: pectoral girdle
insertion: humerus or ulna
anterior digastric
depression of the mandible
origin: mandible
insertion: hyoid
inervation: CN V
mylohyoid
muscular floor of the mouth
origin: mandible
insertion: hyoid
innervation: CN V
3
sternohyoid
moves the larynx and hyoid bone posteriorly
origin: manubrum, clavicle
insertion: hyoid
4
sternothyroid
moves larynx posteriorly
origin: manubrum
insertion: thyroid cartilage
