extrinsic muscles of forelimb Flashcards
superficial pectoral m. attachment
cranial 1/4 of sternum
crest of greater tubercle
deep pectoral attachment
sternum
lesser tubercle, greater tubercle, medial fascia of arm
brachiocephalicus attachment
cranial border of humerus
median raphe and nuchal crest
omotransversarius attachment
distal 1/3 of spine of scapula
transverse process of the atlas
trapezius attachment
dorsal midline from C3-T9
proximal 1/3 of spine of scapula
rhomboideus attachment
occipital bone
dorsal midline of neck
dorsally to the midline of thoracic vertebrae cranial to the latissimus dorsi
dorsal border of scapula
latissimus dorsi
spinous processes of lumbar and last 7-8 thoracic vertebrae
proximal medial side of humerus
serratus ventralis
transverse processes of last 5 cervical vertebrae, first 7-8 ribs
dorsal medial aspect of scapula
function of superficial pectoral
adduct limb or prevent limb from being abducted
deep pectoral function
pull body cranially or pull limb cran/caud
can also flex the shoulder
maintain weight against force of gravity
brachiocephalicus func
advance limb cranially
and draw the head to one side
omotransversarius func
move limb cranially and can move head down and to one side
(if contracting bilaterally, only move head down)
trapezius func
elevates limb and abducts limb
rhomboideus func
hold scapula close to trunk, elevates limb
latissimus dorsi
pull limb caudally, flex shoulder
